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@article{faucris.112598244,
abstract = {The Mediterranean is considered as an area which will be affected strongly by current climate change. However, temperature records for the past centuries which can contribute to a better understanding of future climate changes are still sparse for this region. Carbon isotope chronologies from tree-rings often mirror temperature history but their application as climate proxies is difficult due to the influence of the anthropogenic change in atmospheric CO2 on the carbon isotope fractionation during photosynthetic CO2 uptake. We tested the influence of different correction models accounting for plant response to increased atmospheric CO2 on four annually resolved long-term carbon isotope records (between 400 and 800 yr) derived from Corsican pine trees (Pinus nigra ssp. laricio) growing at ecologically varying mountain sites on the island of Corsica. The different correction factors have only a minor influence on the main climate signals and resulting temperature reconstructions. Carbon isotope series show strong correlations with summer temperature and precipitation. A summer temperature reconstruction (1448–2007 AD) reveals that the Little Ice Age was characterised by low, but not extremely low temperatures on Corsica. Temperatures have been to modern temperatures at around 1500 AD. The reconstruction reveals warm summers during 1480–1520 and 1950–2007 AD and cool summers during 1580–1620 and 1820–1890 AD.},
author = {Szymczak, Sonja and Joachimski, Michael and Bräuning, Achim and Hetzer, Timo and Kuhlemann, Joachim},
doi = {10.5194/cp-8-1737-2012},
faupublication = {yes},
journal = {Climate of the Past},
note = {UnivIS-Import:2015-03-09:Pub.2012.nat.dgeo.IGM.LG.a560yr},
pages = {1737-1749},
peerreviewed = {Yes},
title = {{A} 560 yr summer temperature reconstruction for the {Western} {Mediterranean} basin based on stable carbon isotopes from {Pinus} nigra ssp. laricio ({Corsica}/{France}).},
url = {http://www.clim-past.net/8/1737/2012/},
volume = {8},
year = {2012}
}
@article{faucris.120007404,
author = {Richards, B. C. and Nikolaeva, S. V. and Kulagina, E. I. and Alekseev, A. S. and Gorozhanina, E. N. and Gorozhanin, V. M. and Konovalova, V. A. and Goreva, N. V. and Joachimski, Michael and Gatovsky, Y. A.},
doi = {10.1134/S0869593817070036},
faupublication = {yes},
journal = {Stratigraphy and Geological Correlation},
keywords = {ammonoids; conodonts; foraminifers; GSSP; Lochriea ziegleri; Serpukhovian; South Urals; Viséan},
pages = {697-758},
peerreviewed = {Yes},
title = {{A} candidate for the {Global} {Stratotype} {Section} and {Point} at the base of the {Serpukhovian} in the {South} {Urals}, {Russia}},
volume = {25},
year = {2017}
}
@book{faucris.122083764,
abstract = {During the Global Taghanic Biocrisis (c. 385 Ma), Middle Devonian faunas worldwide underwent extinction. In the biocrisis type region, the northern Appalachian Basin, biodiversity changes occurred through three bioevents that ultimately resulted in the loss of numerous endemic taxa. Carbon isotope excursions during this biocrisis have been documented in various stratigraphic successions, but never in the type region. Herein, we reconstruct changes in δC from the biocrisis type region and compare these changes to local faunal transitions. An approximately 1.5‰ negative excursion corresponds to the first bioevent, a time of inferred global warming and replacement of most endemic taxa of the mid-palaeolatitude Appalachian Basin by invasive palaeoequatorial taxa. An approximately 2‰ positive excursion is associated with the second bioevent, recognized as a return of the endemic fauna and the loss of invasive taxa. This positive excursion occurs near the Polygnathus ansatus-Ozarkodina semialternans zonal boundary and is recognized elsewhere. Faunal cosmopolitanism associated with the third bioevent corresponds with an inflection in the carbon isotope record from negative to positive trending values, which agrees with a positive carbon record excursion seen elsewhere at the semialternans-Schmidtognathus hermanni zonal boundary. This new carbon isotope record provides an important reference for recognizing this biocrisis in other areas and facies.},
doi = {10.1144/SP423.7},
editor = {Zambito, James J. and Joachimski, Michael and Brett, Carlton E. and Baird, Gordon C. and Aboussalam, Z. Sarah},
faupublication = {yes},
pages = {223-233},
publisher = {Geological Society of London},
series = {Special Publication},
title = {{A} carbonate carbon isotope record for the late {Givetian} ({Middle} {Devonian}) {Global} {Taghanic} {Biocrisis} in the type region (northern {Appalachian} {Basin})},
volume = {423},
year = {2016}
}
@article{faucris.124047704,
abstract = {During the uppermost Carboniferous and lowermost Permian algal mounds were formed in inner shelf settings of the Carnic Alps (Austria/Italy). A specific mound type, characterized by the dominance of the dasyclad green alga Anthracoporella was studied in detail with regard to geometry, relationship between mound and intermound rocks, composition of the sediment, biota and diagenetic criteria. The two meter-sized mounds studied, occur within depositional sequences of transgressive systems tracts in the Lower Pseudoschwagerina Limestones (uppermost Gzhelian) at the flank of the Schulterkofel. The mounds consist of an Anthracoporella core facies with a sponge-crust boundstone facies at the base and at the top. The massive limestones of the Anthracoporella core facies exhibit abundant algal tufts and bushes, frequently in life position. The limestones of the intermound facies represented by thin-bedded bioclastic wackestones and packstones with abundant phylloid algae underlie and overlie the mounds. Intercalations of intermound beds within the mound facies indicate sporadic disruption of mound growth. Onlapping of intermound beds on steep mound flanks indicate rapid stabilization and lithification of mound flanks and the existence of a positive paleorelief. Asymmetrical shape of the mounds may be current controlled. Mound and intermound biota differ in the prevailing algae but are relatively similar with regard to associated foraminifera. Conspicuous differences concern bioerosion and biogenic encrustations. Both are high in intermound areas but low in the Anthracoporella core facies. The mounds show no ecological zonation. The mounds grew by in-place accumulation of disintegrated algal material and trapped bioclastic material between erect algal thalli. The comparison of the various Anthracoporella mounds demonstrates that almost each mound had ist own history. Establishing a general model for these mounds is a hazardous venture.},
author = {Joachimski, Michael and et al.},
author_hint = {Krainer K., Flügel E., Vachard D, Joachimski Michael},
faupublication = {yes},
journal = {Facies},
keywords = {Algae (Anthracoporella); Algal reefs; Carnic Alps (Austria); Facies analysis; Late Carboniferous; Reef mounds; Smaller foraminifera},
pages = {325-350},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{A} close look at {Late} {Carboniferous} {Algal} {Mounds}: {Schulterkofel}, {Carnic} {Alps}, {Austria}.},
year = {2003}
}
@article{faucris.106931924,
abstract = {The Reef Ridge deposit is a typical supergene "nonsulfide" zinc mineralization, located in the Yukon-Koyukuk region of west-central Alaska (USA). It is hosted in sedimentary rocks of the Farewell terrane, a continental fragment sandwiched between the Siberian and Laurentian cratons during the early Paleozoic. The mineralization occurs in Lower-Middle Devonian shallowwater dolomite of a Paleozoic carbonate platform succession belonging to the Nixon Fork tectonic unit. The mineralization consists of oxidized minerals associated with minor remaining sulfides (pyrite/marcasite and sphalerite). In the oxidation zone, smithsonite is the predominant mineral, mixed with Fe- (hydr)oxides (goethite and hematite). A complete petrographic and mineralogical study was performed. Samples were analyzed by X-ray diffraction, inductively coupled plasma-mass spectrometry and emission spectrometry, energy dispersive scanning electron microscopy, and QEMSCAN®( quantitative evaluation of minerals by scanning electron microscopy). The most abundant mineral in the nonsulfide ore is smithsonite. Similar to other nonsulfide Zn deposits worldwide, the first generation of smithsonite has replaced both primary sphalerite and the host carbonates. A second smithsonite generation precipitated as cement in vugs, cavities, and fractures. Minorzinc amounts also occur in the Fe-(hydr) oxides, and zinc traces have been identified in clay minerals. The carbon and oxygen isotope values of smithsonite at Reef Ridge vary from -0.7 to 2.1% relative to Vienna Peedee belemnite (VPDB) and 19.1% to 21.9% relative to Viennastandard mean ocean water (VSMOW). The δC values are similar to those of the host rock, suggesting that the predominant carbon source for smithsonite was the host carbonates, with only a limited contribution from organic carbon. The oxygen isotope ratios of Reef Ridge smithsonite are more depleted in O compared to supergene nonsulfides from other parts of the world formed under warm-humid, temperate, or semiarid climates. The oxygen isotope fractionation between water and smithsonite, which relates the δO value of the mineralizing solution, the formation temperature of smithsonite, and its δO composition, indicates that the δO composition of Reef Ridge smithsonite is related to very low formation temperatures (~10 °C), and strong depletion in O of the precipitating waters. The δO smithsonite composition, the strong O depletion, and the relationship of the formation of the Reef Ridge nonsulfide deposit with the development of the Sleetmute upland surface (which started in the Late Tertiary and continues to the present) indicate that the formation of the Reef Ridge nonsulfide deposit is probably related to cold/humid weathering episodes during a period comprised between Late Tertiary and Holocene. The "traditional" interpretation on the genesis of Zn nonsulfide deposits in warmhumid, temperate, or semiarid conditions should be questioned where other climate zones are indicated.},
author = {Santoro, L. and Boni, M. and Mondillo, N. and Joachimski, Michael and Woodman, J.},
doi = {10.1130/B31219.1},
faupublication = {yes},
journal = {Geological Society of America Bulletin},
pages = {1534-1549},
peerreviewed = {Yes},
title = {{A} cold supergene zinc deposit in {Alaska}: {The} {Reef} {Ridge} case},
volume = {127},
year = {2015}
}
@article{faucris.119303624,
author = {Jiang, Haishui and Joachimski, Michael and Wignall, Paul B. and Zhang, Muhui and Lai, Xulong},
doi = {10.1016/j.palaeo.2015.10.002},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Bianyang; Conodont; End-Permian extinction; South China},
pages = {690-695},
peerreviewed = {Yes},
title = {{A} delayed end-{Permian} extinction in deep-water locations and its relationship to temperature trends ({Bianyang}, {Guizhou} {Province}, {South} {China})},
volume = {440},
year = {2015}
}
@article{faucris.111866084,
author = {Racki, Grzegorz and Joachimski, Michael and Morrow, Jared R.},
doi = {10.1016/j.palaeo.2008.04.030},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
note = {UnivIS-Import:2015-03-09:Pub.2008.nat.dgeo.IGM.LG.amajor},
pages = {127-129},
peerreviewed = {Yes},
title = {{A} major perturbation of the global carbon budget in the {Early}-{Middle} {Frasnian} transition ({Late} {Devonian}).},
volume = {269},
year = {2008}
}
@article{faucris.218669316,
author = {Sun, Yadong and Zulla, M. J. and Joachimski, Michael and Bond, D. P.G. and Wignall, P. B. and Zhang, Z. T. and Zhang, M. H.},
doi = {10.1016/j.epsl.2019.04.036},
faupublication = {yes},
journal = {Earth and Planetary Science Letters},
keywords = {ammonium ocean; Early Triassic; nitrogen cycle; ocean anoxic event},
pages = {211-222},
peerreviewed = {Yes},
title = {{Ammonium} ocean following the end-{Permian} mass extinction},
volume = {518},
year = {2019}
}
@article{faucris.108636924,
abstract = {The Central European Basin is very suitable for high-resolution multistratigraphy of Late Permian to Early Triassic continental deposits. Here the well exposed continuous transition of the lithostratigraphic Zechstein and Buntsandstein Groups of Central Germany was studied for isotope-chemostratigraphy (δC, δC, δO), major and trace element geochemistry, magnetostratigraphy, palynology, and conchostracan biostratigraphy. The analysed material was obtained from both classical key sections (abandoned Nelben clay pit, Caaschwitz quarries, Thale railway cut, abandoned Heinebach clay pit) and a recent drill core section (Caaschwitz 6/2012) spanning the Permian-Triassic boundary. The Zechstein–Buntsandstein transition of Central Germany consists of a complex sedimentary facies comprising sabkha, playa lake, aeolian, and fluvial deposits of predominantly red-coloured siliciclastics and intercalations of lacustrine oolitic limestones. The new data on δC range from − 28.7 to − 21.7 ‰ showing multiple excursions. Most prominent negative shifts correlate with intercalations of oolites and grey-coloured clayey siltstones, while higher δC values correspond to an onset of palaeosol overprint. The δC values range from − 9.7 to − 1.3 ‰ with largest variations recorded in dolomitic nodules from the Zechstein Group. In contrast to sedimentary facies shifts across the Zechstein-Buntsandstein boundary, major element values used as a proxy (CIA, CIA*, CIA-K) for weathering conditions indicate climatic stability. Trace element data used for a geochemical characterization of the Late Permian to Early Triassic transition in Central Germany indicate a decrease in Rb contents at the Zechstein-Buntsandstein boundary. New palynological data obtained from the Caaschwitz quarry section reveal occurrences of Late Permian palynomorphs in the Lower Fulda Formation, while Early Triassic elements were recorded in the upper part of the Upper Fulda Formation. The present study confirms an onset of a normal-polarized magnetozone in the Upper Fulda Formation of the Caaschwitz quarry section supporting an interregional correlation of this crucial stratigraphic interval with the normal magnetic polarity of the basal Early Triassic known from marine sections in other regions. Based on a synthesis of the multistratigraphic data, the Permian-Triassic boundary is proposed to be placed in the lower part of the Upper Fulda Formation, which is biostratigraphically confirmed by the first occurrence date of the Early Triassic Euestheria gutta-Palaeolimnadiopsis vilujensis conchostracan fauna. Rare records of conchostracans reported from the siliciclastic deposits of the lower to middle Zechstein Group may point to its potential for further biostratigraphic subdivision of the Late Permian continental deposits.},
author = {Scholze, Frank and Wang, Xu and Kirscher, Uwe and Kraft, Johannes and Schneider, Jörg W. and Götz, Annette E. and Joachimski, Michael and Bachtadse, Valerian},
doi = {10.1016/j.gloplacha.2017.03.004},
faupublication = {yes},
journal = {Global and Planetary Change},
keywords = {Biostratigraphy; Central Germany; Conchostraca; Isotope geochemistry; Magnetostratigraphy; Major and trace elements},
pages = {129-151},
peerreviewed = {Yes},
title = {{A} multistratigraphic approach to pinpoint the {Permian}-{Triassic} boundary in continental {depositsThe} {Zechstein}–{Lower} {Buntsandstein} transition in {Germany}},
volume = {152},
year = {2017}
}
@article{faucris.106204384,
author = {Bond, David P. G. and Wignall, Paul B. and Joachimski, Michael and Savov, Ivan and Grasby, Stephen E. and Beauchamp, Benoit and Blomeier, Dierk P. G. and Sun, Yadong and Sun, Yadong},
doi = {10.1130/B31216.1},
faupublication = {yes},
journal = {Geological Society of America Bulletin},
pages = {1411-1421},
peerreviewed = {Yes},
title = {{An} abrupt extinction in the {Middle} {Permian} ({Capitanian}) of the {Boreal} {Realm} ({Spitsbergen}) and its link to anoxia and acidification},
volume = {127},
year = {2015}
}
@article{faucris.118317584,
author = {Bergstroem, Stig M. and Lehnert, Oliver and Calner, Mikael and Joachimski, Michael},
doi = {10.1080/11035897.2012.657231},
faupublication = {yes},
journal = {GFF},
keywords = {δ 13C chemostratigraphy; Borenshult fauna; Guttenberg excursion; Hirnantian excursion; Middle and Upper Ordovician; regional correlation},
pages = {39-63},
peerreviewed = {Yes},
title = {{A} new upper {Middle} {Ordovician}-{Lower} {Silurian} drillcore standard succession from {Borenshult} in {Östergötland}, southern {Sweden}: 2. {Significance} of δ {13C} chemostratigraphy},
volume = {134},
year = {2012}
}
@article{faucris.209063134,
author = {Hoffmann, René and Riechelmann, Sylvia and Ritterbush, Kathleen A. and Koelen, Jennifer and Lübke, Nathalie and Joachimski, Michael and Lehmann, Jens and Immenhauser, Adrian},
doi = {10.1016/j.gr.2018.10.011},
faupublication = {yes},
journal = {Gondwana Research},
keywords = {Lower Cretaceous; Madagascar; Geochemistry; Shell morphology and ultrastructure; Paleoceanography; Paleoecology},
pages = {64-81},
peerreviewed = {Yes},
title = {{A} novel multiproxy approach to reconstruct the paleoecology of extinct cephalopods},
volume = {67},
year = {2019}
}
@article{faucris.118279524,
abstract = {Carbon isotope data collected from five Frasnian-Famennian boundary sections in central Europe show two positive δ13C excursions in the late Frasnian (~367 Ma). Both anomalies coincided with the deposition of the bituminous lower and upper Kellwasser horizons. The carbon isotope patterns indicate two phases of enhanced burial and subsequent recycling of organic carbon. A maximum formation of warm saline waters on the subtropical to tropical epicontinental shelves during late Frasnian transgressive episodes may have induced oceanic oxygen deficits. Variations in the Corg burial rates may have resulted in changes in the CO2 concentrations in the oceans and in the atmosphere, culminating in global climatic changes. It is proposed that the repeated co-occurrences of sea-level fluctuations, anoxic conditions, and global climatic changes during the late Frasnian would affect especially the subtropical to tropical shallow-water communities and reef ecosystems, which were severely affected during the Frasnian-Famennian faunal crisis. -Authors},
author = {Joachimski, Michael and Buggisch, Werner},
doi = {10.1130/0091-7613(1993)021<0675:AEITLF>2.3.CO;2},
faupublication = {yes},
journal = {Geology},
note = {UnivIS-Import:2015-03-05:Pub.1993.nat.dgeo.IGM.LG.anoxic},
pages = {675-678},
peerreviewed = {Yes},
title = {{Anoxic} events in the late {Frasnian} - causes of the {Frasnian}-{Famennian} faunal crisis.},
year = {1993}
}
@article{faucris.112603744,
abstract = {Stable carbon and oxygen isotopes in tree rings are considered as reliable climate archives as they provide past environmental information with high resolution. However, recent studies have shown that isotope chronologies may reveal a long-term age trend and be influenced by non-climatic factors as other tree-ring parameters as well. These trends can only be identified in chronologies measured on individual trees but not on pooled sample chronologies consisting of several trees. In order to test whether pooled chronologies from pine trees from the Island of Corsica (Mediterranean/France) can be used for climatic reconstructions, we compared calculated mean values from 5 individual trees with pooled chronologies from the same 5 individuals. Carbon and oxygen isotope chronologies for a 50-year interval with annual resolution and 400 years with decadal resolution were analysed in order to document secular changes in inter-tree variability and to test for age related trends in the isotope ratios. Pooled carbon and oxygen isotope series correspond well to chronologies based on mean values calculated from analyses of individual trees. Inter-tree variability in oxygen isotope ratios is higher than in carbon isotope ratios but remains relatively constant over time. Similarities between the isotope series of individual trees are stronger over the 400-year time scale documenting a common long-term signal in the isotope values. No long-term age related trends are observed. Oxygen isotope values of the juvenile phase are characterised by a remarkable decrease over 40–50 years, interpreted to be related to the less developed root system of the young trees. This age effect can be avoided by not considering the first 50 years from the chronologies. Our results confirm that pooled carbon and oxygen isotope chronologies from Pinus nigra can be used for environmental reconstructions without statistical detrending.},
author = {Szymczak, Sonja and Joachimski, Michael and Bräuning, Achim and Hetzer, Timo and Kuhlemann, Joachim},
doi = {10.1016/j.chemgeo.2012.03.013},
faupublication = {yes},
journal = {Chemical Geology},
keywords = {Tree rings; Carbon isotopes; Oxygen isotopes; Pooling; Age trend; Pinus nigra ssp. laricio},
note = {UnivIS-Import:2015-03-09:Pub.2012.nat.dgeo.IGM.LG.arepoo},
pages = {40-49},
peerreviewed = {Yes},
title = {{Are} pooled tree ring {δ13C} and {δ18O} series reliable climate archives? — {A} case study of {Pinus} nigra spp. laricio ({Corsica}/{France}).},
url = {http://www.sciencedirect.com/science/article/pii/S0009254112001386},
volume = {308-309},
year = {2012}
}
@article{faucris.106159064,
abstract = {Conodont biogenic apatite has become a preferred analytical target for oxygen isotope studies investigating ocean temperature and palaeoclimate changes in the Palaeozoic. Despite the growing application in geochemically-based palaeoenvironmental reconstructions, the paucity or absence of conodont fossils in certain facies necessitates greater flexibility in selection of robust oxygen-bearing compounds for analysis. Vertebrate microfossils (teeth, dermal denticles, spines) offer a potential substitute for conodonts from the middle Palaeozoic. Vertebrate bioapatite is particularly advantageous given a fossil record extending to the present with representatives across freshwater to fully marine environments, thus widening the scope of oxygen isotope studies on bioapatite. However, significant tissue heterogeneity within vertebrates and differential susceptibility of these tissues to diagenetic alteration have been raised as potential problems affecting the reliability of the oxygen isotope ratios as palaeoclimatic proxies. Well-preserved vertebrate microfossils and co-occurring conodont fossils from the Upper Devonian and Lower Carboniferous of the Lennard Shelf, Canning Basin, Western Australia, were analysed using bulk (gas isotope ratio mass spectrometry, GIRMS) and in-situ (secondary ion mass spectrometry, SIMS) methodologies, with the latter technique allowing investigation of specific tissues within vertebrate elements. The δO results may be interpreted in terms of palaeolatitudinally and environmentally sensible palaeo-salinity and -temperature and provide a baseline standard for comparison against vertebrate microfossil δO values. Despite an absence of obvious diagenetic modification, GIRMS of vertebrate denticles yielded δO values depleted in O by 2–4‰ relative to co-occurring conodonts. SIMS analysis of dentine tissues exhibited significant heterogeneity, while hypermineralised tissues in both scales and teeth produced δO values comparable with those of associated conodonts. The susceptibility of permeable phosphatic fossil tissues to microbial activity, fluid interaction and introduction of mineral precipitates post-formation is demonstrated in the dentine of vertebrate microfossils, which showed significant heterogeneity and consistent depletion in O relative to conodonts. The hypermineralised tissues present in both teeth and scales appear resistant to many diagenetic processes and indicate potential for palaeoclimatic reconstructions and palaeoecological investigations.},
author = {Roelofs, Brett and Barham, Milo and Cliff, John and Joachimski, Michael and Martin, Laure and Trinajstic, Kate},
doi = {10.1016/j.palaeo.2016.10.018},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Apatite; GIRMS; Histology; Oxygen-isotopes; SIMS; Temperature},
pages = {79-92},
peerreviewed = {Yes},
title = {{Assessing} the fidelity of marine vertebrate microfossil {δ18O} signatures and their potential for palaeo-ecological and -climatic reconstructions},
volume = {465},
year = {2017}
}
@article{faucris.112406844,
abstract = {Many examples of drifted Aturia shells in shallow littoral deposits have been reported worldwide, suggesting that the paleobiogeographic distribution of this Cenozoic nautilid could be a mere post-mortem artifact. An exceptional Lower Miocene deposit from the Central Paratethys yields abundant (about 500 specimens) and very well-preserved newly hatched as well as adult shells, associated with upper and lower jaws, representing the first unequivocal case of autochthonous Aturia and one of the most exceptional nautilid deposits reported so far. Oxygen isotope ratios show that Aturia lived like Nautilus, being nektobenthic at all stages of its development. But unlike Nautilus, both newly hatched and adult Aturia lived at the same water depth and temperature (about 240-330. m and 13-17.6°C) in which the eggs were laid. The dysoxic paleoenvironmental setting in which Aturia occurs in abundance may be interpreted in light of both the capacity of Nautilus to exploit/tolerate oxygen-depleted waters, and the molecular phylogenetic tree of cephalopods, suggesting plesiomorphic physiological traits associated with hypoxia tolerance. Since the last common ancestor of Aturia and Nautilus may be traced back at least into the Jurassic, this sheds new light onto the relative scarcity of Mesozoic and Cenozoic nautilids in well-oxygenated, epicontinental shelf deposits. © 2011 Elsevier B.V.},
author = {Schloegl, Jan and Chirat, Regis and Baiter, Vincent and Joachimski, Michael and Hudackova, Natalia and Quillevere, Frederic},
doi = {10.1016/j.palaeo.2011.05.037},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Aturia; Cephalopoda; Foraminifera; Hypoxia; Miocene; Paleotemperatures; Stable isotopes},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LG.aturia},
pages = {330-338},
peerreviewed = {Yes},
title = {{Aturia} from the {Miocene} {Paratethys}: an exceptional window on nautilid habitat and lifestyle.},
volume = {308},
year = {2011}
}
@article{faucris.115598604,
author = {Joachimski, Michael and et al.},
author_hint = {Racki G., Matyja H., Racka M., Joachimski Michael},
faupublication = {yes},
journal = {Przeglad Geologiczny},
note = {UnivIS-Import:2015-03-05:Pub.1999.nat.dgeo.IGM.LG.biostr},
pages = {369-372},
peerreviewed = {unknown},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Biostratygraficzne} i geochemizne problemy identyfikacji granicy fran-famen w poludniowej {Polsce}.},
year = {1999}
}
@article{faucris.123965644,
abstract = {Boron isotope composition of marine carbonates has been proposed as a paleo-pH proxy and potential tool to reconstruct atmospheric pCO. The precise knowledge of the boron isotopic composition of ancient seawater represents the fundamental prerequisite for any paleo-pH reconstruction. This contribution presents boron isotope values for Silurian to Permian brachiopod calcite that might be used to reconstruct pH or boron isotope composition of past oceans. All brachiopod shells were screened for diagenetic recrystallization by means of cathodoluminescence microscopy, trace element geochemistry (B, Fe, Mn, Sr) as well as SEM. Only nonluminescent shells revealing well-preserved microstructures, high strontium and boron concentrations as well as low iron and manganese contents were accepted for boron isotope analysis. The boron isotope ratios of Silurian, Devonian, Pennsylvanian and Permian brachiopod calcite range from 6.8 to 11.0‰, 7.3 to 14.9‰, 12.4 to 15.8‰ and 10.1 to 11.7‰, respectively. These δB values are significantly lower in comparison to δB values of modern biogenic carbonates and indicate that the Paleozoic oceans were depleted in B by up to 10‰. Box modeling of the boron geochemical cycle suggests that the significant depletion of B in the oceanic reservoir may have been initiated by an enhanced continental boron discharge. Our data support the earlier made conclusion that boron isotopes may not be used in the geological past as reliable paleo-pH proxy unless the boron isotopic composition of ancient oceans can be constrained by further studies. Copyright © 2005 Elsevier Ltd.},
author = {Joachimski, Michael and van Geldern, Robert and et al.},
author_hint = {Joachimski M., Simon L., van Geldern R., Lécuyer C.},
doi = {10.1016/j.gca.2004.11.017},
faupublication = {yes},
journal = {Geochimica Et Cosmochimica Acta},
pages = {4035-4044},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Boron} isotope geochemistry of {Paleozoic} brachiopod calcite: {Implications} for a secular change in the boron isotope geochemistry of seawater over the {Phanerozoic}},
volume = {69},
year = {2005}
}
@article{faucris.121121264,
abstract = {Within the silidelastic dominated red-bed strata of the Early Devonian Wood Bay Formation, various types of calcareous deposits, characterised by specific sedimentary structures, lithologies, microfacies, carbonate contents and stable isotope signatures, occur at different stratigraphie levels. Pedogenic, nodular calcretes with a thickness from 40 to 150 centimetres, associated with alluvial-plain and overbank sediments, represent palaeosol (calcisols, aridisols) development. The massive nodules show an internal mudstone fabric, calcium carbonate concentrations from 64 to 87 % and carbon and oxygen signatures of-5.3 to -6.4 and -8.5 to -9.9 ‰, respectively. It is likely that they reflect a bio-induced carbonate precipitation in an oxygenated near-surface setting, connected with the evaporation of ground water. Single, up to some decimetres thick beds of calcareous mudstones and marls are characterised by a gradual colour change from reddish-brown to grey-violet upwards, and a meshwork of desiccation cracks at the top. The sediments show calcium carbonate concentrations from 22 to 43 % and carbon and oxygen isotope values ranging from -0.6 to -0.7 ‰ and -7.6 to -8.8 ‰, respectively. They are interpreted as deposits of relatively small, ephemeral lakes, formed by inorganic carbonate precipitation due to the evaporation of surface water. Individual beds and regressive, shallowing-upward sequences, up to a few metres thick, formed of calcareous mudstones to sandstones, marls to calcarenites and argillaceous to sandy limestones represent the depositional products of perennial, low-relief, low-energy lakes, These sediments yield carbonate concentrations from 20 to 81 % and a stable isotope composition of-2.1 to -3.1 %o for δC and -9.5 to -10.9 ‰ for δO. They reflect deposition in basinal and littoral lacustrine and palustrine sub-environments, in which carbonate was formed due to inorganic, bio-induced and biotic precipitation. The different types of calcareous deposits formed under arid to semi-arid climatic conditions in various sub-environments of alluvial plains and perennial lakes. Their occurrence at different stratigraphie levels within the Wood Bay Formation can be related to a gradually increasing geomorphologic maturity of the terrestrial basin. The latter was marked by a decrease of the topographic relief and a lowering of sedimentation rates. An increase in landscape stability, combined with a general water-level rise led to the recurrent formation of broad lake plains in the centre of the basin.},
author = {Joachimski, Michael and et al.},
author_hint = {Blomeier D., Wisshak M., Joachimski M., Freiwald A., Volohonsky E.},
faupublication = {yes},
journal = {Norwegian Journal of Geology},
pages = {281-298},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Calcareous}, alluvial and lacustrine deposits in the {Old} {Red} {Sandstone} of central north {Spitsbergen} ({Wood} {Bay} {Formation}, {Early} {Devonian})},
url = {https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33748692040&origin=inward},
volume = {83},
year = {2003}
}
@article{faucris.288796162,
abstract = {The Early Devonian witnessed dramatic changes in climate, ocean chemistry and faunal evolution. However, previous studies have relied mainly on records from North America and Europe (Prague Basin, Carnic Alps) and Australia, while data from China have been rarely reported, hindering robust δ13Ccarb chemostratigraphic correlation and evidence for the global significance of these events. Here, we report new carbon isotope and conodont apatite oxygen isotope records from the Alengchu section in western Yunnan which represents the most continuous Lower Devonian carbonate succession in China. Our study reports two positive δ13Ccarb excursions (Klonk isotope event, Lochkovian–Pragian isotope event) that can be correlated with published records globally. However, δ18Oapatite values are higher compared to coeval data from other sections. These higher values are interpreted as indicating cooler surface water temperatures as consequence of a persistent upwelling system at low latitudes which is consistent with the paleooceanographic circulation pattern reconstructed from combined evidence of climate modelling and geographic distribution of marine benthic ostracod assemblages.},
author = {Chen, Bo and Zhang, Mei Qiong and Qie, Wen Kun and Liang, Kun and Lu, Jian Feng and Joachimski, Michael and Ma, Xue Ping},
doi = {10.1016/j.palwor.2022.12.010},
faupublication = {yes},
journal = {Palaeoworld},
keywords = {Klonk isotope event; Lhasa Block; Lochkovian–Pragian isotope event; South China block; Upwelling},
note = {CRIS-Team Scopus Importer:2023-02-03},
peerreviewed = {unknown},
title = {{Carbon} and conodont apatite oxygen isotope records from the {Alengchu} section in western {Yunnan} and their paleoclimatic and paleogeographic implications},
year = {2023}
}
@article{faucris.117380824,
abstract = {The Guadalupian-Lopingian (G-L) boundary (260.4Ma) is one of the major extinction events in Earth history that coincides with the Emeishan Large Igneous Province and palaeoclimatic changes. Carbon isotopes of whole rock samples were studied in order to document changes in the global carbon cycle. In contrast to earlier studies, we observe no major negative excursion in δ13C in the middle Capitanian. A positive δ13C excursion is observed in the latest Capitanian with a 1.5% increase registered in the J. xuanhanensis Zone to C. postbitteri hongshuiensis Subzone, followed by a decrease of 1% within the C. postbitteri postbitteri Subzone and a 2% decrease in the C. dukouensis to C. asymmetrica Zone. Oxygen isotopes of conodonts from two G-L boundary sections were measured in order to reconstruct conodont habitat and potential changes in water temperature. Oxygen isotope ratios of gondolellid conodonts are higher in comparison to oxygen isotope ratios measured on hindeodid conodonts suggesting that gondollelids lived in cooler and thus deeper waters compared with hindeodids. The oxygen isotope record reconstructed from gondollelid conodonts suggests warming of water temperatures of about 4°C in the late Capitanian (J. postserrata to J. granti Zone), cooling of about 6 to 8°C across the G-L boundary and in the earliest Wuchiapingian, and again significant warming in the Wuchiapingian (C. dukouensis to C. liangshanensis Zone). The temperature increase can be correlated with the main phase of Emeishan volcanism suggesting that climatic warming may have resulted in an intensified hydrological cycle, fertilisation of the oceans and enhanced primary productivity, the latter documented in the positive late Capitanian carbon isotope excursion. However, changes in sea-level seem to parallel reconstructed water temperatures suggesting that changes in water depth in combination with superimposed climatic changes may be responsible for the observed temperature changes. This study documents that oxygen isotope studies on Permian conodonts should be performed on mono-generic conodont samples and that oxygen isotopes not only provide valuable palaeoclimatic information but also may help to constrain the life habitat of conodonts. © 2011 Elsevier B.V.},
author = {Chen, Bo and Joachimski, Michael and Sun, Yadong and Shen, Shuzhong and Lai, Xulong and Sun, Yadong},
doi = {10.1016/j.palaeo.2011.08.016},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Carbon and oxygen isotopes; Conodont; Guadalupian; Lopingian; Palaeoclimate},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LG.carbon},
pages = {145-153},
peerreviewed = {Yes},
title = {{Carbon} and conodont apatite oxygen isotope records of {Guadalupian}-{Lopingian} boundary sections: {Climatic} or sea-level signal?},
volume = {311},
year = {2011}
}
@article{faucris.265709162,
abstract = {The largest mass extinction since the advent of animals occurred during the Permian-Triassic (P-Tr) transition, ca. 252 Ma, and is commonly attributed to the eruption of the Siberian Traps large igneous province. However, the direct killing mechanism is still debated. In this study, we investigated marine redox conditions of the intermediate water column that most organisms inhabit with special attention to the time interval before the onset of the mass extinction. The carbon isotope composition of carbonate and organic carbon (δ13Ccarb and δ13Corg) as well as the nitrogen isotope composition of bulk nitrogen (δ15N) were analyzed in four P-Tr boundary sequences (Zhongli, Jianshi, Ganxi, and Chaotian sections), which record a transect from a shallow water carbonate platform to a deep water, lower ramp slope in South China. δ13Ccarb shows a distinct negative shift in all sections and displays a clear, 2−4‰, decreasing gradient accompanying an increase in water depth both before and after the mass extinction. A distinct negative shift in δ15N is observed in the shallow water Zhongli section, whereas a minor negative shift is present in the three deeper water sections. Before the mass extinction, the δ15N values from shallow water sections are higher than those from deeper waters. The low δ15N values close to 0‰ in deeper water sections suggest that microbial nitrogen fixation was the predominant source of biologically available nitrogen before the onset of the mass extinction. Thus, the water depth- dependent gradient in δ13Ccarb and δ15N suggests that an oxygen-deficient intermediate water column was already present before the mass extinction. The uniform δ15N values around 0‰ accompanying the onset of the mass extinction reveal that anoxic intermediate waters expanded into shallow waters. Meanwhile, the distinct positive shift in δ13Corg observed in upper ramp slope sections, i.e., the Jianshi and Ganxi sections, suggests that a euxinic photic zone was at least episodically present in the earliest Triassic. The temporal coincidence between the expansion of intermediate water column anoxia and the onset of the P-Tr mass extinction supports the hypothesis that marine anoxia was a direct killing mechanism.},
author = {Wu, Baojin and Luo, Genming and Joachimski, Michael and Wignall, Paul and Lei, Lidan and Huang, Junhua and Lai, Xulong},
doi = {10.1130/B36005.1},
faupublication = {yes},
journal = {Geological Society of America Bulletin},
pages = {1397-1413},
peerreviewed = {Yes},
title = {{Carbon} and nitrogen isotope evidence for widespread presence of anoxic intermediate waters before and during the {Permian}-{Triassic} mass extinction},
volume = {134},
year = {2022}
}
@article{faucris.274361837,
abstract = {The order Heterocorallia is an enigmatic, anatomically distinct group of calcifying Palaeozoic corals with unclear affinities to other, either extinct or modern cnidarian lineages. Here, we present results of microstructure and stable isotope studies on exceptionally well-preserved skeletons of two species of the heterocoral Oligophylloides from the Famennian (Upper Devonian) of the Anti-Atlas, Morocco and the Holy Cross Mountains, Poland. The investigations provide new information on the skeletogenesis and isotope fractionation effects in Palaeozoic heterocorals. In order to estimate the possible role of diagenetic alteration on the observed carbon and oxygen isotope ratios, we have conducted several preservation tests, including transmitted-light, scanning-electron, fluorescence and cathodoluminescence microscopy, Raman spectroscopy, and trace element analyses. The least- and most-altered skeleton portions identified based on this approach are typified by clearly different isotopic signatures. The least-altered parts of the specimens reveal carbon and oxygen isotope ratios close to those of contemporaneous marine-equilibrated calcites. The moderately-pronounced, positive correlations between the δ13C and δ18O values observed for these coralla may reflect relatively minor vital fractionation effects, obscured to some degree by diagenetic overprint. The results suggest that the isotope fractionation mechanisms of the heterocorals differed markedly from the significant kinetic fractionation characteristic of the modern scleractinian corals. Rather, the moderate, if any, extent of non-equilibrium fractionation during skeletogenesis in the Heterocorallia resembled the typical, environmental and metabolic CO2-dominated fractionation effects shown by most other marine calcifiers. These include the extinct rugose corals, modern hydrocorals and, in particular, modern octocorals, with which the heterocorals show notable architectural and structural similarities.
18O and δ13C values of well-defined stratigraphic units range from -2.4‰ to -5.9‰ and -1‰ to +8‰, respectively. We observed parallel trends in the carbon and oxygen isotope curves, with the most prominent shifts occurring in the Lower Wenlock, Upper Wenlock and Middle Ludlow. Average δ18O values (-2.4‰ to -2.9‰) recorded in the Middle Ludlow are among the highest δ18O values reported for the Early Palaeozoic. The recorded δ18O variations cannot solely be explained by changes in sea surface temperature and salinity. The variations in the isotopic signals correlate negatively with changes in sea level. Heavy carbon and oxygen signals coincide with sea-level lowstands, whereas light signals are recorded during sea-level highstands. Sea-level highstands were probably characterized by the formation of warm saline waters on subtropical epicontinental shelves, inducing oxygen-deficiency in the basins (alumshale facies). The low δ18O values are attributed to 18O depletion in surface waters owing to the storage of 18O-enriched saline waters in the basins. Low δ13C values are explained by a low surface water productivity, since nutrients were not supplied to the photic zone but rather stored in the deeper ocean. During sea-level lowstands, colder waters that formed in higher latitudes may have represented the main intermediate water source. A better ventilation of the basins is documented by the deposition of well-aerated sediments. Whereas the high δ18O values are explained by the change in oceanic circulation, the high δ13C values are attributed to an enhanced primary productivity and possibly to an enhanced burial of Corg. The model discussed here may provide an attractive scenario for accounting for the recorded short-term variations in the isotopic signals, without the necessity of introducing an isotopic correction factor for Silurian sea water.},
author = {Wenzel, Bernd and Joachimski, Michael},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
note = {UnivIS-Import:2015-03-05:Pub.1996.nat.dgeo.IGM.LG.carbon},
pages = {143-166},
peerreviewed = {Yes},
title = {{Carbon} and oxygen isotopic compositions of {Silurian} brachiopods ({Gotland}/{Sweden}): {Palaeoceanographic} implications.},
volume = {122},
year = {1996}
}
@article{faucris.117331544,
abstract = {The Katian (Upper Ordovician) facies succession of the Siljan district, central Sweden, records some of the most prominent environmental changes in the Ordovician of Baltoscandia. These changes include two separate phases of major sea-level drawdown that were of basinwide and presumably global importance. The first regression and lowstand terminated an entire generation of carbonate mud mounds (the Kullsberg Limestone) and resulted in the formation of polymict carbonate conglomerates (Skålberg Limestone) belonging to the Amorphognathus superbus Zone. New stable isotope data from the Amtjärn quarry shows that this is immediately after the peak of the Guttenberg Carbon Isotope Excursion (GICE), which reaches a δ13C peak value at 3. 3‰ in the uppermost Amorphognathus tvaerensis Conodont Zone. A second major regression and sea-level lowstand is manifested by palaeokarst morphologies in the Slandrom Limestone, which formed close in time to the comparably minor Waynesville positive carbon excursion in the basal Amorphognathus ordovicicus Conodont Zone. The widespread exposure associated with this latter lowstand terminated carbonate production in much of the basin, and, during the subsequent flooding, organic-rich, graptolitic shale formed across most of Baltoscandia. The two corresponding sequence boundaries are amalgamated at the top of truncated carbonate mud mounds in the Siljan district, resulting in a pronounced Middle Katian hiatus in the immediate mound areas. © 2009 Springer-Verlag.},
author = {Calner, Mikael and Lehnert, Oliver and Joachimski, Michael},
doi = {10.1007/s10347-009-0192-6},
faupublication = {yes},
journal = {Facies},
keywords = {Black shale; Conglomerates; GICE; Glaciation; Katian; Siljan district; Sweden},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LG.carbon},
pages = {157-172},
peerreviewed = {Yes},
title = {{Carbonate} mud mounds, conglomerates and sea-level history in the {Katian} ({Upper} {Ordovician}) of central {Sweden}},
volume = {56},
year = {2010}
}
@article{faucris.111998084,
abstract = {At Hancock Summit West, Nevada, western USA, uppermost Givetian (upper Middle Devonian) and lower and middle Frasnian (lower Upper Devonian) rocks of the lower Guilmette Formation include, in stratigraphic sequence, carbonate-platform facies of the conodont falsiovalis, transitans, and punctata Zones; the type Alamo Breccia Member of the middle punctata Zone; and slope facies of the punctata and hassi Zones. The catastrophically deposited Alamo Breccia and related phenomena record the ~ 382 Ma Alamo event, produced by a km-scale bolide impact into a marine setting seaward of an extensive carbonate platform fringing western North America. Re-evaluation of conodonts from the lower Guilmette Formation and Alamo Breccia Member, together with regional sedimentologic and conodont biofacies comparisons, now firmly locates the onset of the Johnson et al. (1985) transgressive-regressive (T-R) cycle IIc, which occurred after the start of the punctata Zone, within a parautochthonous megablock low in the Alamo Breccia. Whole-rock carbon isotope analyses through the lower Guilmette Formation and Alamo Breccia Member reveal two positive δ13Ccarb excursions: (1) a small, 3‰ excursion, which is possibly correlative with the falsiovalis Event previously identified from sections in Western Europe and Australia, occurs below the breccia in the Upper falsiovalis Zone to early part of the transitans Zone; and (2) a large, multi-part excursion, dominated by a 6‰ positive shift, begins above the start of the punctata Zone and onset of T-R cycle IIc and continues above the Alamo Breccia, ending near the punctata- hassi zonal boundary. This large excursion correlates with the punctata Event, a major positive δ13C excursion previously recognized in eastern Laurussia and northern Gondwana. Consistent with previous studies, at Hancock Summit West the punctata Event is apparently not associated with any regional extinctions or ecosystem reorganizations. In the study area, onset of the main punctata Event began after the start of both the punctata Zone and T-R cycle IIc, and preceded the Alamo impact by less than 650 k.y., as inferred from conodont biochronologic and regional rock-accumulation rate estimates. Although complicated by the heterolithic, high-energy deposits of the Alamo Breccia, the carbon isotope record of the breccia and post-breccia beds does not indicate a major impact-correlative perturbation to the carbon cycle. This study extends recognition of the punctata Event to western Laurussia, further reinforcing the potential global scale of the event and its potential importance to understanding early to middle Frasnian marine geochemistry and palaeoenvironments. Based on previous models and our observations, increased tectonic activity, increased nutrient flux to oceans, increased marine bioproductivity, widespread anoxia, and increased organic carbon burial were all likely key factors in driving the punctata Event excursion. Furthermore, periodic eustatic and regional relative sea-level rises may have played an important role in promoting organic carbon burial and in maintaining a link between the primary open-marine geochemical signal and that recorded on the shallow-marine, lower Guilmette carbonate platform. © 2009 Elsevier B.V. All rights reserved.},
author = {Morrow, J. R. and Sandberg, C. A. and Malkowski, K. and Joachimski, Michael},
doi = {10.1016/j.palaeo.2009.08.016},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Alamo Breccia, Nevada; Carbon isotope chemostratigraphy; Early Late Devonian; Early to middle Frasnian; Punctata Event},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LG.carbon},
pages = {105-118},
peerreviewed = {Yes},
title = {{Carbon} isotope chemostratigraphy and precise dating of middle {Frasnian} (lower {Upper} {Devonian}) {Alamo} {Breccia}, {Nevada}, {USA}},
volume = {282},
year = {2009}
}
@article{faucris.262170115,
abstract = {We present a 13Ccarb chemostratigraphy for the Late Ordovician Hirnantian Stage based on 208 whole-rock samples from six outcrops in the Oslo-Asker district, southern Norway. Our data include the Norwegian type section for the Hirnantian Stage and Ordovician-Silurian boundary at Hovedøya Island. The most complete record of the Hirnantian Isotope Carbon Excursion (HICE) is identified in a coastal exposure at Konglungø locality where the preserved part of the anomaly spans a c. 24 m thick, mixed carbonate-siliciclastic succession belonging to the upper Husbergøya, Langåra and Langøyene formations and where 13Ccarb peak values reach c. +6 ‰. Almost the entire HICE occurs above beds containing the Hirnantia Fauna, suggesting a latest Hirnantian age for the peak of the excursion. The temporal development of the HICE in southern Norway is associated with substantial shallowing of depositional environments. Sedimentary facies and erosional unconformities suggest four inferably fourth-order glacio-eustatically controlled sea-level lowstands with successively increased exposure and erosion to the succession. The youngest erosional unconformity is related to the development of incised valleys and resulted in cut-out of at least the falling limb of the HICE throughout most of the Oslo-Asker district. The fill of the valleys contains the falling limb of the HICE, and the postglacial transgression therefore can be assigned to the latest part of the Hirnantian Age. We address the recent findings of the chitinozoan Belonechitina gamachiana in the study area and its relationship to the first occurrence of Hirnantia Fauna in the studied sections, challenging identification of the base of the Hirnantian Stage.},
author = {Calner, Mikael and Bockelie, Johan Fredrik and Rasmussen, Christian M.Ø. and Calner, Hanna and Lehnert, Oliver and Joachimski, Michael},
doi = {10.1017/S0016756821000546},
faupublication = {yes},
journal = {Geological Magazine},
keywords = {brachiopods; glaciation; HICE; Hovedøya; incised valley; Konglungø; oolite},
note = {CRIS-Team Scopus Importer:2021-07-30},
peerreviewed = {Yes},
title = {{Carbon} isotope chemostratigraphy and sea-level history of the {Hirnantian} {Stage} (uppermost {Ordovician}) in the {Oslo}-{Asker} district, {Norway}},
year = {2021}
}
@article{faucris.120094304,
abstract = {Carbon isotope records for inorganic and total organic carbon (TOC) as well as for individual organic biomarkers show two positive excursions in the Late Frasnian with comparable shape and amplitude in δ13C. The positive shifts in δ13C can be correlated with the deposition of the Kellwasser horizons. The inorganic carbon isotope excursions are explained by an enhanced organic carbon burial that is expected to lower the concentration of oceanic dissolved CO2. TOC δ13C values do not exhibit a larger shift than that recorded by inorganic carbon δ13C values; this is unexpected since a decrease in the dissolved CO2 concentration should result in lower carbon isotope fractionation during photosynthesis (εp). δ13C values of presumed algal biomarkers (low-molecular-weight n-alkanes, pristane, phytane), although offset by ∼2.5‰, exhibit essentially identical records as TOC, and confirm this unexpected result. It is proposed that high atmospheric and oceanic CO2 concentrations during the Devonian resulted in maximum photosynthetic fractionation. Any change in the CO2 concentration would thus not affect εp. As such, δ13C of primary organic carbon and δ13Ccarb will exhibit parallel excursions. The data imply that carbon isotopes and the relationship between εp and [CO2] will not be effective to study changes in pCO2 levels during the Devonian since CO2 concentrations were too high. © 2002 Elsevier Science B.V. All rights reserved.},
author = {Buggisch, Werner and Joachimski, Michael and Ostertag-Henning, Christian and Pancost, Richard and Freeman, Katherine},
doi = {10.1016/S0031-0182(01)00474-6},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Carbon isotopes; Late Devonian; Mass extinction; Photosynthetic fractionation},
note = {UnivIS-Import:2015-03-09:Pub.2002.nat.dgeo.IGM.LG.carbon},
pages = {91-109},
peerreviewed = {Yes},
title = {{Carbon} isotope geochemistry of the {Frasnian}-{Famennian} transition},
volume = {181},
year = {2002}
}
@article{faucris.106770224,
abstract = {Stable isotope records of demosponges from the Caribbean and Coral Sea are described for the purpose of studying the influence of fossil fuel CO on the carbon isotopic composition of dissolved inorganic carbon (DIC) in surface water. The slow-growing sponges precipitate calcium carbonate in isotopic equilibrium with ambient sea water and are used to detect changes in δC from pre-industrial times (early 19th century) to the present. We observed similar shapes and ranges in δC curves measured on Caribbean specimens collected from water depths of 25, 84 and 91 m as well as a specimen collected in shallow waters off New Caledonia. The records reveal a highly significant correlation with atmospheric δC. δC values for Caribbean and Coral Sea surface waters were calculated using the δC sponge records. While δC of atmospheric CO decreased by about 1.4‰ from the early 19th century to 1990, δC of Caribbean and Coral Sea surface waters decreased by 0.9 ± 0.2‰ and 0.7 ± 0.3‰, respectively. No isotopic equilibrium between surface water DIC and atmospheric CO was observed, either during the pre-industrial steady state or during the last 100 years. The lower amount of depletion in the surface water δC with respect to the atmospheric anthropogenic signal is explained by the dilution of the surface waters by biologically altered subsurface water DIC. The lower δC decrease in the Coral Sea points to a stronger influence of the subsurface water source compared to the Caribbean.},
author = {Joachimski, Michael and et al.},
author_hint = {Böhm F., Joachimski M., Lehnert H., Morgenroth G., Kretschmer W., Vacelet J., Dullo W.},
doi = {10.1016/0012-821X(96)00006-4},
faupublication = {yes},
journal = {Earth and Planetary Science Letters},
keywords = {C-13; Caribbean Sea; Coral Sea; Demospongea},
pages = {291-303},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Carbon} isotope records from extant {Caribbean} and {South} {Pacific} sponges: {Evolution} of {δ13C} in surface water {DIC}},
volume = {139},
year = {1996}
}
@article{faucris.120980464,
abstract = {Carbonate rocks of the Rhenohercynian and Saxothuringian zones of the Variscan Mountains, Prague Syncline, Carnic Alps, Montagne Noire, Pyrenees, and Cantabrian Mountains were investigated for δ13Ccarb. The values were measured on bulk carbonate, selected carbonate components and cements. Many of the studied carbonates are interpreted to exhibit primary marine δ13C values with only some showing evidence of diagenetic alteration. A δ13C curve is presented for the entire Devonian time interval. Positive δ13C excursions are documented in the woschmidti-postwoschmidti, sulcatus, kitabicus, Upper serotinus, kockelianus, Middle varcus, falsiovalis, Upper rhenana, linguiformis to Middle triangularis, and Middle to Upper praesulcata conodont Zones. Some excursions are recorded worldwide and interpreted to be of global significance as e.g. at the Silurian-Devonian and Frasnian-Famennian boundaries. Some of the others are described for the first time from Central and Southern Europe, and their global nature has to be verified by further investigations. Most δ13C excursions coincide with sea-level changes and the deposition of black shales. A coupling of changes in sea-level, weathering intensity, nutrient supply, organic carbon production, and climate is assumed as driving force of the carbon isotope excursions. © 2006 Elsevier B.V. All rights reserved.},
author = {Buggisch, Werner and Joachimski, Michael},
doi = {10.1016/j.palaeo.2006.03.046},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Bio-events; Black shale; Cantabrian Mountains; Carbon isotopes; Carnic Alps; Devonian; Montagne Noire; Prague Syncline; Rhenohercynian; Saxothuringian},
note = {UnivIS-Import:2015-03-09:Pub.2006.nat.dgeo.IGM.LG.carbon},
pages = {68-88},
peerreviewed = {Yes},
title = {{Carbon} isotope stratigraphy of the {Devonian} of {Central} and {Southern} {Europe}.},
volume = {240},
year = {2006}
}
@article{faucris.120987064,
abstract = {Devonian brachiopod shells from North America, Spain, Morocco, Siberia, China and Germany were analysed for δ13C, δ18O and 87Sr/86Sr. The samples were screened for diagenetic alteration by means of cathodoluminescence, trace element chemistry (Sr, Mn, Fe) and scanning electron microscopy. 409 out of 1678 shells ranging from the middle Emsian to the middle Famennian were accepted as well-preserved. 87Sr/86Sr ratios start with values of 0.70860 in the Lochkovian and decline continuously to 0.70782 at the Emsian-Eifelian boundary. This decrease is attributed to a reduced riverine strontium flux caused by the termination of the Caledonian orogeny. For the Eifelian and Givetian, relatively uniform values between 0.70782 and 0.70784 are observed. 87Sr/86Sr ratios start to rise again in the late Givetian and reach a value of 0.70807 in the early Famennian. An enhanced continental delivery of strontium as consequence of tectonic uplift due to the Eovariscan orogeny, in combination with climatic warming, as suggested by the δ18O record, is interpreted to be responsible for the shift to more radiogenic strontium isotope values. The carbon isotope curve shows four positive δ13C excursions with amplitudes ranging from + 2.0‰ and + 3.5‰. The positive excursion observed in the australis Zone coincides with the deposition of the Bakoven black shale in New York state. The δ13C excursion near the Eifelian-Givetian boundary is correlated with the Kacàk event while the two positive excursions in the late Frasnian and at the Frasnian-Fammenian transition are contemporaneous with the deposition of the Kellwasser horizons. All carbon isotope excursions are interpreted to be the result of increased burial of organic carbon. The oxygen isotope record reveals short-term excursions in the late Givetian, late Frasnian and at the Frasnian-Famennian transition which are interpreted to result from changes in surface water temperature. The long-term evolution in δ18O shows values of - 2.8‰ to - 3.5‰ in the Early and Middle Devonian to generally lower δ18O values between - 4.3‰ and - 6.1‰ in the latest Givetian and Late Devonian. Assuming a δ18O of Devonian seawater of - 1‰ V-SMOW, Early and Middle Devonian δ18O values translate into realistic palaeotemperatures (24 to 27 °C) for tropical to subtropical latitudes. In contrast, the δ18O values of Late Devonian brachiopods indicate a shift to unrealistically warm palaeotemperatures (31 to 41 °C). The change in δ18O of brachiopod calcite cannot be explained solely by a change in temperature, pH or by a secular decrease in δ18O of seawater. A combination of climatic warming and a moderate decrease in δ18O of seawater from the Middle to Late Devonian may account for the observed decrease in δ18O of brachiopod calcite. However, this tentative interpretation is not confirmed by conodont apatite δ18O data that translate into warm but realistic Late Devonian palaeotemperatures. © 2006 Elsevier B.V. All rights reserved.},
author = {Joachimski, Michael and van Geldern, Robert and et al.},
author_hint = {Van Geldern R. , Joachimski Michael, Day J., Jansen U., Alvarez F., Yolkin E.A., Ma X.P.},
doi = {10.1016/j.palaeo.2006.03.045},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Brachiopods; Carbon isotopes; Devonian; Oxygen isotopes; Strontium isotopes},
note = {UnivIS-Import:2015-03-09:Pub.2006.nat.dgeo.IGM.LG.carbon{\_}0},
pages = {47-67},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Carbon}, oxygen and strontium isotope records of {Devonian} brachiopod shell calcite.},
volume = {240},
year = {2006}
}
@article{faucris.111216204,
abstract = {Pelagic deposits at Abadeh represent a complete biostratigraphic record across the Permian/Triassic boundary (PTB). The presumed water depth during deposition of these sediments was between 60 and 90 m. Similar to other Permian/Triassic boundary sections, the succession at Abadeh is characterised by a negative carbon isotope shift of approximately 4‰. The values start to decrease in the lower C. changxingensis - C. deflecta s.l. Zone, reach -0.12‰ (V-PDB) in the uppermost Permian just below the PTB, remain low to the early I. isarcica Zone (-0.32‰) and increase subsequently in the upper I. isarcica Zone. For the time interval of the PTB negative carbon isotope excursion, between the C. iranica and the I. isarcica Zones, no correlation exists between the δ13Ccarb δ18Ocarb. The above observations argue against the conclusion of Heydari et al. (2001) that the carbon isotope event at the P/T transition is an alteration artefact and not a global signal. The decrease in δ13Ccarb is accompanied by a ∼5‰ (and potentially up to 10‰) increase in δ34SSSS. Together, these features are thought to reflect a complex global event, notably the development of widespread anoxic oceans with anoxic bottom layers rising onto the shelves. For the carbon isotope drop, other factors, such as the collapse of ocean primary productivity may also have played a role. The 87Sr/86Sr ratios of Dzhulfian seawater show only a minor increase from 0.70705 to 0.70710, reaching 0.70720 in the Dorashamian. The increase becomes steeper in the Early Triassic reaching 0.70754 in the N. dieneri Zone. The rise of the strontium isotope values is thought to be related to enhanced continental weathering under humid climatic conditions in the uppermost Permian (C. meishanensis - H. praeparvus one) and the lack of a dense land vegetation in the Early Triassic, prior to the Spathian (Upper Olenekian). © Springer-Verlag 2004.},
author = {Joachimski, Michael and et al.},
author_hint = {Korte C., Kozur H.W., Schwark L., Joachimski Michael, Strauss H., Veizer J},
doi = {10.1007/s00531-004-0406-7},
faupublication = {yes},
journal = {International Journal of Earth Sciences},
keywords = {Abadeh (Iran); Carbon isotopes; Oxygen isotopes; Permian/Triassic boundary; Strontium isotopes; Sulfur isotopes},
note = {UnivIS-Import:2015-03-09:Pub.2004.nat.dgeo.IGM.LG.carbon},
pages = {26-45},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Carbon}, sulfur, oxygen and strontium isotope records, organic geochemistry and biostratigraphy across the {Permian}/{Triassic} boundary in {Abadeh}, {Iran}},
year = {2004}
}
@article{faucris.232902296,
abstract = {The Carnian–Norian (C–N) transition (Late Triassic) has long been postulated as an interval of major climatic changes, though the nature of such changes and their ecological impact remains largely unexplored. We use oxygen isotopes measured on monogeneric conodont assemblages (δ18OPO4) from the Canadian Cordillera to trace seawater temperature evolution at the western margin of Pangea and in the allochthonous Wrangellia Terrane. Different conodont taxa show conspicuous offsets in δ18OPO4, suggesting that they had preferential habitat depths and genus-specific temperature corrections must be applied. Thus, δ18OPO4 from the Williston Lake sections indicates low mid-latitude sea surface temperatures (SSTs) ranging from ∼28 to 35 °C, favouring a generally warm Late Triassic climate scenario. The parvus Subzone of C–N transition, which marks the peak faunal turnover, records major climatic perturbations: SSTs peaking at ∼34 °C then decreasing to ∼29 °C. This is followed by a quick temperature rebound and a second pulse of cooling from 33 to 27 °C in the asymmetrica-Norigondolella Subzone, marking the coldest temperatures in the ∼20 Myr study interval. A secular warming trend towards the late Norian reinstated after the transient cooling in the earliest Norian, coinciding with reef expansions in the Late Triassic. The middle–late Norian (Alaunian 3–Sevatian 1) represents a hothouse climate comparable to the Paleocene–Eocene Thermal Maximum and its warmth supressed both diversity and origination rates of reef-building biota. Early Norian δ18OPO4 data from Frederick Island, Haida Gwaii (part of the Wrangellia Terrane) are more depleted in 18O compared to coeval samples from the Black Bear Ridge, indicating ∼3–5 °C warmer temperatures than the Laurentian epicontinental sea. The temperature difference supports a more southern, probably sub-equatorial position for at least part of the Wrangellia Terrane during the earliest Norian.},
author = {Sun, Yadong and Orchard, M. J. and Kocsis, T. and Joachimski, Michael},
doi = {10.1016/j.epsl.2020.116082},
faupublication = {yes},
journal = {Earth and Planetary Science Letters},
keywords = {faunal turnovers; Late Triassic; palaeoceanography; palaeothemometry; reef development; Wrangellia Terrane},
note = {CRIS-Team Scopus Importer:2020-01-31},
peerreviewed = {Yes},
title = {{Carnian}–{Norian} ({Late} {Triassic}) climate change: {Evidence} from conodont oxygen isotope thermometry with implications for reef development and {Wrangellian} tectonics},
volume = {534},
year = {2020}
}
@article{faucris.111387584,
author = {Joachimski, Michael and et al.},
author_hint = {Halfar J., Steneck R. , Schöne B., Moore K., Joachimski Michael, Kronz A., Fietzke J., Estes J.},
faupublication = {yes},
journal = {Journal of Geophysical Research F: Earth Surface},
note = {UnivIS-Import:2015-03-09:Pub.2007.nat.dgeo.IGM.LG.centur},
pages = {doi:10.1029/2006GL028811},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Century}-long record of climate change in the subarctic {North} {Pacific} {Ocean}},
volume = {L07702},
year = {2007}
}
@article{faucris.123704284,
abstract = {Oxygen isotope ratios (δO) of biogenic apatite have become a widely used tool for reconstructing palaeoenvironmental conditions in the past. Ongoing improvements in secondary ion mass spectrometry (SIMS) technology have made in situ δO analyses on sub-nanogram domains within single microfossil samples possible; however this method requires calibration with reference materials (RMs) with a matrix “similar” to that of the samples. Here we evaluated five sources of gem-quality, abiogenic apatites to assess their potentials as SIMS RMs. Our results show that all these gem-quality apatites are low-REEs calcium fluorapatites with δO values between 6.6 and 11.4‰. Large variations in δO have been found for between crystals from a single deposit as well as within individual crystals. Durango apatite has an inter-crystal δO range of 4.4‰ (6.6–11.0‰, N = 9 crystals). Madagascar Green apatite, Madagascar 1st Mine apatite and Ipira apatite have inter-crystal variations in δO of 4.1‰ (7.3–11.4‰, N = 15 crystals), 3.5‰ (7.6–11.1‰, N = 9 crystals) and 3.1‰ (7.1–10.2‰, N = 11 crystals), respectively. South Africa Blue apatite has a smaller inter-crystal δO range of only 0.9‰ (8.7–9.6‰, N = 6 crystals), though this might be an artefact due to the restricted number of samples studied. Intra-crystal δO variations of studied crystals generally range from 0.8 to 1.8‰. However, several gem apatite crystals from Madagascar have minor δO variation within 0.5‰ and represent most promising candidate RM. Gem-quality abiogenic apatites can be used as RMs for calibrating SIMS δO analyses, however these require homogeneity testing at sub-millimetre scale in advance. Durango crystals, commonly used as RMs in earlier SIMS-based studies, display a conspicuous heterogeneity in δO, with intra-crystal variations ranging from 0.7 to 2‰ as detected by both gas source isotope ratio mass spectrometry and large geometry SIMS. Thus, Durango apatite cannot be considered as suitable for SIMS calibration and alternative reference materials need to be sought.},
author = {Sun, Yadong and Wiedenbeck, Michael and Joachimski, Michael and Beier, Christoph and Kemner, Fabian and Weinzierl, Christoph},
doi = {10.1016/j.chemgeo.2016.07.013},
faupublication = {yes},
journal = {Chemical Geology},
keywords = {Apatite; Durango; Oxygen isotope; Secondary ion mass spectrometry},
pages = {164-178},
peerreviewed = {Yes},
title = {{Chemical} and oxygen isotope composition of gem-quality apatites: {Implications} for oxygen isotope reference materials for secondary ion mass spectrometry ({SIMS})},
volume = {440},
year = {2016}
}
@article{faucris.124064204,
abstract = {Chemostratigraphy uses chemical fingerprints stored in sediments and sedimentary rocks for stratigraphic correlation. Stable isotope signatures fixed in sedimentary inorganic and organic matter are among the most powerful proxies used in chemostratigraphy. This contribution focuses on the use of oxygen and carbon isotope geochemistry in stratigraphy. The importance of oxygen isotope stratigraphy for paleoclimate research is documented in case study I. Oxygen isotope stratigraphy can be used to trace climate pulses through the last few million years. It serves also as a tool for reconstruction of multicentennial climate variations on a global scale. Case study II demonstrates how carbon isotope stratigraphy in Cretaceous successions is used for correlation between ammonite-dated sections and sections dated with magnetostratigraphy. Case study III focuses on the use of carbon isotope stratigraphy in the Palaeozoic. Carbon isotope studies have been intensively used in the Palaeozoic to unravel changes in the global carbon cycle and for chemostratigraphic correlation of sections from various palaeocontinents. However, diagenesis is a major concern since Palaeozoic carbonates may have been affected by recrystallisation and considerably higher temporal overprint in comparison to Mesozoic or Cenozoic carbonate sequences.},
author = {Weissert, Helmut and Joachimski, Michael and Sarnthein, Michael},
doi = {10.1127/0078-0421/2008/0042-0145},
faupublication = {yes},
journal = {Newsletters on Stratigraphy},
note = {UnivIS-Import:2015-03-09:Pub.2008.nat.dgeo.IGM.LG.chemos},
pages = {145-179},
peerreviewed = {Yes},
title = {{Chemostratigraphy}},
volume = {42},
year = {2008}
}
@article{faucris.310459903,
abstract = {The Drewer quarry located in the Rhenish Massif is a well-studied outcrop that comprises Upper Devonian (Famennian) to Lower Carboniferous (Viséan) strata. Within the Drewer deposits two black shale intervals have been described that are linked to two global oceanic anoxic events, the Hangenberg Event and the Lower Alum Shale Event. The black shales associated with the Middle Tournaisian Lower Alum Shale Event contain abundant phosphatic concretions, which were investigated using thin section petrography, powder X-ray diffraction, Fourier-transform infrared spectrometry and scanning electron microscopy. The concretions formed during several growth phases under anoxic and at least episodically sulphidic conditions within the sediment and served as a substrate for subsurface microbial mats that formed phosphatic microstromatolites. The microstromatolites occur either as partially branched columns of up to 600 μm in length attached to the phosphatic concretions or as smaller, bulbous aggregates surrounding the concretions. Element mapping identified the presence of pyrite and other metal sulphides within the phosphatic microstromatolites. The carbon and oxygen stable isotopic composition of phosphate-associated carbonate within the phosphatic microstromatolites suggests that the mat-forming microorganisms were probably anaerobic, chemotrophic microbial communities dwelling in the anoxic environment during the Lower Alum Shale Event. Such interpretation agrees with the deeper-water depositional setting of the Lower Alum Black Shale and its high content of organic matter, suggesting that chemotrophic microbial mats are potent agents of phosphogenesis in general, and of the formation of phosphatic stromatolites in particular.},
author = {Zwicker, Jennifer and Smrzka, Daniel and Gothieu, Matthias and Libowitzky, Eugen and Joachimski, Michael and Ernst Böttcher, Michael and Peckmann, Jörn},
doi = {10.1017/S0016756823000493},
faupublication = {yes},
journal = {Geological Magazine},
keywords = {Devonian-Carboniferous Boundary; Lower Alum Black Shale; phosphogenesis; Rhenish Massif; stromatolites},
note = {CRIS-Team Scopus Importer:2023-09-15},
peerreviewed = {unknown},
title = {{Chemotrophy}-based phosphatic microstromatolites from the {Mississippian} at {Drewer}, {Rhenish} {Massif}, {Germany}},
year = {2023}
}
@article{faucris.252983779,
abstract = {Results of conodont-based δ18Ophos studies from two core sections in Estonia (Mehikoorma-421 and Valga-10) indicate that the pre-Hirnantian Late Ordovician was characterized by a general cooling trend: a rapid climate cooling in the early Sandbian and a less intense cooling in the late Sandbian through Katian. During this time interval, sea-surface temperatures probably decreased by up to 9o C. This fits with earlier ideas of a colder Late Ordovician climate before the Hirnantian. On the background of general cooling trend in the pre-Hirnantian Late Ordovician, tendencies in the temperature changes were quite variable. Several episodes of SST decrease and increase of different magnitudes and durations are evident from the δ18Ophos curves in the studied sections. In the interval sampled in detail, 7 cooling events are recognized and tentatively called (in stratigraphical order): Early Kukruse, Haljala, Keila, Early Nabala, Vormsi, Early Pirgu and Middle Pirgu CE-s. Duration of these events and amplitudes of changes in seawater temperatures increased from Sandbian to late Katian. All cooling events may have triggered the waxing of polar and subpolar Gondwana icecaps and are reflected in the sedimentary succession by major sea-level lowstands recognized also outside the study region. Results of our research do not support a simple, straightforward correlation between temperature trends inferred from δ18Ophos measurements and changes in the δ13C record. Comparison of δ18Ophos and δ13C curves reveal that these two variables behave quite independently: in some intervals their trends fit quite well, in others they might show completely the opposite. For this comparison we provide also a new, detailed δ13C curve from the Valga-10 core section.},
author = {Männik, Peep and Lehnert, Oliver and Nõlvak, Jaak and Joachimski, Michael},
doi = {10.1016/j.palaeo.2021.110347},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Baltoscandia; Glaciation; Oxygen and carbon isotopes; Palaeoclimate; Sandbian–Katian},
note = {CRIS-Team Scopus Importer:2021-03-26},
peerreviewed = {Yes},
title = {{Climate} changes in the pre-{Hirnantian} {Late} {Ordovician} based on {δ18Ophos} studies from {Estonia}},
volume = {569},
year = {2021}
}
@inproceedings{faucris.119076804,
address = {Potsdam},
author = {Szymczak, Sonja and Joachimski, Michael and Bräuning, Achim and Hetzer, Timo and Kuhlemann, Joachim},
booktitle = {TRACE - Tree Rings in Archaeology, Climatology and Ecology, Vol. 10: Proceedings of the DENDROSYMPOSIUM 2011 Scientific Technical Report STR 12/03, GFZ Potsdam},
date = {2011-05-11/2011-05-14},
doi = {10.2312/GFZ.b103-12036},
editor = {Gärtner H., Rozenberg P., Montés P., Bertel O., Helle G., Heinrich I.},
faupublication = {yes},
note = {UnivIS-Import:2015-04-20:Pub.2011.nat.dgeo.IG.zentr.climat{\_}7},
pages = {54-59},
peerreviewed = {unknown},
publisher = {GFZ Potsdam},
title = {{Climate} signals in carbon isotope series from {Pinus} nigra ssp. laricio in {Corsica}},
url = {http://www.tree-ring.org/content/trace-vol-10-2012},
venue = {Orléans},
volume = {10},
year = {2012}
}
@article{faucris.121969804,
abstract = {The Carnian Humid Episode (CHE), also known as the Carnian Pluvial Event, and associated biotic changes are major enigmas of the Mesozoic record in western Tethys. We show that the CHE also occurred in eastern Tethys (South China), suggestive of a much more widespread and probably global climate perturbation. Oxygen isotope records from conodont apatite indicate a double-pulse warming event. The CHE coincided with an initial warming of 4 °C. This was followed by a transient cooling period and then a prolonged ~7 °C warming in the later Carnian (Tuvalian 2). Carbon isotope perturbations associated with the CHE of western Tethys occurred contemporaneously in South China, and mark the start of a prolonged period of carbon cycle instability that persisted until the late Carnian. The dry-wet transition during the CHE coincides with the negative carbon isotope excursion and the temperature rise, pointing to an intensification of hydrologic cycle activities due to climatic warming. While carbonate platform shutdown in western Tethys is associated with an influx of siliciclastic sediment, the eastern Tethyan carbonate platforms are overlain by deep-water anoxic facies. The transition from oxygenated to euxinic facies was via a condensed, manganiferous carbonate (MnO content up to 15.1 wt%), that records an intense Mn shuttle operating in the basin. Significant siliciclastic influx in South China only occurred after the CHE climatic changes and was probably due to foreland basin development at the onset of the Indosinian Orogeny. The mid-Carnian biotic crisis thus coincided with several phenomena associated with major extinction events: a carbonate production crisis, climate warming, δC oscillations, marine anoxia, biotic turnover and flood basalt eruptions (of the Wrangellia Large Igneous Province).},
author = {Sun, Yadong and Wignall, P. B. and Joachimski, Michael and Bond, D. P. G. and Grasby, S. E. and Lai, X. L. and Wang, L. N. and Zhang, Z. T. and Sun, S. and Sun, Yadong},
doi = {10.1016/j.epsl.2016.03.037},
faupublication = {yes},
journal = {Earth and Planetary Science Letters},
keywords = {Carbon isotopes; Carnian Humid Episode; Climate warming; Large igneous provinces; Marine anoxia; Wrangellia flood basalt},
pages = {88-100},
peerreviewed = {Yes},
title = {{Climate} warming, euxinia and carbon isotope perturbations during the {Carnian} ({Triassic}) {Crisis} in {South} {China}},
volume = {444},
year = {2016}
}
@article{faucris.116768784,
author = {Brigaud, Benjamin and Puceat, Emmanuelle and Pellenard, Pierre and Vincent, Benoit and Joachimski, Michael},
doi = {10.1016/j.epsl.2008.06.015},
faupublication = {yes},
journal = {Earth and Planetary Science Letters},
note = {UnivIS-Import:2015-03-09:Pub.2008.nat.dgeo.IGM.LG.climat},
pages = {58-67},
peerreviewed = {Yes},
title = {{Climatic} fluctuations and seasonality during the {Late} {Jurassic} ({Oxfordian}-{Early} {Kimmeridgian}) inferred from {d18O} of {Paris} {Basin} oyster shells.},
volume = {273},
year = {2008}
}
@article{faucris.112408824,
abstract = {The tropical, warm, and equable climate of the Jurassic world is regularly challenged by geoscientists, especially since oxygen isotopes (δ18O) of fossil hardparts have been used to reconstruct the paleotemperature history of seawater. By applying the innovative "SiZer" (significant zero crossings of the derivatives) statistical approach to a newly compiled δ18O database for the Jurassic, we demonstrate the occurrence of major and multiscale δ18O changes mainly related to climate disturbances. For the first time, two long-term anomalies in δ18O are identified during the Toarcian and the Late Jurassic, in conjunction with intensive volcanism in large igneous provinces. These results support a strong influence of repeated volcanic pulses on the modulation of pCO2, temperatures, and polar ice cap volumes over protracted periods. At shorter time scales, 13 relatively rapid (0.5-1 m.y.) and significant warming and cooling events are identified, the causes of which include transient fluctuations in greenhouse gas concentrations related to still-debated mechanisms. © 2011 Geological Society of America.},
author = {Dera, Guillaume and Brigaud, Benjamin and Monna, Fabrice and Laffont, Remi and Puceat, Emmanuelle and Deconinck, Jean-Francois and Pellenard, Pierre and Joachimski, Michael and Durlet, Christophe},
doi = {10.1130/G31579.1},
faupublication = {yes},
journal = {Geology},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LG.climat},
pages = {215-218},
peerreviewed = {Yes},
title = {{Climatic} ups and downs in a disturbed {Jurassic} world},
volume = {39},
year = {2011}
}
@article{faucris.112607924,
author = {Joachimski, Michael and Lai, Xulong and Shen, Shuzhong and Jiang, Haishui and Luo, Genming and Chen, Bo and Chen, Jun and Sun, Yadong and Sun, Yadong},
doi = {10.1130/G32707.1},
faupublication = {yes},
journal = {Geology},
note = {UnivIS-Import:2015-03-09:Pub.2012.nat.dgeo.IGM.LG.climat},
pages = {195-198},
peerreviewed = {Yes},
title = {{Climatic} warming in the latest {Permian} and the {Permian}-{Triassic} mass extinction.},
volume = {40},
year = {2012}
}
@article{faucris.112223804,
author = {Pätzold, Jürgen and Klemd, Reiner and Joachimski, Michael},
faupublication = {yes},
journal = {Zeitschrift für Angewandte Geologie},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.c3geoc.coasmi},
pages = {51-61},
peerreviewed = {Yes},
title = {co-{As} mineralization at the mining district {Bou} {Azzer}-{El} {Graara} {Inlier}, {Anti}-{Atlas}, {Morocco}.},
volume = {51/2},
year = {2010}
}
@article{faucris.124040884,
abstract = {We present a new multi-parameter dataset from Corsican black pine growing on the island of Corsica in the Western Mediterranean basin covering the period AD 1410-2008. Wood parameters measured include tree-ring width, latewood width, earlywood width, cell lumen area, cell width, cell wall thickness, modelled wood density, as well as stable carbon and oxygen isotopes. We evaluated the relationships between different parameters and determined the value of the dataset for climate reconstructions. Correlation analyses revealed that carbon isotope ratios are influenced by cell parameters determining cell size, whereas oxygen isotope ratios are influenced by cell parameters determining the amount of transportable water in the xylem. A summer (June to August) precipitation reconstruction dating back to AD 1185 was established based on tree-ring width. No long-term trends or pronounced periods with extreme high/low precipitation are recorded in our reconstruction, indicating relatively stable moisture conditions over the entire time period. By comparing the precipitation reconstruction with a summer temperature reconstruction derived from the carbon isotope chronologies, we identified summers with extreme climate conditions, i.e. warm-dry, warm-wet, cold-dry and cold-wet. Extreme climate conditions during summer months were found to influence cell parameter characteristics. Cold-wet summers promote the production of broad latewood composed of wide and thin-walled tracheids, while warm-wet summers promote the production of latewood with small thick-walled cells. The presented dataset emphasizes the potential of multi-parameter wood analysis from one tree species over long time scales. © 2014 Elsevier Ltd.},
author = {Szymczak, Sonja and Hetzer, Timo and Bräuning, Achim and Joachimski, Michael and Leuschner, Hanns-Hubert and Kuhlemann, Joachim},
doi = {10.1016/j.quascirev.2014.07.010},
faupublication = {yes},
journal = {Quaternary Science Reviews},
keywords = {Carbon isotopes; Climate reconstruction; Mediterranean; Oxygen isotopes; Pinus nigra; Tree ring anatomy},
note = {UnivIS-Import:2015-04-14:Pub.2014.nat.dgeo.IGM.LG.combin},
pages = {146-158},
peerreviewed = {Yes},
title = {{Combining} wood anatomy and stable isotope variations in a 600-year multi-parameter climate reconstruction from {Corsican} black pine},
url = {http://www.sciencedirect.com/science/article/pii/S0277379114002856},
volume = {101},
year = {2014}
}
@article{faucris.118376544,
abstract = {Oxygen isotope compositions of Silurian calcitic brachiopod shells from Gotland are compared with those of phosphatic inarticulate brachiopod shells and conodonts from identical stratigraphic horizons. The δO(phosphate) values of inarticulate brachiopod shells vary widely (13.0 to 17.5‰ V-SMOW) and are significantly lower than those of coeval conodont samples (17.5 to 19.5‰ V-SMOW). Conodont samples from individual beds have homogenous δO(phosphate) values with variations close to the analytical precision (±0.2‰). Together with a significant correlation of conodont δO(phosphate) and articulate brachiopod shell δO(carbonate) values (r = 0.85), this observation suggests that primary marine oxygen isotope compositions are better preserved in conodont apatite than in inarticulate brachiopod shell apatite. However, with decreasing δO(carbonate) values, the δO(phosphate) values of conodonts are higher than expected for theoretical isotopic equilibrium with brachiopod calcite. Different habitats of conodonts and brachiopods cannot account for the observed offset in δO because both organisms were thriving on a broad shallow marine carbonate platform. Whereas δO(phosphate) values of Silurian conodonts are close to δO(phosphate) values of modern and Mesozoic tropical biogenic apatites, most Silurian calcitic brachiopod shells from Gotland are depleted in O when compared to modern or Mesozoic brachiopods. We therefore suggest that Silurian conodonts from Gotland record paleotemperature and δO of Silurian sea water more faithfully than coeval calcitic brachiopod shells. Copyright (C) 2000 Elsevier Science Ltd.},
author = {Joachimski, Michael and et al.},
author_hint = {Wenzel Bernd, Lécuyer C., Joachimski Michael},
doi = {10.1016/S0016-7037(00)00337-9},
faupublication = {yes},
journal = {Geochimica Et Cosmochimica Acta},
note = {UnivIS-Import:2015-03-09:Pub.2000.nat.dgeo.IGM.LG.compar},
pages = {1859-1872},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Comparing} calcite and phosphate oxygen isotope paleothermometers - {d18O} of {Silurian} brachiopods and conodonts},
volume = {64},
year = {2000}
}
@article{faucris.111750584,
abstract = {Oxygen isotope compositions of Silurian calcitic brachiopod shells from Gotland are compared with those of phosphatic inarticulate brachiopod shells and conodonts from identical stratigraphic horizons. The δO(phosphate) values of inarticulate brachiopod shells vary widely (13.0 to 17.5‰ V-SMOW) and are significantly lower than those of coeval conodont samples (17.5 to 19.5‰ V-SMOW). Conodont samples from individual beds have homogenous δO(phosphate) values with variations close to the analytical precision (±0.2‰). Together with a significant correlation of conodont δO(phosphate) and articulate brachiopod shell δO(carbonate) values (r = 0.85), this observation suggests that primary marine oxygen isotope compositions are better preserved in conodont apatite than in inarticulate brachiopod shell apatite. However, with decreasing δO(carbonate) values, the δO(phosphate) values of conodonts are higher than expected for theoretical isotopic equilibrium with brachiopod calcite. Different habitats of conodonts and brachiopods cannot account for the observed offset in δO because both organisms were thriving on a broad shallow marine carbonate platform. Whereas δO(phosphate) values of Silurian conodonts are close to δO(phosphate) values of modern and Mesozoic tropical biogenic apatites, most Silurian calcitic brachiopod shells from Gotland are depleted in O when compared to modern or Mesozoic brachiopods. We therefore suggest that Silurian conodonts from Gotland record paleotemperature and δO of Silurian sea water more faithfully than coeval calcitic brachiopod shells. Copyright (C) 2000 Elsevier Science Ltd.},
author = {Joachimski, Michael and et al.},
author_hint = {Wenzel B., Lécuyer C., Joachimski M.},
doi = {10.1016/S0016-7037(00)00337-9},
faupublication = {yes},
journal = {Geochimica Et Cosmochimica Acta},
pages = {1859-1872},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Comparing} oxygen isotope records of {Silurian} calcite and phosphate-{δ18O} compositions of brachiopods and conodonts},
volume = {64},
year = {2000}
}
@article{faucris.110552464,
abstract = {The carbon isotopic composition of organic matter is reported for two Frasnian-Famennian boundary sections from the Rheinische Schiefergebirge (Germany). During the late Frasnian δ13C(org) values commonly range from -27.5‰ to -26‰. Highest δ13C(org) values around -24‰ are encountered immediately above and below the Kellwasser horizons. All samples from the Kellwasser horizons are depleted in δ13C(org) by -2.5‰ to -4.7‰. This depletion is explained by a higher proportion of biomass derived from isotopically depleted chemoautotrophic bacteria. A comparison of the positive δ13C excursions shows that the δ13C(org) shifts precede the 13C(carb) shifts by some 105 years. Consequently, Δδ13C values document a shift towards lower values below the Upper Kellwasser horizon. A contribution of terrestrial organic matter, as well as a thermal alteration of the δ13C(org) signals, do not provide compelling explanations for the earlier δ13C(org) shift. Increases in primary productivity or carbon burial rate will change the CO2(aq) content of surface waters, affect the carbon isotope fractionation during photosynthetic carbon uptake and thus enrich organic carbon in 13C. However, both processes cannot account for the earlier onset of the δ13C(org) shift, because the δ13C(carb) record should document the resulting 13C enrichment in surface waters as well. A reduction in the calcium carbonate precipitation rate, due to the global extinction of the reef ecosystem, may have played an important role in reducing the CO2(aq) content of surface waters without changing the isotopic composition of surface waters. Whether this process or other factors, such as a rise in sea-surface temperature or a change in the phytoplankton association, account for the earlier onset of the positive shift in the δ13C(org) curve must be determined by further studies that may be able to confirm the global significance of the reported δ13C(org) pattern in Frasnian-Famennian boundary sections from other parts of the globe.},
author = {Joachimski, Michael},
doi = {10.1016/S0031-0182(97)00051-5},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Carbon; Frasnian-Famennian; Germany; Isotopes; Organic carbon; Rheinisches Schiefergebirge (Rhenish Slate Mountains); Upper Devonian},
note = {UnivIS-Import:2015-03-05:Pub.1997.nat.dgeo.IGM.LG.compar},
pages = {133-146},
peerreviewed = {Yes},
title = {{Comparison} of organic and inorganic carbon isotope patterns across the {Frasnian}/{Famennian} boundary.},
year = {1997}
}
@article{faucris.112411684,
abstract = {Stable isotopes in tree rings have widely been used for palaeoclimate reconstructions since tree rings record climatic information at annual resolution. However, various wood components or different parts of an annual tree-ring may differ in their isotopic compositions. Thus, sample preparation and subsequent laboratory analysis are crucial for the isotopic signal retained in the final tree-ring isotope series used for climate reconstruction and must therefore be considered for the interpretation of isotope–climate relationships. This study focuses on wood of Corsican Pine trees (Pinus nigra ssp. laricio) as this tree species allows to reconstruct the long-term climate evolution in the western Mediterranean. In a pilot study, we concentrated on methodological issues of sample preparation techniques in order to evaluate isotope records measured on pooled whole tree-ring cellulose and whole tree-ring bulk wood samples. We analysed 80-year long carbon and oxygen chronologies of Corsican Pine trees growing near the upper tree line on Corsica. Carbon and oxygen isotope records of whole tree-ring bulk wood and whole tree-ring cellulose from a pooled sample of 5 trees were correlated with the climate parameters monthly precipitation, temperature and the self-calibrating Palmer Drought Severity Index (sc-PDSI). Results show that the offsets in carbon and oxygen isotopes of bulk wood and cellulose are not constant over time. Both isotopes correlate with climate parameters from late winter and summer. The carbon and oxygen isotope ratios of cellulose are more sensitive to climatic variables than those of bulk wood. The results of this study imply that extraction of cellulose is a pre-requisite for the reconstruction of high-resolution climate records from stable isotope series of P. nigra ssp. laricio.},
author = {Szymczak, Sonja and Joachimski, Michael and Bräuning, Achim and Hetzer, Timo and Kuhlemann, Joachim},
doi = {10.1016/j.dendro.2011.04.001},
faupublication = {yes},
journal = {Dendrochronologia},
keywords = {Pinus nigra ssp. laricio; Corsica},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LG.compar},
pages = {219-226},
peerreviewed = {Yes},
title = {{Comparison} of whole wood and cellulose carbon and oxygen isotope series from {Pinus} nigra ssp. laricio ({Corsica}/{France}).},
url = {http://www.sciencedirect.com/science/article/pii/S1125786511000257},
volume = {29},
year = {2011}
}
@article{faucris.209480424,
author = {Lehnert, Oliver and Eriksson, Magnus J and Calner, Mikael and Joachimski, Michael and Buggisch, Werner},
faupublication = {yes},
journal = {Acta Palaeontologica Sinica},
pages = {249-255},
peerreviewed = {Yes},
title = {{Concurrent} sedimentary and isotopic indications for global climatic cooling in the {Late} {Silurian}},
volume = {46},
year = {2007}
}
@article{faucris.106772864,
abstract = {Conodont faunas from the Wulankeshun section in the northwestern Junggar Basin of Xinjiang, NW China, are characterized by shallow-water assemblages with many endemic taxa. This study presents separate local icriodid and polygnathid conodont zonations for the Lower Member of the Hongguleleng Formation, which can only roughly be correlated with the pelagic "standard zonation". The basal beds of the Hongguleleng Formation are assigned to a low diverse Icriodus praealternatus ferus n. ssp. Zone, which possibly includes latest Frasnian strata but it continues into the basal Famennian. At present, the Frasnian/Famennian boundary cannot be defined unequivocally by conodonts and there are no obvious Upper Kellwasser equivalents. However, the carbon isotope data are comparable with the Bulongguor Reservoir stratotype, where the top-Frasnian lies within the basal Hongguleleng Formation. In the early Famennian, partly endemic icriodid lineages provide successive Icriodus cornutus, I. stenoancylus junggarensis n. ssp., and I. plurinodosus n. sp. (sub)zones. The basal Famennian is possibly marked by the oldest, endemic species of Neopolygnathus, Neo. huijunae n. sp. It is followed by local Neo. communis communis, "Polygnathus" pomeranicus, Po. cf. szulczewskii, and "Po." pseudocommunis n. sp. zones. The new local conodont zonations provide a high biostratigraphic resolution for further future studies. The Wulankeshun shallow-water conodont faunas show restricted similarities with contemporaneous faunas from eastern Europe, Kazakhstan, and Iran. There are a few taxa that were originally described from other distant regions, such as NW Canada and eastern Australia. The local high number of endemic taxa (17 (sub)species, 46%) points to a significant plate tectonic isolation of the Junggar Basin in the early Famennian.},
author = {Wang, Z. H. and Becker, R. T. and Aboussalam, Z. S. and Hartenfels, S. and Joachimski, Michael and Gong, Y. M.},
doi = {10.1016/j.palaeo.2015.12.029},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Carbon isotopes; Conodonts; Frasnian/Famennian; Junggar Basin; Late Devonian},
pages = {279-297},
peerreviewed = {Yes},
title = {{Conodont} and carbon isotope stratigraphy near the {Frasnian}/{Famennian} ({Devonian}) boundary at {Wulankeshun}, {Junggar} {Basin}, {NW} {China}},
volume = {448},
year = {2016}
}
@article{faucris.113113264,
author = {Chen, Bo and Joachimski, Michael and Shen, Shu-Zhong and Lambert, Lance L. and Lai, Xu-Long and Wang, Xiang-Dong and Chen, Jun and Yuan, Dong-Xun},
doi = {10.1016/j.gr.2012.07.007},
faupublication = {yes},
journal = {Gondwana Research},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LG.conodo{\_}6},
pages = {77-89.},
peerreviewed = {Yes},
title = {{Conodont} apatite oxygen isotope record of the {Permian}: ice volume and palaeotemperature evolution},
volume = {24},
year = {2013}
}
@article{faucris.110986084,
author = {Buggisch, Werner and Joachimski, Michael},
doi = {10.1130/0091-7613(2002)030<0711:CAOSIC>2.0.CO;2},
faupublication = {yes},
journal = {Geology},
keywords = {18O/16O; Apatite; Late Devonian; Mass extinction; Paleotemperature},
note = {UnivIS-Import:2015-03-09:Pub.2002.nat.dgeo.IGM.LG.conodo},
pages = {711-714},
peerreviewed = {Yes},
title = {{Conodont} apatite {δ18O} signatures indicate climatic cooling as a trigger of the {Late} {Devonian} mass extinction},
volume = {30},
year = {2002}
}
@article{faucris.106388964,
author = {Joachimski, Michael and Buggisch, Werner},
doi = {10.1130/0091-7613(2003)031<0384:>2.0.CO;2},
faupublication = {yes},
journal = {Geology},
peerreviewed = {Yes},
title = {{Conodont} apatite {δ18O} signatures indicate climatic cooling as a trigger of the {Late} {Devonian} mass extinction: {Reply}},
volume = {31},
year = {2003}
}
@article{faucris.209141684,
author = {Wu, Rongchang and Calner, Mikael and Lehnert, Oliver and Lindskog, Anders and Erlström, Mikael and Joachimski, Michael},
doi = {10.1080/11035897.2018.1435561},
faupublication = {yes},
journal = {GFF},
pages = {44-54},
peerreviewed = {Yes},
title = {{Conodont} biostratigraphy and carbon isotope stratigraphy of the middle {Ordovician} ({Darriwilian}) {Komstad} {Limestone} {Formation}, southern {Sweden}},
volume = {140},
year = {2018}
}
@article{faucris.107076244,
author = {Wu, Rong Chang and Calner, Mikael and Lehnert, Oliver and Lindskog, Anders and Joachimski, Michael},
doi = {10.1080/11035897.2018.1435561},
faupublication = {yes},
journal = {GFF},
keywords = {carbon isotope stratigraphy; conodont biostratigraphy; Darriwilian; Komstad Limestone; Middle Ordovician; Sweden},
pages = {1-11},
peerreviewed = {Yes},
title = {{Conodont} biostratigraphy and carbon isotope stratigraphy of the {Middle} {Ordovician} ({Darriwilian}) {Komstad} {Limestone}, southern {Sweden}},
year = {2018}
}
@article{faucris.107288544,
abstract = {This study characterizes the stratigraphical context as well as the palaeoenvironmental and sealevel trends during the Late Frasnian and Famennian in the Buschteich section (Thuringia, Germany). An integrated approach combines conodont biostratigraphy, chemostratigraphy based on carbon and oxygen isotopes, conodont biofacies analyses and investigations of the morphotypes of foraminifera that occur in the section was applied. Conodonts provided a fine-scale biostratigraphical framework. All the Famennian conodont biozones were identified, with the exception of the three lowest. The Frasnian-Famennian transition was further identified by a positive carbon isotope excursion. This continuous Famennian record is developed in a condensed limestone succession. The reddish Griotte facies, typical of strata of this period, were not documented. Black shales were not developed except for an interval of dark colored mud rocks corresponding to the Hangenberg event at the top of the section. The carbonate succession of Buschteich was deposited in an outer ramp environment, pelagic organisms are the dominant fauna. This is corroborated by the overall dominance of the deep-water conodont genus Palmatolepis. Microfacies, conodont biofacies and foramini - fera indicated a deepening trend from the Lower crepida to the Lower rhomboidea Zone, followed by a shallowing trend from the Upper rhomboidea to the praesulcata Zone. This sequence overall matches the sea level reference curve for Euramerica. The timing of maximum water depth at Buschteich, as well as the general sea-level reference record, differs from the Col des Tribes (Montagne Noire, France). Differential uplift or overprinting of the long-term eustatic changes may be the cause of the discrepancy in the local sea-level records.},
author = {Girard, C. and Cornée, J. J. and Charruault, A. L. and Corradini, C. and Weyer, D. and Bartzsch, K. and Joachimski, Michael and Feist, R.},
doi = {10.1127/nos/2016/0318},
faupublication = {yes},
journal = {Newsletters on Stratigraphy},
keywords = {Conodonts; Depositional environment; Microfacies; Saxo-thuringian; Sea level; Upper devonian},
pages = {71-89},
peerreviewed = {Yes},
title = {{Conodont} biostratigraphy and palaeoenvironmental trends during the {Famennian} ({Late} {Devonian}) in the thuringian buschteich section ({Germany})},
volume = {50},
year = {2017}
}
@article{faucris.118598744,
author = {Buggisch, Werner and von Bitter, Peter and Joachimski, Michael},
doi = {10.1130/G22198.1},
faupublication = {yes},
journal = {Geology},
keywords = {Conodonts; Oxygen isotopes; Pennsylvanian; Sea level},
note = {UnivIS-Import:2015-03-09:Pub.2006.nat.dgeo.IGM.LG.constr},
pages = {277-280},
peerreviewed = {Yes},
title = {{Constraints} on {Pennsylvanian} glacioeustatic sea-level changes using oxygen isotopes of conodont apatite},
volume = {34},
year = {2006}
}
@article{faucris.116523264,
abstract = {Coral reefs have grown continuously during the Last 24 ka on the island of Espiritu Santo (Vanuatu, South-West Pacific) in a setting characterized by frequent tectonic uplifts related to subduction of the Australia plate beneath the Vanuatu Island arc. Sedimentological and geochemical studies of two neighbouring areas having much different mean uplift rates and environmental settings provides an opportunity to analyze the environmental factors that promoted the widespread development of microbialite crusts from about 24 to 6 ka B.P. Nutrient supplies, and probably the rapidity of the sea level rise, are critical to an explanation of the distinctive distribution of microbialites in reef cores. Nutrient flux has been related to terrigenous fluxes in the Tasmaloum reef system that fringed the south-west uplifting coast of Espiritu Santo and possibly to upwelling in the Urélapa sequence that was isolated from the main island during its growth. A peak in microbialite abundance occurred between 16 and 10 ka B.P., a time window characterized by increasing erosional processes and/or more intense upwelling during a very rapid rise in sea-level. Crown Copyright © 2005 Published by Elsevier B.V. All rights reserved.},
author = {Joachimski, Michael and et al.},
author_hint = {Cabioch G., Camoin G., Webb G.E., Le Cornec F., Molina M.G., Pierre C., Joachimski Michael},
doi = {10.1016/j.sedgeo.2005.12.019},
faupublication = {yes},
journal = {Sedimentary Geology},
keywords = {Coral reef; Deglacial; Microbialite; South-West Pacific; Vanuatu},
note = {UnivIS-Import:2015-03-09:Pub.2006.nat.dgeo.IGM.LG.contri},
pages = {297-318},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Contribution} of microbialites to the development of coral reefs during the last deglacial period: case study from {Vanuatu} ({South} {West} {Pacific}).},
volume = {185},
year = {2006}
}
@article{faucris.119520104,
abstract = {The origin and development of Early Devonian (late Pragian to late Zlichovian; predominantly uppermost Zlichovian as indicated by conodont faunas) mud mounds of the Hamar Laghdad area in the eastern Antiatlas, Morocco, are controlled by extrinsic and intrinsic factors. Extrinsic factors include the existence of a paleohigh (Lochkovian volcaniclastics), unidirectional currents and repeated storm events as well as sea level fluctuations. Intrinsic, biologically induced factors are the preferred growth of organisms on the top and the flanks of the mounds because of more favourable ecological conditions, and a rapid synsedimentary lithification of the steep mound flanks by interskeletal cementation of auloporid tabulate corals. The mounds developed in an epicontinental basin below the wave base but within the range of storms. The formation of the mounds started within the uppermost part of the bedded crinoid facies of the Kess-Kess Formation with the hydrological accumulation of a bioclastic pile. This elevation became settled by crinoids and high-diverse tabulate corals producing bioclastic sediment. Binding activities of the organisms were missing, calcareous algae and stromatoporoids are completely absent. Baffling by thamnoporid tabulate corals might have occurred locally but was not important for the development of the mounds. Steep slopes to the north and less steep slopes to the south may be the result of north-northwest to south-southeast trending currents, derived from orientation patterns of orthocone nautiloids in the uppermost beds of the Kess-Kess Formation. A synsedimentary cementation of the flanks, possibly triggered by submarine interskeletal cementation of patchily distributed auloporid colonies, protected the bioclastic sediment against redistribution by frequent storms (indicated by densely spaced eventstone intervals and partly also by the common »Stromatactis«-like structures within the mound facies). Accumulation of more parautochthonous bioclastic sediment within the mounds as compared to the intermound area, therefore, is caused by a selfsustaining system of hydrologic piling of sediment triggered by storms, preferred settlement of organisms upon these piles, producing bioclastic sediment and coeval biocementation of the growing mound flanks. This model differs from existing mud mound models in the lack or only minor significance of binding and baffling, in the lack of mound facies sequences and in the greater importance of extrinsic control factors. © 1992 Ferdinand Enke Verlag Stuttgart.},
author = {Buggisch, Werner and Joachimski, Michael and et al.},
author_hint = {Brachert T.C., Buggisch Werner, Flügel E., Hüssner H.M., Joachimski Michael, Tourneur F., Walliser O.H.},
doi = {10.1007/BF01764537},
faupublication = {yes},
journal = {Geologische Rundschau},
note = {UnivIS-Import:2015-03-05:Pub.1992.nat.dgeo.IGM.LG.contro},
pages = {15-44},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Controls} of mud mound formation: the {Early} {Devonian} {Kess}-{Kess} carbonates of the {Hamar} {Laghdad}, {Antiatlas}, {Morocco}.},
year = {1992}
}
@article{faucris.122396604,
abstract = {The Early Aptian encountered several crises in neritic and pelagic carbonate production, major perturbations in the carbon cycle, and an oceanic anoxic event (OAE1a). Yet the causal links between these perturbations and climate changes remain poorly understood, partly because temperature records spanning the Early Aptian interval are still scant. We present new δO data from well-preserved bivalves from a carbonate platform of the Galve subbasin (Spain) that document a major cooling event postdating most of OAE1a. Our data show that cooling postdates the global platform demise and cannot have triggered this event that occurred during the warmest interval. The warmest temperatures coincide with the time equivalent of OAE1a and with platform biotic assemblages dominated by microbialites at Aliaga as well as on other Tethyan platforms. Coral-dominated assemblages then replace microbialites during the subsequent cooling. Nannoconids are absent during most of the time equivalent of the OAE1a, probably related to the well-known crisis affecting this group. Yet they present a transient recovery in the upper part of this interval with an increase in both size and abundance during the cool interval portion that postdates OAE1a. An evolution toward cooler and drier climatic conditions may have induced the regional change from microbial to coral assemblages as well as nannoconids size and abundance increase by limiting continent-derived input of nutrients.},
author = {Bonin, Aurelie and Puceat, Emmanuelle and Vennin, Emmanuelle and Mattioli, Emanuela and Aurell, Marcos and Joachimski, Michael and Barbarin, Nicolas and Laffont, Remi},
doi = {10.1002/2015PA002835},
faupublication = {yes},
journal = {Paleoceanography},
keywords = {Aptian; oxygen isotopes; palaeoclimate; platform demise},
pages = {66-80},
peerreviewed = {Yes},
title = {{Cool} episode and platform demise in the {Early} {Aptian}: {New} insights on the links between climate and carbonate production},
volume = {31},
year = {2016}
}
@article{faucris.111866524,
abstract = {Most high-resolution, proxy-based paleoclimate research has concentrated on tropical oceans, while mid-and high-latitude marine regions have received less attention, despite their importance in the global climate system. At present, sclerochronological analyses of bivalve mollusks supply the bulk of annual-to subannual-resolution extratropical marine climate data, even though interpretation is complicated by a slowdown of growth with increasing shell age. Hence, in order to address the need for additional high-resolution proxy climate data from extratropical regions, we conducted the first year-long in situ field calibration of the coralline red alga Clathromorphum compactum in the Gulf of Maine, United States. Coralline red algae are widely distributed in coastal regions worldwide, and individual calcified plants can live continuously for several centuries in temperate and subarctic oceans. Stable oxygen isotopes extracted at subannual resolution from growth increments of monitored specimens of C. compactum relate well to in situ-measured sea-surface temperatures during the May to December calcification period, highlighting the suitability of coralline red algae as an extratropical climate archive. Furthermore, there is a strong correlation between a 30 yr δ18O record of C. compactum and an instrumental sea-surface temperature record (r = -0.58,p = 0.0008) and a proxy reconstruction derived from the bivalve Arctica islandica collected in the central Gulf of Maine (r = 0.54,p = 0.002). © 2008 The Geological Society of America.},
author = {Halfar, Jochen and Steneck, R. S. and Joachimski, Michael and Kronz, A. and Wanamaker, A. D.},
doi = {10.1130/G24635A.1},
faupublication = {yes},
journal = {Geology},
keywords = {Clathromorphum; Coralline red algae; Gulf of Maine; Paleoclimate; Sclerochronology},
note = {UnivIS-Import:2015-03-09:Pub.2008.nat.dgeo.IGM.LG.corall},
pages = {463-466},
peerreviewed = {Yes},
title = {{Coralline} red algae as high-resolution climate recorders},
volume = {36},
year = {2008}
}
@article{faucris.116525684,
abstract = {Lake-fill deposits spanning the last 15,000 years provide the first dated record of changes in vegetation, human inhabitation and monsoon variability during the latest Pleistocene-Holocene in the Ganga Plain. The lake vegetation, pollen of plants cultured by man, carbon isotopes and lithology exhibit marked changes with changing monsoon rainfall. A relatively dry spell for 15,000-13,000 14C yrs BP humid conditions from 13,000 to 5800 14C yrs BP and again dry conditions from 5000 to 2000 14C yrs BP are identified. From ∼ 1700 14C yr BP, there is evidence of climatic amelioration. A prominent dry spell corresponding to the Younger Dryas event is identified around an estimated age of 11,500-10,500 14C yrs BP and is accompanied by evidences of decreased human activity during this phase.},
author = {Joachimski, Michael and et al.},
author_hint = {Sharma S., Joachimski Michael, Tobschall Heinz Jürgen, Sharma M., Singh I.B., Sharma C., Chauhan M.S.},
faupublication = {yes},
journal = {Current Science},
keywords = {Ganga Plain; Human inhabitation; Monsoon variability; Sanai lake; Vegetation change},
note = {UnivIS-Import:2015-03-09:Pub.2006.nat.dgeo.IGM.LG.correl},
pages = {973-978},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Correlative} {Evidences} of {Monsoon} {Variability}, {Vegetation} {Change} and {Human} {Inhabitation} in {Sanai} lake deposit: {Ganga} {Plain}, {India}.},
volume = {90},
year = {2006}
}
@article{faucris.119598424,
author = {Mondillo, Nicola and Boni, Maria and Joachimski, Michael and Santoro, L},
doi = {10.3390/min7110217},
faupublication = {yes},
journal = {Minerals},
keywords = {C–O stable isotopes; Middle East; Weathering; Zn-nonsulfide deposits},
peerreviewed = {Yes},
title = {{C}–{O} stable isotope geochemistry of carbonate minerals in the nonsulfide zinc deposits of the middle east: {A} review},
volume = {7},
year = {2017}
}
@article{faucris.119935684,
author = {Garnit, Hechmi and Boni, Maria and Buongiovanni, Giuliana and Arfè, Giuseppe and Mondillo, Nicola and Bouhlel, Salah and Balassone, Giuseppina and Joachimski, Michael},
doi = {10.3390/min8010013},
faupublication = {yes},
journal = {Minerals},
keywords = {C-O stable isotopes; Mineralogy; Nonsulfide deposits; Paleoclimate; Tunisia},
peerreviewed = {unknown},
title = {{C}-{O} stable isotopes geochemistry of {Tunisian} nonsulfide zinc deposits: {A} first look},
volume = {8},
year = {2018}
}
@article{faucris.202449298,
author = {Weinzierl, Christoph and Regelous, Marcel and Haase, Karsten and Bach, W. and Böhm, F. and Garbe-Schönberg, D. and Sun, Yadong and Joachimski, Michael and Krumm, Stefan},
doi = {10.1016/j.chemgeo.2018.07.014},
faupublication = {yes},
journal = {Chemical Geology},
keywords = {87Sr/86Sr; Akaki; Carbonates; CO2; Alteration; Calcites; Hydrothermal fluid; Mg/Ca; Cretaceous; Fluid evolution; Seawater composition; Seawater; oxygen isotopes; Ophiolite; Troodos; Thermodynamic model; Sr/Ca; Seawater-rock reaction; δ44/40Ca},
peerreviewed = {Yes},
title = {{Cretaceous} seawater and hydrothermal fluid compositions recorded in abiogenic carbonates from the {Troodos} {Ophiolite}, {Cyprus}},
year = {2018}
}
@article{faucris.113853344,
author = {Calner, Mikael and Lehnert, Oliver and Wu, Rongchang and Dahlqvist, Peter and Joachimski, Michael},
doi = {10.1080/11035897.2014.901409},
faupublication = {yes},
journal = {Gff},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LG.d13cch},
pages = {in press},
peerreviewed = {Yes},
title = {{d13C} chemostratigraphy in {Lower}-{Middle} {Ordovician} succession of {Öland} ({Sweden}) and the global significance of the {MDICE}},
year = {2014}
}
@article{faucris.113855104,
author = {Lehnert, Oliver and Meinhold, Guido and Wu, Rongchang and Calner, Mikael and Joachimski, Michael},
doi = {10.3176/earth.2014.31},
faupublication = {yes},
journal = {Estonian Journal of Earth Sciences},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LG.d13cch{\_}3},
pages = {277-286},
peerreviewed = {Yes},
title = {{d13C} chemostratigraphy in the upper {Tremadocian} through lower {Katian} ({Ordovician}) carbonate succession of the {Siljan} district, central {Sweden}.},
volume = {63},
year = {2014}
}
@article{faucris.112192564,
author = {Zigaite, Zivile and Joachimski, Michael and Lehnert, Oliver and Brazauskas, Antanas},
doi = {10.1016/j.palaeo.2010.03.033},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LG.d18oco},
pages = {242-247},
peerreviewed = {Yes},
title = {{d18O} compostion from conodont apatite indicates climate cooling during the {Middle} {Pridoli}},
volume = {294},
year = {2010}
}
@article{faucris.111772364,
author = {Lehnert, Oliver and Stouge, Svend and Joachimski, Michael and Buggisch, Werner},
faupublication = {yes},
journal = {Acta Palaeontologica Sinica},
note = {UnivIS-Import:2015-03-09:Pub.2007.nat.dgeo.IGM.LG.d18ore},
pages = {256-261},
peerreviewed = {Yes},
title = {{d18O} record from conodont apatite across the {Lower}-{Middle} {Ordovician} boundary on the {Yangtze} platform ({Western} {Hubei}, {South} {China}).},
volume = {46},
year = {2007}
}
@article{faucris.200563553,
author = {Bergström, Stig M. and Ahlberg, Per and Maletz, Jörg and Lundberg, Frans and Joachimski, Michael},
doi = {10.1080/11035897.2018.1466833},
faupublication = {yes},
journal = {GFF},
keywords = {chemostratigraphy; conodonts; Baltoscandia; biostratigraphy; graptolites; Middle Ordovician},
pages = {1-12},
peerreviewed = {unknown},
title = {{Darriwilian} ({Middle} {Ordovician}) chemostratigraphy linked to graptolite, conodont and trilobite biostratigraphy in the {Fågelsång}-3 drill core, {Scania}, {Sweden}},
volume = {000},
year = {2018}
}
@article{faucris.120132584,
abstract = {This study presents carbon and oxygen stable isotope data obtained from high-resolution sampling (<500 μm) of the brachiopod Terebratalia transversa from the San Juan Islands (Washington State, USA). The aim of this study is to unravel the respective effects of physiological and environmental controls on the stable isotopic composition of brachiopod shell calcite. Based on an SEM study of the shell, a three-dimensional sampling was performed in order to investigate carbon and oxygen isotope variations along isochrons and ontogenetic transects. The primary as well as the outer part of the secondary shell layer display large and variable isotopic offsets as high as -7‰ for δ 13C and -6‰ for δ 18O relative to expected equilibrium values. The significant positive correlations between δ 18O and δ 13C values indicate that the isotopic compositions of these shell domains are mainly controlled by kinetic isotope fractionation effects. The ontogenetic δ 13C and δ 18O variations can be used to establish a growth curve of the studied specimen whose age is estimated close to 8 years. The extent of apparent O-18 disequilibrium observed in this study is about as large as any yet measured in any organism, which makes this brachiopod an interesting and important case. The carbon and oxygen isotope compositions increase from the outer towards the inner part of the secondary layer, where they reach values of 0-0.8‰ and -0.8‰ to -0.2‰, respectively. Corresponding calculated temperatures are between 12 and 13.8 °C and fall in the range of seawater temperatures recorded off the San Juan Islands (7-13 °C). These results suggest that the calcite fibres were secreted more and more slowly during the thickening of the shell throughout the animal's life, finally approximating isotopic equilibrium.This study illustrates that the stable isotopic composition of the modern brachiopod T. transversa is predominantly influenced by kinetic fractionation and, to a minor degree, by metabolic effects. Except for the innermost part of the shell, the measured isotope ratios do not reflect environmental conditions during shell precipitation. It remains to be tested by comparable studies whether other modern brachiopod species or even fossil brachiopods reflect comparable fractionation effects. These results point out the need for re-examination of Paleozoic oceanographic conditions. © 2003 Elsevier B.V. All rights reserved.},
author = {Joachimski, Michael and et al.},
author_hint = {Auclair A.C., Joachimski Michael, Lécuyer M.M.},
doi = {10.1016/S0009-2541(03)00233-X},
faupublication = {yes},
journal = {Chemical Geology},
keywords = {Carbon-13; Kinetic effects; Oxygen-18; Paleozoic; Respiration},
note = {UnivIS-Import:2015-03-09:Pub.2003.nat.dgeo.IGM.LG.deciph},
pages = {59-78},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Deciphering} kinetic, metabolic and environmental controls on stable isotope fractionations between seawater and the shell of {Terebratalia} transversa ({Brachiopoda}).},
year = {2003}
}
@article{faucris.113857744,
author = {Chen, Zhong-Qiang and Joachimski, Michael and Montanez, Isabel and Isbell, John},
doi = {10.1016/j.gr.2014.01.010},
faupublication = {yes},
journal = {Gondwana Research},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LG.deepti},
pages = {1289-1293},
peerreviewed = {Yes},
title = {{Deep} time climatic and environmental extremes and ecosystem response: an introduction.},
volume = {25},
year = {2014}
}
@article{faucris.111999844,
abstract = {Conodonts, microfossils composed of carbonate-fluor apatite, are abundant in Palaeozoic-Triassic sediments and have a high potential to preserve primary oxygen isotope signals. In order to reconstruct the palaeotemperature history of the Devonian, the oxygen isotope composition of apatite phosphate was measured on 639 conodont samples from sequences in Europe, North America and Australia. The Early Devonian (Lochkovian; 416-411 Myr) was characterized by warm tropical temperatures of around 30 °C. A cooling trend started in the Pragian (410 Myr) with intermediate temperatures around 23 to 25 °C reconstructed for the Middle Devonian (397-385 Myr). During the Frasnian (383-375 Myr), temperatures increased again with temperatures to 30 °C calculated for the Frasnian-Famennian transition (375 Myr). During the Famennian (375-359 Myr), surface water temperatures slightly decreased. Reconstructed Devonian palaeotemperatures do not support earlier views suggesting the Middle Devonian was a supergreenhouse interval, an interpretation based partly on the development of extensive tropical coral-stromatoporoid communities during the Middle Devonian. Instead, the Devonian palaeotemperature record suggests that Middle Devonian coral-stromatoporoid reefs flourished during cooler time intervals whereas microbial reefs dominated during the warm to very warm Early and Late Devonian. © 2009 Elsevier B.V. All rights reserved.},
author = {Joachimski, Michael and Breisig, Stephan and Buggisch, Werner and Talent, John and Mawson, Ruth and Gereke, Manfred and Morrow, Jarred and Day, Jed and Weddige, Karsten},
doi = {10.1016/j.epsl.2009.05.028},
faupublication = {yes},
journal = {Earth and Planetary Science Letters},
keywords = {apatite; climate; Devonian; oxygen isotopes; reefs},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LG.devoni},
pages = {599-609},
peerreviewed = {Yes},
title = {{Devonian} climate and reef evolution: insights from oxygen isotopes in apatite.},
volume = {284,},
year = {2009}
}
@article{faucris.264375051,
abstract = {A new Devonian oxygen isotope record based on 180 measurements of conodont apatite is reported from South China. The comparison with published Devonian δ18Oapatite data shows a considerable offset between records from different paleocontinents. This difference can be interpreted by regional variations in salinity, with the epicontinental seas having a distinctly lower salinity and δ18Oseawater than the open ocean due to the influence of fresh-water runoff. Our findings suggest that the oxygen isotope record from open ocean settings is the preferred archive for reconstructing the history of ocean temperature and/or ice volume over the Phanerozoic. Despite regional differences, the South China and European records show similar long-term trends characterized by a pronounced cooling during the Pragian to Eifelian followed by significant warming over the Eifelian/Givetian to Frasnian, and a further cooling starting in the Famennian, accelerating in the earliest Carboniferous. The Early Devonian cooling coincided with early vascular plant root − soil interactions and a significant diversity increase in both spores and megaplant fossils, suggesting that the rise of rooted vascular plants may have played a key role in triggering climate cooling. Subsequent climatic warming over the Middle to Late Devonian transition may have been linked to metamorphic CO2 input from the Acadian Orogeny, while Famennian cooling occurred in a context of exposure and weathering of basalts and ophiolites and coincided with the advent of seed plants. We conclude that climate changes during the Devonian were likely driven by a combination of plant evolutionary advances and changes in tectonics. We further test these interpretations by running the COPSE (Carbon, Oxygen, Phosphorus, Sulfur and Evolution) biogeochemical model. The model prediction is capable of reproducing the pCO2 record under these scenarios, although the model is not capable of reproducing the degree of temperature variation, likely due to its simplicity.},
author = {Chen, Bo and Ma, Xueping and Mills, Benjamin J.W. and Qie, Wenkun and Joachimski, Michael and Shen, Shuzhong and Wang, Chengyuan and Xu, Honghe and Wang, Xiangdong},
doi = {10.1016/j.earscirev.2021.103814},
faupublication = {yes},
journal = {Earth-Science Reviews},
keywords = {Paleotemperatures; Vascular vegetation; Acadian Orogeny; Volcanism; Regional δ18O difference},
pages = {103814},
peerreviewed = {Yes},
title = {{Devonian} paleoclimate and its drivers: {A} reassessment based on a new conodont {δ18O} record from {South} {China}},
year = {2021}
}
@article{faucris.117440664,
author = {Barham, Milo and Joachimski, Michael and Murray, J. and Williams, D. M.},
doi = {10.1016/j.chemgeo.2011.12.026},
faupublication = {yes},
journal = {Chemical Geology},
note = {UnivIS-Import:2015-03-09:Pub.2012.nat.dgeo.IGM.LG.diagen},
pages = {11-19},
peerreviewed = {Yes},
title = {{Diagenetic} alteration of the structure and {d18O} signature of {Palaeozoic} ichthyolith and conodont apatite: potential use for corrected isotope signatures in palaeoenvironmental interpretation.},
volume = {298-299},
year = {2012}
}
@article{faucris.201286840,
author = {Huang, Cheng and Joachimski, Michael and Gong, Yiming},
doi = {10.1016/j.epsl.2018.05.016},
faupublication = {yes},
journal = {Earth and Planetary Science Letters},
keywords = {Devonian; oxygen isotope; conodont; palaeotemperature; South China},
pages = {174-184},
peerreviewed = {Yes},
title = {{Did} climate changes trigger the {Late} {Devonian} {Kellwasser} {Crisis}? {Evidence} from a high-resolution conodont {δ18OPO4} record from {South} {China}},
volume = {495},
year = {2018}
}
@article{faucris.121062084,
author = {Buggisch, Werner and Joachimski, Michael and Lehnert, Oliver and Bergström, Stig M. and Repetski, John E.},
doi = {10.1130/G32139Y.1},
faupublication = {yes},
journal = {Geology},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LG.didint},
pages = {238},
peerreviewed = {Yes},
title = {{Did} intense volcanism trigger the first {Late} {Ordovician} icehouse? {REPLY}.},
volume = {39},
year = {2011}
}
@article{faucris.121251944,
author = {Buggisch, Werner and Joachimski, Michael and Lehnert, Oliver and Bergström, Stig M. and Repetski, John E. and Webers, Gerald F.},
doi = {10.1130/G30577.1},
faupublication = {yes},
journal = {Geology},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LG.didint},
pages = {327-330},
peerreviewed = {Yes},
title = {{Did} intense volcanism trigger the first {Ordovician} icehouse?},
volume = {38},
year = {2010}
}
@article{faucris.121124564,
author = {Barham, Milo and Blyth, Alison J. and Wallwork, Melinda D. and Joachimski, Michael and Martin, Laure and Evans, Noreen J. and Laming, Belinda and McDonald, Bradley J.},
doi = {10.1016/j.quascirev.2017.10.004},
faupublication = {yes},
journal = {Quaternary Science Reviews},
keywords = {Alteration; Cenozoic; Dentine; Digestion; Enamel; Palaeoclimatology; Palaeoenvironmental proxy; Predation; Stable isotopes; Trace elements},
pages = {71-84},
peerreviewed = {Yes},
title = {{Digesting} the data - {Effects} of predator ingestion on the oxygen isotopic signature of micro-mammal teeth},
volume = {176},
year = {2017}
}
@article{faucris.122809324,
author = {Zhang, Z. T. and Sun, Y. D. and Lai, X. L. and Joachimski, Michael and Wignall, P. B. and Sun, Yadong},
doi = {10.1016/j.palaeo.2017.02.011},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Biostratigraphy; Late Triassic; Middle Triassic; Wayao Formation; Zhuganpo Formation},
peerreviewed = {Yes},
title = {{Early} {Carnian} conodont fauna at {Yongyue}, {Zhenfeng} area and its implication for {Ladinian}-{Carnian} subdivision in {Guizhou}, {South} {China}},
year = {2017}
}
@article{faucris.113862144,
author = {Wacker, Ulrike and Fiebig, Jens and Toedter, Julian and Schoene, Bernd R. and Bahr, Andre and Friedrich, Oliver and Tuetken, Thomas and Gischler, Eberhard and Joachimski, Michael},
doi = {10.1016/j.gca.2014.06.004},
faupublication = {yes},
journal = {Geochimica Et Cosmochimica Acta},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LG.empiri},
pages = {127-144},
peerreviewed = {Yes},
title = {{Empirical} calibration of the clumped isotope palaeothermometer using calcites of various origins.},
volume = {141},
year = {2014}
}
@article{faucris.269945742,
abstract = {The link between the Permian–Triassic mass extinction (252 million years ago) and the emplacement of the Siberian Traps Large Igneous Province (STLIP) was first proposed in the 1990s. However, the complex cascade of volcanically driven environmental and biological events that led to the largest known extinction remains challenging to reconstruct. In this Review, we critically evaluate the geological evidence and discuss the current hypotheses surrounding the kill mechanisms of the Permian–Triassic mass extinction. The initial extrusive and pyroclastic phase of STLIP volcanism was coeval with a widespread crisis of terrestrial biota and increased stress on marine animal species at high northern latitudes. The terrestrial ecological disturbance probably started 60–370 thousand years before that in the ocean, indicating different response times of terrestrial and marine ecosystems to the Siberian Traps eruptions, and was related to increased seasonality, ozone depletion and acid rain, the effects of which could have lasted more than 1 million years. The mainly intrusive STLIP phase that followed is linked with the final collapse of terrestrial ecosystems and the rapid (around 60 thousand years) extinction of 81–94% of marine species, potentially related to a combination of global warming, anoxia and ocean acidification. Nevertheless, the ultimate reasons for the exceptional severity of the Permian–Triassic mass extinction remain debated. Improved geochronology (especially of terrestrial records and STLIP products), tighter ecological constraints and higher-resolution Earth system modelling are needed to resolve the causal relations between volcanism, environmental perturbations and the patterns of ecosystem collapse.
34Spyrite, and organic maceral content. This analysis yielded the novel insight that all proxies related to authigenic iron sulfides (e.g., Stotal and Spyrite, Fetotal and Fepyrite, Fepy/FeHR, and δ34Spyrite) covary negatively with TOC within the dm-scale cycles. We interpret the unusual pattern of negative TOC-pyrite covariation in the Cleveland and Sunbury shales to have resulted from differential distributions of labile organic matter (OM), which drove H2S production via microbial sulfate reduction (MSR), and reactive Fe, which controlled pyrite formation. Labile OM was concentrated in high-TOC layers whereas reactive Fe was concentrated in low-TOC layers (possibly as Fe-oxyhydroxide coatings on silt grains), as a consequence of which part of the H2S generated in the high-TOC layers diffused upward into the low-TOC layers before becoming fixed as pyrite. This process is evidenced by several contrasts between high-TOC and low-TOC layers: (1) higher Spyrite concentrations and Fepy/FeHR values in the latter, (2) concentration of pyrite in the lower part of low-TOC layers, immediately above high-TOC layers, and (3) higher δ34Spyrite values in the latter, reflecting late diagenetic formation of the H2S that diffused upward into the low-TOC layers. To our knowledge, this process has not been documented previously in ancient marine shales, probably owing to insufficiently high-resolution analysis in earlier studies.},
author = {Liu, Jiang Si and Algeo, Thomas J. and Jaminski, Jacek and Kuhn, Thomas and Joachimski, Michael},
doi = {10.1016/j.chemgeo.2019.07.019},
faupublication = {yes},
journal = {Chemical Geology},
keywords = {Anoxia; Cleveland Shale; Productivity; Pyrite; Redox; Sunbury Shale},
note = {CRIS-Team Scopus Importer:2019-08-23},
pages = {303-320},
peerreviewed = {Yes},
title = {{Evaluation} of high-frequency paleoenvironmental variation using an optimized cyclostratigraphic framework: {Example} for {C}-{S}-{Fe} analysis of {Devonian}-{Mississippian} black shales ({Central} {Appalachian} {Basin}, {U}.{S}.{A}.)},
volume = {525},
year = {2019}
}
@article{faucris.122037344,
author = {Barbarin, Nicolas and Bonin, Aurelie and Mattioli, Emanuela and Puceat, Emmanuelle and Cappetta, Henri and Greselle, Benjamin and Pittet, Bernard and Vennin, Emmanuelle and Joachimski, Michael},
doi = {10.1016/j.marmicro.2011.11.005},
faupublication = {yes},
journal = {Marine Micropaleontology},
note = {UnivIS-Import:2015-03-09:Pub.2012.nat.dgeo.IGM.LG.marine},
pages = {37-53},
peerreviewed = {Yes},
title = {{Evidence} for a complex nannoconid decline in the {Vocontian} basin ({South} {East} {France}).},
volume = {84-85},
year = {2012}
}
@article{faucris.121139964,
author = {Joachimski, Michael and et al.},
author_hint = {Böhm F., Haase-Schramm A., Eisenhauer A., Dullo W.C., Joachimski Michael, Lehnert H., Reither J.},
faupublication = {yes},
journal = {Geochemistry Geophysics Geosystems},
note = {UnivIS-Import:2015-03-09:Pub.2002.nat.dgeo.IGM.LG.eviden},
pages = {10.1029/2001GC000264},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Evidence} for preindustrial variations in the marine surface water carbonate system from coralline sponges},
volume = {3},
year = {2002}
}
@article{faucris.107749664,
abstract = {The coral patch-reef of Laisacker (Neuburg a.d. Donau, Southern Franconian Alb) exhibits three facies zones: the reef core consists of reef debris, there is almost no reef framework. The core facies, interfingering with the reef debris facies is built up by fine-grained reef detritus with intercalated coarse-grained layers of partly high porosity (up to 24%). They mainly consist of coral fragments (up to 83%) and reach 0.80 m in thickness. These coarse-grained layers have been formed by storms. The interreef facies corresponds to massive limestones. Destruction of the reef framework was favoured by bioerosion. The high still open porosity of the coarsegrained reef rubble was caused by high freshwater flow rates delimiting cementation and favouring dissolution. © 1987 Institut für Paläontologie, Universität Erlangen.},
author = {Joachimski, Michael and Scheller, Josef},
doi = {10.1007/BF02536777},
faupublication = {yes},
journal = {Facies},
pages = {129-139},
peerreviewed = {Yes},
title = {{Facies}-controlled diagenesis in an upper jurassic coral patch-reef ({Lower} {Tithonian}, {Southern} {Germany})},
volume = {17},
year = {1987}
}
@article{faucris.117443744,
author = {Buggisch, Werner and Blomeier, Dierk and Joachimski, Michael},
doi = {10.1127/1860-1804/2012/0163-0309},
faupublication = {yes},
journal = {Zeitschrift der Deutschen Gesellschaft für Geowissenschaften},
note = {UnivIS-Import:2015-03-09:Pub.2012.nat.dgeo.IGM.LG.facies{\_}9},
pages = {309-321.},
peerreviewed = {Yes},
title = {{Facies}, diagenesis and carbon isotopes of the {Early} {Permian} {Gipshuken} {Formation} ({SValbard}).},
volume = {163},
year = {2012}
}
@article{faucris.106947984,
author = {Fryda, Jiri and Lehnert, Oliver and Joachimski, Michael},
doi = {10.3176/earth.2015.08},
faupublication = {yes},
journal = {Estonian Journal of Earth Sciences},
note = {UnivIS-Import:2015-07-08:Pub.2015.nat.dgeo.IGM.LG.firstr},
pages = {42-46},
peerreviewed = {Yes},
title = {{First} record of the early {Sheinwoodian} carbon isotope excursion ({ESCIE}) from the {Barrandian} area of northwestern {Perigondwana}.},
volume = {64},
year = {2015}
}
@article{faucris.273773990,
abstract = {The end-Permian mass extinction, the largest biological crisis in Earth history, is currently understood in the context of Siberian Traps volcanism introducing large quantities of greenhouse gases to the atmosphere, culminating in the Early Triassic hothouse. In our study, the late Permian and Early Triassic atmospheric CO2 history was reconstructed by applying the paleosol pCO2 barometer. Atmospheric pCO2 shows an approximate 4× increase from mean concentrations of 412–919 ppmv in the late Permian (Changhsingian) to maximum levels between 2181 and 2610 ppmv in the Early Triassic (late Griesbachian). Mean CO2 estimates for the later Early Triassic are between 1261–1936 ppmv (Dienerian) and 1063–1757 ppmv (Spathian). Significantly lower concentrations ranging from 343 to 634 ppmv are reconstructed for the latest Early to Middle Triassic (Anisian). The 5 m.y. episode of elevated pCO2 suggests that negative feedback mechanisms such as silicate weathering were not effective enough to reduce atmospheric pCO2 to precrisis levels and that marine authigenic clay formation (i.e., reverse weathering) may have been an important component of the global carbon cycle keeping atmospheric pCO2 at elevated levels.
},
author = {Chirico, Rita and Mondillo, Nicola and Boni, Maria and Joachimski, Michael and Ambrosino, Maurizio and Buret, Yannick and Mormone, Angela and Nazareno Beteta Leigh, Luis Enrique and Flores, Willy Huaman and Balassone, Giuseppina},
doi = {10.5382/econgeo.4941},
faupublication = {yes},
journal = {Economic Geology},
pages = {1339-1366},
peerreviewed = {Yes},
title = {{Genesis} of the {Florida} {Canyon} {Nonsulfide} {Zn} {Ores} ({Northern} {Peru}): {New} {Insights} {Into} the {Supergene} {Mineralizing} {Events} of the {Bongará} {District}},
volume = {117},
year = {2022}
}
@article{faucris.119381944,
author = {Kaiser, Sandra and Steuber, Thomas and Becker, R. T. and Joachimski, Michael},
doi = {10.1016/j.palaeo.2006.03.048},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Apatite; C isotopes; Conodonts; Devonian-Carboniferous boundary; Mass extinction event; O isotopes},
pages = {146-160},
peerreviewed = {Yes},
title = {{Geochemical} evidence for major environmental change at the {Devonian}-{Carboniferous} boundary in the {Carnic} {Alps} and the {Rhenish} {Massif}},
volume = {240},
year = {2006}
}
@article{faucris.120996084,
author = {Joachimski, Michael and et al.},
author_hint = {Kaiser S.I., Steuber T., Becker R.T., Joachimski Michael},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
note = {UnivIS-Import:2015-03-09:Pub.2006.nat.dgeo.IGM.LG.geoche},
pages = {146-160},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Geochemical} evidence for major environmental change at the {Devonian}-{Carboniferous} boundary mass-extinction.},
volume = {240},
year = {2006}
}
@article{faucris.111218404,
abstract = {A model of the global biogeochemical cycles coupled to a energy-balance climate model (the COMBINE model) is used to identify the causes of two large δ
13C value excursions across the Frasnian-Famennian (F-F) boundary. We test a scenario that links the sea-level rise to stratification of the Proto-Tethys ocean through the formation of warm saline deep waters in extended epicontinental seas. Even though this scenario can produce dysoxia below 100 m depth, it fails to increase the global burial flux of organic carbon and thus seawater δ
13C values, since stratification of the ocean leads to decreased productivity in surface waters. Several scenarios postulating a continental origin of the perturbations in the Late Devonian biogeochemical cycles are then tested. We found that weathering of platform carbonates exposed during the Early Famennian sea-level fall can account for a maximum positive shift in δ
13C value of +0.7‰ at the end of the sea-level fall episode. Another +1.0‰ increase in δ
13C might originate from rapid spreading of vascular land plants near the F-F boundary, postulating that higher plants globally increased the weatherability of continental surface, and that colonized continental area increased by 30% across the F-F boundary. Finally, the δ
13C excursion observed at the base of Upper rhenana Zone and the rapid increase of the carbon isotope ratios at the F-F boundary require an increase of phosphorus delivery to the ocean by 40%, coeval with the sea-level rises. Once the calculated δ
13C values are in agreement with the measured data, the COMBINE model calculates a decrease in atmospheric pCO
2 from pre-perturbation 2925 ppmv in the Lower rhenana conodont Zone to 1560 ppmv in the Upper triangularis Zone. This decrease in pCO
2 is due to the increase in burial of organic matter during the Kellwasser events, and increased continental weatherability triggered by the spreading of continental vascular plants. These changes occur within 4 million years. The corresponding global climatic cooling reaches 4.4°C at the pole, and 2.1°C at the equator. © 2003 Elsevier B.V. All rights reserved.},
author = {Joachimski, Michael and Goddéris, Yves},
doi = {10.1016/S0031-0182(03)00641-2},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Carbon dioxide; Famennian; Frasnian; Isotope ratios; Modelling; Seawater},
note = {UnivIS-Import:2015-03-09:Pub.2004.nat.dgeo.IGM.LG.global},
pages = {309-329},
peerreviewed = {Yes},
title = {{Global} change in the {Late} {Devonian}: modelling the {Frasnian}-{Famennian} short-term carbon isotope excursions},
year = {2004}
}
@article{faucris.123633884,
author = {Dusitra, Anna and Wignall, Paul and Blomeier, Dirk and Joachimski, Michael and Hartkopf-Fröder, Christoph and Bond, David},
doi = {10.1016/j.palaeo.2013.02.004},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LG.gradua},
pages = {303-313},
peerreviewed = {Yes},
title = {{Gradual} onset of anoxia acros the {Permian}-{Triassic} boundary in {Svalbard}, {Norway}.},
volume = {374},
year = {2013}
}
@article{faucris.106949084,
abstract = {The Early Triassic was a time of remarkably high temperatures, large carbon cycle perturbations and episodes of widespread ocean anoxia. The sediments in the Nanpanjiang Basin of South China provide superb opportunities to examine the sedimentary response to these extreme conditions especially during the crisis interval at the Smithian-Spathian (S-S) boundary. We have investigated a deep water section at Jiarong and a shallower water section at Mingtang. These contain a range of facies including black shales, micritic limestone units and rudaceous carbonate event beds that include flat pebble conglomerates and breccia debrites that bear similarities to the hybrid event beds seen in clastic turbidite successions.Redox proxies (pyrite framboids and trace metals) reveal that widespread anoxia in the late Smithian persisted into the Novispathodus pingdingshanensis Zone of the early Spathian before a sharp transition to highly oxygenated "griotte facies" (red marine strata) in the Icriospathodus collinsoni Zone that records an "oxic rebound". Benthic faunas are locally common but of low diversity and dominated by thin-shelled bivalves and ostracodes with small foraminifers and exceptionally rare fish remains. Bioturbation was intense only in the early-middle Spathian (I. collinsoni conodont zone) Griotte facies. Anoxia and extremely high temperatures probably played a role in severely restricting the abundance of fish and the small sizes of marine invertebrates at this time. The presence of ooids and seafloor fan cements in our study sections indicates highly saturated conditions rather than acidification at the end of the Smithian.},
author = {Wignall, P.B. and Joachimski, Michael and Bond, David and Grabs, Stephen and Sun, Si and Yan, B and Wang, Lina and Chen, Y. and Lai, Xulong and Sun, Yadong and Sun, Yadong},
doi = {10.1016/j.palaeo.2015.03.038},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Carbon isotopes; Early Triassic; Redox changes; Smithian-Spathian extinction},
note = {UnivIS-Import:2015-07-08:Pub.2015.nat.dgeo.IGM.LG.higham},
pages = {62-78},
peerreviewed = {Yes},
title = {{High} amplitude redox changes in the late {Early} {Triassic} of {South} {China} and the {Smithian}/{Spathian} extinction.},
volume = {427},
year = {2015}
}
@article{faucris.118568384,
abstract = {Understanding the interplay of climatic and biological events in deep time requires resolving the precise timing and pattern of paleotemperature changes and their temporal relationship with carbon cycle variations and biodiversity fluctuations. In situ oxygen isotope analyses of conodont apatite from South China enables us to reconstruct high-resolution seawater temperature records across the Permian-Triassic boundary (PTB) intervals in the upper slope (Meishan), lower slope (Shangsi), and carbonate platform (Daijiagou and Liangfengya) settings. Constrained by the latest high-precision geochronological dates and high-resolution conodont biozones, we can establish the temporal and spatial patterns of seawater temperature changes and assess their potential connections with the carbon cycle disruption and biodiversity decline. We find a rapid warming of ~10 °C during the latest Permian-earliest Triassic that postdated the onset of the negative shift in δC by ~81 kyr (thousand years), the abrupt decline in δC by ~32 kyr and the onset of mass extinction by ~23 kyr, which contradicts previous claims that the extreme temperature rise started immediately before or coincided with the onset of mass extinction. Our new evidence indicates that climate warming was most likely not a direct cause for the main pulse of the end-Permian mass extinction (EPME), but rather a later participant or a catalyst that increased the pace of the biodiversity decline. In addition, a prominent cooling is recorded in the earliest Changhsingian, with the main phase (a drop of ~8 °C in ~0.2 Ma) confined to the lower part of the Clarkina wangi zone and synchronous with the positive limb of the carbon isotope excursion (CIE) around the Wuchiapingian-Changhsingian boundary (WCB) in Meishan and Shangsi. Further long-term and high-resolution studies from other sections are needed to confirm the full contexts and underlying dynamics of the WCB "cooling event".},
author = {Chen, Jun and Shen, Shu-Zhong and Li, Xian-Hua and Xu, Yi-Gang and Joachimski, Michael and Bowring, Samuel A. and Erwin, Douglas H. and Yuan, Dong-Xun and Chen, Bo and Zhang, Hua and Wang, Yue and Cao, Chang-Qun and Zheng, Quan-Feng and Mu, Lin},
doi = {10.1016/j.palaeo.2015.11.025},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Climate warming; Conodont apatite; End-Permian mass extinction; Oxygen isotope; SIMS; South China},
pages = {26-38},
peerreviewed = {Yes},
title = {{High}-resolution {SIMS} oxygen isotope analysis on conodont apatite from {South} {China} and implications for the end-{Permian} mass extinction},
volume = {448},
year = {2016}
}
@article{faucris.117652084,
abstract = {The Paleoproterozoic Malmani Subgroup and Penge Formation (Transvaal Supergroup) exposed on the farms Leeuwbosch and Cornwall north of Thabazimbi (Limpopo Province, South Africa) host hydrothermal Pb-Ag-Cu-Zn and high-grade hematite iron ore deposits which include the historic Leeuwbosch lead mine. Based on ore petrography, fluid inclusion and stable isotope analyses and geochemical modeling, the structurally controlled, stratabound Leeuwbosch Pb-Ag-Cu-Zn-Fe deposits formed from high salinity NaCl-CaCl
2-rich basinal brines with total salinities from 18 to 24wt.% NaCl equivalent which are similar to those found in the Mississippi Valley Type (MVT) Pb-Zn deposits. The minimum formation temperatures (homogenization temperatures) for the lead deposits range between 120 and 185°C and the estimated formation conditions are 200°C at 1kbar pressure. Stable isotope analyses of gangue siderite and calcite indicate that the deposits formed from base metal-enriched brines derived from recycled seawater with δ
13C
vs. PDB from 0.46 to 3.17‰ and δ
18O
vs. SMOW from -2.95 to -1.79‰. Hydrothermal transport of lead and silver as PbCl
3 - and AgCl
2 - respectively took place at mildly acidic pH and elevated fO
2 in the SO
4 2- predominance field. Extensive host rock interaction neutralized and reduced the ore fluid to precipitate galena hosting Ag with chalcopyrite and sphalerite. Fluid inclusions in gangue quartz and calcite in the extensive structurally controlled and pervasive stratabound hydrothermal iron ore deposits on the farms Leeuwbosch and Cornwall, chiefly consisting of high-grade hematite with rare relict magnetite, show a wide compositional variability due to episodic fluid mixing and successive hydrothermal activity in the presence of several distinct fluid end members. Total salinities of fluid inclusions in quartz from the hematite deposits range from 9.2 to 39.9wt.% NaCl eq. with highly variable proportions of NaCl and CaCl
2 and minimum formation temperatures are between 100 and 190°C. The estimated formation conditions for the iron ore deposits are 175°C and 1kbar. Stable isotopes of gangue calcite indicate that diagenetic fluids with δ
13C
vs. PDB from -3.33 to -2.09 and δ
18O
vs. SMOW from 2.52 to 5.60‰ and a second fluid with δ
13C
vs. PDB of -7.45 and δ
13C
vs. PDB of 17.45 were controlling the formation of the hematite deposits. In agreement with oxidized conditions during hematite formation and characteristic host rock alteration patterns traced by carbon and oxygen isotopes, the second low salinity fluid was derived from the overlying Waterberg Group sandstones and played an important role in the formation of the iron ore deposits, in addition to high salinity diagenetic brines. Iron was leached from the BIFs of the Penge Formation, transported as FeCl
+ under mildly acidic conditions and likely deposited in response to the oxidation of the iron-bearing fluids. The lead and iron ore deposits formed by combinations of structural controls which influenced the regional fluid flow patterns and fluid compositions, and fluid-rock interaction with reactive carbonate lithologies of the Malmani Subgroup which acted as a sink for metals transported in acidic hydrothermal solutions. © 2014 Elsevier B.V.},
author = {Moeller, V. and Klemd, Reiner and Joachimski, Michael and Barton, J. M.},
doi = {10.1016/j.oregeorev.2014.04.009},
faupublication = {yes},
journal = {Ore Geology Reviews},
keywords = {Fluid inclusions; Galena; Hematite; Leeuwbosch; Stable isotopes; Thabazimbi},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LG.hydrot},
pages = {40-63.},
peerreviewed = {Yes},
title = {{Hydrothermal} controls on iron and lead mineralization on the farms {Leeuwbosch} and {Cornwall}, {Thabazimbi} {District}, {South} {Africa}},
volume = {63},
year = {2014}
}
@article{faucris.110730224,
author = {Joachimski, Michael and Buggisch, Werner},
faupublication = {yes},
journal = {Geology},
note = {UnivIS-Import:2015-03-05:Pub.1999.nat.dgeo.IGM.LG.hydrot},
pages = {863},
peerreviewed = {Yes},
title = {{Hydrothermal} origin of {Devonain} conical mounds (kess-kess) of {Hamar} {Laghdad} {Ridge}, {Anti}-{Atlas}, {Morocco}. {Comment}.},
year = {1999}
}
@article{faucris.111760924,
abstract = {A high-resolution and continuous conodont apatite oxygen isotope record spanning the late Viséan to Middle Permian is reported from South China, which is interpreted with respect to the ice volume and/or tropical seawater temperature history of the Late Paleozoic Ice Age (LPIA). The presented δO record shows significant fluctuations in δO from the late Viséan to Middle Permian with highest values observed in the Bashkirian (Early Pennsylvanian). The δO maximum coincides with a major eustatic sea level fall recorded in low-latitude successions and postdates the significant increases in Sr/Sr and δC measured on well-preserved brachiopod calcite, which can be interpreted as reflecting intensified weathering as consequence of the closure of Rheic Ocean as well as enhanced carbon burial. Both processes may have contributed to lower greenhouse gas levels and cooled down the Earth's surface, triggering the maximum glaciation. The high Bashkirian δO values are interpreted to represent the glacial maximum of the LPIA. A coeval change in faunal composition and a decreasing diversity in climate-sensitive marine invertebrates can be ascribed to icehouse cooling and/or loss of habitat. Despite inconsistencies with earlier interpretations that the Early Permian represented the glacial maximum of the LPIA as inferred from Gondwanan glacial sediments records, the suggested Bashkirian glacial maximum agrees well with ice extent estimates based on the regional tectonic history in Gondwana, which suggests that the Bashkirian glaciation occurred during Gondwana interior uplift promoting maximum ice cover of the entire LPIA. However, maximum glaciation is only poorly represented in the depositional record because large parts of the glacial deposits were possibly removed by erosion as outlined by a major regional unconformity.},
author = {Chen, Bo and Joachimski, Michael and Wang, Xiangdong and Shen, Shuzhong and Qi, Yueping and Qie, W.},
doi = {10.1016/j.palaeo.2016.01.002},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Bashkirian; Conodont apatite; Late Palaeozoic Ice Age; Maximum glaciation; Naqing section; Oxygen isotopes},
pages = {151-161},
peerreviewed = {Yes},
title = {{Ice} volume and paleoclimate history of the {Late} {Paleozoic} {Ice} {Age} from conodont apatite oxygen isotopes from {Naqing} ({Guizhou}, {China})},
volume = {448},
year = {2016}
}
@article{faucris.245715910,
abstract = {In this paper we study the Lilang Super Group in the Spiti area, Indian Himalaya to understand environmental changes in the aftermath of the end-Permian mass extinction. We focus on the Mikin and Kaga Formations, which span the Induan to Ladinian stages of the Lower and Middle Triassic. These strata formed on the southern mid-palaeolatitude margin of East Gondwana and are interpreted as condensed, mixed carbonate – siliciclastic ramp deposits that deepened distally. Carbon isotope ratios of carbonate (δ13Ccarb) show an increase from −2.6 to 0‰ from the Griesbachian substage to the Dienerian-Smithian transition, followed by a negative shift to −3‰ in the Smithian substage and a large positive excursion from −3.0 to 3.5‰ across the Smithian-Spathian boundary. A short negative shift to −1.0‰ occurred in the early Spathian substage, and is followed by a positive trend from ~−1.0 to 1.0‰ in the Middle Triassic, with several minor excursions occurring during the Aegean substage. Carbon isotope ratios of total organic carbon (δ13Corg) co-vary with δ13Ccarb, suggesting that both proxies represent the original isotopic signatures. Sedimentary and palaeontological evidence, as well as trace metal geochemistry (Mo/Al ratio), indicate anoxic conditions developed from the late Griesbachian to the Dienerian substages, and dysoxic to probably fully oxic conditions from the late Dienerian substage onward. Anoxic conditions only very briefly reoccurred in the late Smithian substage. Ti/Ca and Zr/Al ratios suggest a consistently high terrestrial input in the first three substages of the Early Triassic, followed by a decrease across the Smithian–Spathian boundary. Thus, in the Spiti area, the positive δ13Ccarb excursion across the Smithian–Spathian boundary is recorded in generally well‑oxygenated sediments and coincides with a decrease in terrestrial input. While evidence for enhanced weathering is lacking, observations are strongly at odds with studies postulating eutrophication as a universal kill mechanism for the Smithian–Spathian crisis. The strata in the Spiti area contain an Early Triassic gap in phosphorite deposition indicating a ~ 5 Myr waning of coastal upwelling in an otherwise persistent (>100 Myr) upwelling zone of the East Gondwana margin. The phosphorite gap suggests low P availability, low rates of organic matter degradation, and a reduction in nutrient exchange between deep and surface water masses. Altogether, the phosphorite gap, the paucity of sessile and filtering fauna in oxygenated waters, and low organic carbon burial rates indicate a collapse in marine productivity in the aftermath of the end-Permian mass extinction.
13Corg chemostratigraphy, and clarify their stratigraphic relations, through this ~90 m thick interval, which is developed within a black shale facies. The lithology, biostratigraphy and chemostratigraphy are closely similar to those of the coeval strata in the Fågelsång area, southcentral Scania, including the presence of the Fågelsång Phosphorite, which was previously unrecorded in the Röstånga area. The new data are particularly important in providing evidence of the relations between graptolite biostratigraphy and δ
13Corg chemostratigraphy. The Fågelsång3 and Röstånga2 drill core successions are currently the only Darriwilian sequences in the world where these relations have been well established.},
author = {Bergström, Stig M. and Ahlberg, Per and Maletz, Jörg and Lundberg, Frans and Joachimski, Michael},
doi = {10.3176/earth.2020.08},
faupublication = {yes},
journal = {Estonian Journal of Earth Sciences},
keywords = {Baltoscandia; Black shale; Chemostratigraphy; Ordovician; Outer shelf; Phosphorite; Regional correlation},
note = {CRIS-Team Scopus Importer:2020-06-16},
pages = {121-133},
peerreviewed = {Yes},
title = {{Integration} of darriwilian ({Middle} ordovician) {δ13Corg} chemostratigraphy with graptolite biostratigraphy in the classical {Röstånga} area in northwestern {Scania} (southern {Sweden})},
volume = {69},
year = {2020}
}
@article{faucris.238675754,
author = {Bergström, Stig M. and Ahlberg, Per and Maletz, Jörg and Lundberg, Franz and Joachimski, Michael},
doi = {10.3176/earth.2020.08},
faupublication = {yes},
journal = {Estonian Journal of Earth Sciences},
pages = {121-133},
peerreviewed = {Yes},
title = {{Integration} of {Darriwilian} ({Middle} {Ordovician}) {δ13Corg} chemostratigraphy with graptolite biostratigraphy in the classical {Röstånga} area in northwestern {Scania} (southern {Sweden})},
volume = {69},
year = {2020}
}
@article{faucris.282317293,
abstract = {The Carnian Humid Episode (CHE) represents a dramatic dry to wet climate transition in the Late Triassic. Manifestations of this climate shift and its associated biological and environmental responses are not fully understood. Here, we carried out carbonate carbon isotope, trace metal, and pyrite framboid analyses at Wolonggang in southwest China to trace palaeoenvironmental changes during this critical interval. The CHE at Wolonggang is marked by the development of fine laminated carbonaceous siltstones and black shales overlying the intensely bioturbated Zhuganpo limestone deposited in the latest Julian 1. This lithological change is accompanied by two negative δ13Ccarb excursions, a strong enrichment of redox-sensitive trace metals U and Mo, and the development of abundant small pyrite framboids with an average diameter < 5 μm. The sedimentary and geochemical evidence collectively suggest a sharp decrease in carbonate production and a major carbon cycle disturbance, coinciding with the onset of intense ocen anoxia and the mass mortality of burrowing faunas. Unlike other areas in the western Tethys, the aftermath of the CHE at Wolonggang is characterized by long-lasting ocean anoxia, with weak carbonate production persisting at least to the late Tuvalian. This is evidenced by the deposition of finely laminated silty carbonates, marls, and carbonaceous siltstones with rare benthic fossils in the Wayao Formation. Our study suggests that anoxic-euxinic environments widely developed along the southwest margins of the Yangtze Platform and in the Nanpanjiang Basin, probably contributing to the loss of marine faunas during the CHE.
13C variations during the Late Carboniferous to Late Permian. The presented high resolution isotope curves are based on 1299 δ
13C
carb and 396 δ
13C
org analyses. The carbon isotope record of diagenetically unaltered samples from the Carnic Alps (Austria) and Karavanke Mountains (Slovenia) shows generally high δ
13C values, but Late Carboniferous and Early Permian successions are affected by a diagenetic alteration as consequence of glacio-eustatic sea level changes. Negative δ
13C excursions are related to low-stand deposits and caused by diagenetic processes during subaerial exposure. The comparison with δ
13C records from other parts of the world demonstrate that δ
13C values are high in most unaltered samples, an overall negative trend during the Permian, as recently published, is not obvious and negative excursions related to changes in the carbon isotope composition of the global oceanic carbon pool cannot be confirmed, except for the Permian-Triassic boundary interval.},
author = {Buggisch, Werner and Krainer, Karl and Schaffhauser, Maria and Joachimski, Michael and Korte, Christoph and Joachimski, Michael},
doi = {10.1016/j.palaeo.2015.05.012},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Carbon isotopes; Carboniferous; Diagenesis; Permian},
pages = {174-190},
peerreviewed = {Yes},
title = {{Late} {Carboniferous} to {Late} {Permian} carbon isotope stratigraphy: {A} new record from post-{Variscan} carbonates from the {Southern} {Alps} ({Austria} and {Italy})},
volume = {433},
year = {2015}
}
@article{faucris.226611829,
author = {Zhang, Xinsong and Joachimski, Michael and Over, D. Jeffrey and Ma, Kunyuan and Huang, Cheng and Gong, Yiming},
doi = {10.1016/j.gloplacha.2019.103024},
faupublication = {yes},
journal = {Global and Planetary Change},
keywords = {Bio-events; Plants; Stable carbon isotopes; Famennian; Frasnian; Tectonics},
peerreviewed = {Yes},
title = {{Late} {Devonian} carbon isotope chemostratigraphy: {A} new record from the offshore facies of {South} {China}},
volume = {182},
year = {2019}
}
@article{faucris.260104282,
abstract = {The Late Devonian is considered as a crucial climatic transition from the Devonian greenhouse to Carboniferous icehouse. Published Late Devonian marine palaeotemperature records are mainly based on conodont δ18Oapatite data from the Rheic Ocean. In order to reconstruct palaeotemperature variations in the eastern Palaeotethys, oxygen isotopes were measured on the latest Givetian to latest Famennian conodonts from the Lali section (South China). Assuming constant seawater δ18O, the early to middle Frasnian is marked by a warming trend (−1.5‰ shift in δ18Oapatite), with warmest temperatures reconstructed in FZ 11 (FZ = Frasnian Zonation). Late Devonian cooling during the middle to late Famennian (
velifer to
ultimus Zone) is documented by a long-term positive δ18Oapatite shift of +2‰. This increase corresponds to a similar δ18Oapatite increase in the Rheic Ocean and can be explained by cooling as well as the formation of ice masses as evidenced by the occurrence of glacial sediments in Gondwana and Euramerica during the late Famennian. The Late Devonian δ18Oapatite record largely matches 2nd-order T-R cycles. The δ18Oapatite record from the Lali section shows several short-term positive excursions coinciding with Late Devonian bio-events as the Middlesex (+0.5‰ δ18Oapatite), Lower Kellwasser (+1‰ δ18Oapatite) and Upper
annulata (+0.8‰ δ18Oapatite) events. However, due to the lower sampling resolution of the F-F (Frasnian-Famennian) boundary interval, we did not recognize a positive shift in δ18Oapatite for the Upper Kellwasser event as reported from other sections.
13C excursions that can be used for intra- as well as inter-continental correlations. A positive excursion in the Tøyen Shale probably correlates to the mid-late Floian and the Oepikodus evae Zone in Baltica and Precordillera, and the Reutterodus andinus Zone in North America. A continuous increase in δ
13C values through the upper Holen Limestone and the preserved part of the overlying Segerstad Limestone is interpreted as the rising limb of the Middle Darriwilian Isotope Carbon Excursion (MDICE), an important tie-point for the global correlation of the Jämtland strata. Negative δ
13C values associated with the Latorp Limestone may correlate with similar low values in the late Tremadocian and early Floian of the Argentine Precordillera and the Shingle Pass and Ibex sections in North America.},
author = {Wu, R. and Calner, Michael and Lehnert, Oliver and Petterfy, O. and Joachimski, Michael},
doi = {10.1016/j.palwor.2015.01.003},
faupublication = {yes},
journal = {Palaeoworld},
keywords = {Carbon isotope chemostratigraphy; MDICE; Ordovician; Sweden},
pages = {110-122},
peerreviewed = {Yes},
title = {{Lower}-{Middle} {Ordovician} δ
13{C} chemostratigraphy of western {Baltica} ({Jämtland}, {Sweden})},
volume = {24},
year = {2015}
}
@article{faucris.107076684,
author = {Prasad, V. and Utescher, T. and Sharma, A. and Singh, I. B. and Garg, R. and Gogoi, B. and Srivastava, J. and Uddandam, P. R. and Joachimski, Michael},
doi = {10.1016/j.palaeo.2018.02.013},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Climate change; Paleotropics; Palynology; PETM; Precipitation; Rainforest},
pages = {139-156},
peerreviewed = {Yes},
title = {{Low}-latitude vegetation and climate dynamics at the {Paleocene}-{Eocene} transition - {A} study based on multiple proxies from the {Jathang} section in northeastern {India}},
volume = {497},
year = {2018}
}
@article{faucris.289284137,
abstract = {Ocean anoxia was one of the key killing mechanisms responsible for the end-Permian mass extinction (~252 Ma). However, the temporal evolution and the triggering mechanisms of the end-Permian anoxia are controversial, with the current view being that the water column deoxygenation was a spatially and temporally heterogeneous event. Here, we use cerium-anomalies, uranium contents and rare earth element and yttrium (REY) compositions measured on the carbonate fraction of samples from two marine sections in Armenia and South China to constrain the evolution of end-Permian marine anoxia. In particular, we attempt to identify intervals of manganous redox conditions (i.e., Mn2+-rich water column). These are characterized by the reduction of Mn(IV)-oxides at a redox potential lower than of nitrate and higher than of Fe(III)-oxide reduction. Most of our samples yield REY patterns with seawater characteristics suggesting the dominance of hydrogenous REYs. While decreasing U concentrations in the C. yini Zone suggest an overall intensification of global marine anoxia in the latest Permian, Ce-anomalies shift from negative to positive above the C. yini Zone, implying a deterioration in the oxygen content of the local water columns. Highly positive Ce-anomalies (Ce/Ce* > 1.3) are firstly reported for the P-T interval, indicating enrichment of Ce in the water column and the establishment of manganous redox conditions at both locations. This change coincided globally with climatic warming, the onset of the marine extinction interval as well as locally with the disappearance of sponge spicules and radiolarians (South China) and the appearance of microbialites (Armenia).
13C and δ
18O. Carbon isotope data highlight environmental changes across the P-T boundary and show the following features: (1) a gradual decrease of ∼4‰ to more than 7‰ starting in the Late Permian (Changhsingian) C. bachmanni Zone, with two superimposed transient positive excursions in the C. meishanensis-H. praeparvus and the M. ultima-S. ? mostleri Zones; (2) two δ
13C minima, the first at the P-T boundary and a higher, occasionally double-minimum in the lower I. isarcica Zone. It is unlikely that the short-lived phenomena, such as a breakdown in biological productivity due to catastrophic mass extinction, a sudden release of oceanic methane hydrates or meteorite impact(s), could have been the main control on the latest Permian carbon isotope curve because of its prolonged (0.5 Ma) duration, gradual decrease and the existence of a >1‰ positive shift at the main extinction horizon. The P-T boundary δ
13C trend matches in time and magnitude the eruption of the Siberian Traps and other contemporaneous volcanism, suggesting that volcanogenic effects, such as outgassed CO
2 from volcanism and, even more, thermal metamorphism of organic-rich sediments, as the likely cause of the negative trend. © 2009 Elsevier Ltd. All rights reserved.},
author = {Korte, Christoph and Pande, Prabhas and Kalia, P. and Kozur, Heinz W. and Joachimski, Michael and Oberhaensli, Hedi},
doi = {10.1016/j.jseaes.2009.08.012},
faupublication = {yes},
journal = {Journal of Asian Earth Sciences},
keywords = {Abadeh; Carbon isotopes; Guryul Ravine; Oxygen isotopes; Permian-Triassic boundary; Pufels/Bula/Bulla; Volcanism},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LG.massiv},
pages = {299-311},
peerreviewed = {Yes},
title = {{Massive} volcanism at the {Permian}-{Triassic} boundary and its impact on the isotopic composition of the ocean and atmosphere},
volume = {37},
year = {2010}
}
@article{faucris.247912299,
abstract = {The Cambrian succession of the Tingskullen drill core from northern Öland comprises Cambrian Series 2 and Miaolingian (Wuliuan Stage) siliciclastic strata. The major portion of the succession is represented by the Miaolingian Borgholm Formation, which, in ascending order, is subdivided into the Mossberga, Bårstad and Äleklinta members. The Äleklinta Member is barren of body fossils, whereas the Mossberga and Bårstad members are moderately to highly fossiliferous and biostratigraphically reasonably well constrained. Trilobites and agnostoids from the Bårstad Member are indicative of the Acadoparadoxides pinus Zone. The Mossberga Member has not yielded any zonal guide fossils but is tentatively assigned to the Eccaparadoxides insularis Zone. A δ13Corg curve throughout the Borgholm Formation shows a general positive trend up-section without any distinctive excursion, suggesting that the Wuliuan Acadoparadoxides (Baltoparadoxides) oelandicus Superzone (the ‘Oelandicus beds’) of Öland is younger than the negative Redlichiid–Olenellid Extinction Carbon isotope Excursion (ROECE), which is known from near the top of Stage 4 and close to the traditional ‘Lower–Middle Cambrian boundary’ in several parts of the world.
13C and δ
18O analyses were performed on carbonates from veins and filled-voids in tuffs.Our results provide information on the hydrothermal system in the eastern sector of the caldera that was not among the goals in the previous drilling programs. Secondary mineralization suggests a saline hydrothermal environment characterized by fluids that progressively evolved from boiling toward more alkaline and cooler conditions. A paleo-temperature of ca. 160. °C has been inferred from authigenic mineral occurrences and calculated on the basis of equilibria between cored calcites and fluids presently emitted at the surface, by using carbon and oxygen isotope data. The temperature measured at the bottom of the drilling is about 80. °C.},
author = {Mormone, A. and Troise, Claudia and Piochi, M. and Balassone, G. and Joachimski, Michael and De Natale, Giuseppe},
doi = {10.1016/j.jvolgeores.2014.12.003},
faupublication = {yes},
journal = {Journal of Volcanology and Geothermal Research},
keywords = {Campi Flegrei; Core samples; Geothermal field; Hydrothermal activity; Pilot-hole},
note = {UnivIS-Import:2015-07-08:Pub.2015.nat.dgeo.IGM.LG.minera},
pages = {39-52},
peerreviewed = {Yes},
title = {{Mineralogical}, geochemical and isotopic features of tuffs from the {CFDDP} drill hole: hydrothermal activity in the eastern side of the {Campi} {Flegrei} volcano (southern {Italy}).},
volume = {290},
year = {2015}
}
@article{faucris.123230184,
author = {Buggisch, Werner and Joachimski, Michael and Sevastopulo, George and Morrow, Jared R.},
doi = {10.1016/j.palaeo.2008.03.043},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
note = {UnivIS-Import:2015-03-09:Pub.2008.nat.dgeo.IGM.LG.missis},
pages = {273-292},
peerreviewed = {Yes},
title = {{Mississippian} {d13Ccarb} and conodont apatite {d18O} records - {Their} relation to the {Late} {Palaeozoic} {Glaciation}},
volume = {268},
year = {2008}
}
@article{faucris.111774124,
abstract = {A model of global biogeochemical cycles coupled to an energy-balance climatic model (modified after the COMBINE model; [Goddéris, Y., Joachimski, M.M., 2004. Global change in the Late Devonian: modeling the Frasnian-Famennian short-term carbon isotope excursions. Palaeogeogr. Palaeoclimatol. Palaeoecol. 202, 309-329]) is used to calculate the short-term evolution of atmospheric pCO
2 during the Devonian. The geochemical cycles for carbon, alkalinity, phosphorus, sulfur and oxygen are included in this model, with also
13C and
34S cycles. High-resolution records of δ
13C of marine carbonates and δ
34S of marine sulfates are used as forcing parameters of the geochemical cycles in an inverse modeling. Atmospheric pCO
2 and pO
2 at the end of the Silurian are calculated to have been 3000 ppmv and 0.165 bar (0.75 PAL), respectively. A long-term decrease in pCO
2 is modeled for almost the entire Devonian. Short-term lowering of pCO
2 to concentrations around 2000 ppmv is calculated for the Silurian-Devonian transition and the Pragian. Contents around 900 ppmv are modeled for the Eifelian-Givetian, Givetian-Frasnian and Frasnian-Famennian boundaries as a consequence of enhanced organic carbon burial during deposition of Lochkovian, Eifelian, and Frasnian grey and black shales. Organic carbon burial is enhanced by the increase of phosphorus delivery to the ocean triggered by short-term sea-level falls. The corresponding short-term global climatic cooling at the Silurian-Devonian boundary, at the end of the Pragian, and the Givetian-Frasnian as well as Frasnian-Famennian boundaries reached 2 °C at the equator. The rapid colonization of continental surface by land plants during the Middle and Late Devonian, increasing chemical alteration of the continents and CO
2 consumption by silicate weathering, is assumed to have caused cooling of surface seawater, as suggested by the δ
18O values of biogenic apatites. © 2007 Elsevier B.V. All rights reserved.},
author = {Buggisch, Werner and Joachimski, Michael and et al.},
author_hint = {Simon. L., Godderis Y., Buggisch Werner, Strauss. H., Joachimski Michael},
doi = {10.1016/j.chemgeo.2007.08.014},
faupublication = {yes},
journal = {Chemical Geology},
keywords = {Carbon; Carbon dioxide; Devonian; Isotope ratios; Modeling; Sulfur},
note = {UnivIS-Import:2015-03-09:Pub.2007.nat.dgeo.IGM.LG.modeli},
pages = {19-38},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Modeling} the carbon and sulfur isotope compositions of marine sediments: climate evolution during the {Devonian}.},
volume = {246},
year = {2007}
}
@article{faucris.116649984,
author = {Joachimski, Michael and et al.},
author_hint = {Hornung T., Spatzenberger A., Joachimski Michael},
faupublication = {yes},
journal = {Facies},
note = {UnivIS-Import:2015-03-09:Pub.2007.nat.dgeo.IGM.LG.multis},
pages = {267-292},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Multistratigraphy} of condensed ammonoid beds of the {Rappoltstein} ({Berchtesgaden}, {Southern} {Germany}): unravelling palaeo-environmental conditions on {Hallstatt} deep swells during the {Reingraben} {Event} (late {Lower} {Carnian})},
volume = {53},
year = {2007}
}
@article{faucris.107162704,
abstract = {Skorpion and Rosh Pinah Zn-(Pb) deposits are hosted in Neoproterozoic rocks that are part of a volcano-sedimentary sequence within the Gariep Belt of southwest Namibia. Skorpion is the largest Zn-nonsulphide mineralization ever discovered. It formed from weathering and oxidation of a volcanic hosted massive sulphide (VMS) protore and mostly consists of Zn-oxidized minerals. Rosh Pinah is a hybrid Zn massive sulphide deposit, with some VMS and Broken Hill-type characteristics and partly weathered in the uppermost part of the massive sulphide lens. We compared the deep oxidation process that occurred at Skorpion with the limited weathering of the Rosh Pinah deposit by studying the carbon and oxygen isotope ratios of supergene carbonates minerals. Twenty three smithsonite samples from the Skorpion deposit and 6 gossanous samples (containing both host dolomite and smithsonite) from the uppermost levels of the Rosh Pinah mine have been analysed. The Skorpion smithsonites form botryoidal crusts overgrown by euhedral calcite crystals. At Rosh Pinah all sampled smithsonites occur in veins within the dolostone host rock. Skorpion smithsonite is characterized by δC values strongly variable between −9.1‰ and 0.1‰ VPDB and by a small range in δO from 28.0 to 29.9‰ VSMOW. Calcite shows a minor variation in δC with values being generally positive (0–1.6‰ VPDB) and δO values slightly lower than those of smithsonite (25.4–27.1‰ VSMOW). The analyses of the Rosh Pinah samples show that the host dolomite is characterized by δO values ranging from 18.7 to 22.0‰ VSMOW and by negative δC values (−5.9 to −2.7‰ VPDB). The carbon isotope ratios of smithsonite, as in Skorpion, are negative (−2.8 to −1.9‰ VPDB) and partly overlapping with those of the host dolomites. The δO values (26.7–29.0‰ VSMOW) are on average comparable with the values measured at Skorpion. The similar negative δC values of smithsonite and dolomite at Rosh Pinah point to the involvement of both re-oxidized organic carbon and host dolomite inorganic carbon during smithsonite formation, whereas at Skorpion a larger contribution of isotopically light organic carbon is considered more probable. The comparable δO compositions of smithsonite from the two deposits imply similar ore-forming fluids and/or similar temperatures conditions during formation. In agreement with former studies, we suggest that Skorpion smithsonite precipitated at an average temperature near 17 °C from fluids depleted in C due to a high contribution of soil organic carbon, either during the first (Late Cretaceous-Paleocene) or the last humid climatic stage (early-middle Miocene). Even if the similarity between the δO composition of Rosh Pinah and Skorpion smithsonites points to similar ore-forming fluids and/or similar conditions during formation, the relatively high δC values of the Rosh Pinah smithsonites suggest a minor influence of isotopically light organic carbon and the absence of soils over this deposit. Combining these data with the limited thickness of the supergene zone over the latter orebody, it is likely that the Rosh Pinah smithsonites, together with the gossan in which they occur, formed at the end of the early-middle Miocene semi-humid period. The δO and δC compositions of Skorpion calcite indicate that the precipitating supergene fluids remained roughly unchanged, but that the bicarbonate from the host rock became prevailing. This suggests that calcite formation occurred at the beginning of the last late Miocene-Pliocene semi-arid period, when the host marbles were uplifted and karstified, thus promoting a higher bicarbonate contribution from dissolving host rock.},
author = {Arfè, G. and Boni, M. and Balassone, G. and Mondillo, N. and Hinder, G. and Joachimski, Michael},
doi = {10.1016/j.jafrearsci.2016.11.022},
faupublication = {yes},
journal = {Journal of African Earth Sciences},
keywords = {Namibia; Paleoclimate; Rosh Pinah; Skorpion; Smithsonite; Stable isotopes; Zn deposit},
pages = {148-158},
peerreviewed = {Yes},
title = {{New} {C} and {O} isotopic data on supergene minerals from the {Skorpion} and {Rosh} {Pinah} ore deposits ({Namibia}): {Genetic} and paleoclimatic constraints},
volume = {126},
year = {2017}
}
@article{faucris.121006864,
abstract = {1. During copulation male katydids transfer a protein-rich nuptial gift to females, which is ingested by the female. We hypothesized that female katydids are built at least partly from proteins assimilated from nuptial gifts. 2. We measured the ratio of nitrogen isotopes (δ
15N) in the diet and tissue of sexually reproducing Isophya kraussii and obligate parthenogenetically reproducing Poecilimon intermedius. We used the δ
15N of muscles as an indicator of the most recent diet and the δ
15N of the cuticula as an indicator of the larval diet. 3. In free-ranging I. kraussi, muscular and cuticular δ
15N of adult males was low, suggesting a plant diet. Cuticular δ
15N did not differ between sexes, indicating that immatures of both sexes fed on similar diets. Female muscles were significantly more enriched in nitrogen-15 than female cuticula and also than male muscles, suggesting that adult females incorporated animal proteins and immature females plant material. 4. Female I. kraussii that were kept with males in captivity had higher δ
15N in muscular tissue than in cuticula. Muscular δ
15N of these females was also higher than that of muscle and cuticula of females held isolated from males, suggesting that incorporated nitrogen originated from nuptial gifts. 5. In parthenogenetically reproducing P. intermedius muscular and cuticular δ
15N was almost identical, suggesting no additional uptake of insect proteins in the absence of nuptial gifts. 6. We therefore conclude that female I. kraussii substantially assimilate spermatophylax compounds for both egg production and body homeostasis. © 2006 The Authors.},
author = {Joachimski, Michael and et al.},
author_hint = {Voigt C.C., Lehmann G.U.C., Michener R.H., Joachimski Michael},
doi = {10.1111/j.1365-2435.2006.01154.x},
faupublication = {yes},
journal = {Functional Ecology},
keywords = {Homeostasis; Isophya; Nitrogen source; Spermatophore; Stable isotopes},
note = {UnivIS-Import:2015-03-09:Pub.2006.nat.dgeo.IGM.LG.nuptia},
pages = {656-661},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Nuptial} feeding is reflected in tissue nitrogen isotope ratio in female katydids},
volume = {20},
year = {2006}
}
@article{faucris.276190235,
abstract = {The oxygen isotope compositions of carbonate and phosphatic fossils hold the key to understanding Earth-system evolution during the last 500 million years. Unfortunately, the validity and interpretation of this record remain unsettled. Our comprehensive compilation of Phanerozoic δ18O data for carbonate and phosphate fossils and microfossils (totaling 22,332 and 4615 analyses, respectively) shows rapid shifts best explained by temperature change. In calculating paleotemperatures, we apply a constant hydrosphere δ18O, correct seawater δ18O for ice volume and paleolatitude, and correct belemnite δ18O values for 18O enrichment. Similar paleotemperature trends for carbonates and phosphates confirm retention of original isotopic signatures. Average low-latitude (30° S–30° N) paleotemperatures for shallow environments decline from 42.0 ± 3.1 °C in the Early-to-Middle Ordovician to 35.6 ± 2.4 °C for the Late Ordovician through the Devonian, then fluctuate around 25.1 ± 3.5 °C from the Mississippian to today. The Early Triassic and Middle Cretaceous stand out as hothouse intervals. Correlations between atmospheric CO2 forcing and paleotemperature support CO2’s role as a climate driver in the Paleozoic.
18O and δ
13C and conodont apatite δ
18O from medial to distal carbonate ramp sediments were analysed to provide further stable isotope data from the stratotype area in the Prague Basin. The uppermost Silurian to lower Emsian δ
18O trends are put into an updated conodont biostratigraphy framework. Carbonate δ
18O and δ
13C are discussed in the context of facies-dependent diagenesis. The δ
13C pattern measured from different sections enables the correlation of intervals with development of different facies inside the Prague Basin. Positive δ
13C shifts are often coupled with trends of decreasing computed gamma-ray (CGR) values interpreted as regressions, whereas negative δ
13C shifts commonly coincide with opposite trends in CGR. The Lochkovian-Pragian boundary interval coincided with an increase in carbonate δ
13C and an increase in the δ
18O of conodont apatite and carbonate, which we interpret as consequence of climate cooling. Generally, the Lochkovian was warmer than the Pragian and earliest Emsian.},
author = {Weinerová, Hedvika and Bábek, Ondřej and Slavík, Ladislav and Vonhof, Hubert and Joachimski, Michael and Hladil, Jindřich},
doi = {10.1016/j.palaeo.2020.110036},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Barrandian area; Carbonate; Climate changes; Conodont apatite; Diagenesis; Palaeozoic},
note = {CRIS-Team Scopus Importer:2020-10-09},
peerreviewed = {Yes},
title = {{Oxygen} and carbon stable isotope records of the {Lochkovian}-{Pragian} boundary interval from the {Prague} {Basin} ({Lower} {Devonian}, {Czech} {Republic})},
volume = {560},
year = {2020}
}
@article{faucris.113113484,
abstract = {Fossil shark remains occur in both marine and nonmarine Late Palaeozoic deposits, therefore their palaeoecology is controversial. The oxygen and strontium isotopic composition of biogenic fluorapatite in 179 teeth, scales and spines predominantly of hybodontid (Lissodus) and xenacanthiform (Orthacanthus, Xenacanthus, Bohemiacanthus, Triodus) sharks from various Late Carboniferous (Moscovian) to Early Permian (Artinskian) basins of Europe are used as ecological tracers to decipher diadromous or obligate freshwater lifestyle of the investigated taxa. The δ
18O
P values of the different shark teeth range from 11.7 to 20.2‰ within the different basins with mean values of 16.9±0.5‰ for the Bohemian Massif, 16.2±0.8‰ for eastern Germany, 18.2±1.0‰ for southwestern Germany, 18.5±0.7‰ for southern-central Spain, 17.6±0.4‰ for Sardinia, and 16.6±0.5‰ VSMOW for the French Massif Central. The tooth δ
18O
P values from the basins are mostly depleted by 1-5‰ relative to those of shark teeth from contemporaneous marine settings. Oxygen isotope signatures of co-occurring taxa do not show systematic differences excluding habitat effects for different shark groups. However, distinctly higher δ
18O
P values from Puertollano and Saar-Nahe can be attributed to significant evaporative enrichment in
18O of the ambient water in the ancient lacustrine environments due to a warm and dry climate and sufficient residence time in the basins. The strontium isotopic composition of the teeth varies between 0.70824 and 0.71216 with a mean value of 0.71031. These
87Sr/
86Sr ratios are always more radiogenic in comparison to the
87Sr/
86Sr record of seawater of their stratigraphic age. Overall, the investigated tooth samples yield low δ
18O
P and high
87Sr/
86Sr values deviating from bioapatite values expected for contemporaneous marine vertebrates and typical for freshwater settings. This indicates a fully freshwater adapted lifestyle for a variety of fossil shark taxa in Late Palaeozoic European basins. © 2013 Elsevier B.V.},
author = {Fischer, Jan and Schneider, Joerg W. and Voigt, Silke and Joachimski, Michael and Tichomirowa, Marion and Tuetken, Thomas and Goetze, Jens and Berner, Ulrich},
doi = {10.1016/j.chemgeo.2013.01.022},
faupublication = {yes},
journal = {Chemical Geology},
keywords = {Bioapatite; Carboniferous; Freshwater shark; Oxygen isotopes; Permian; Strontium isotopes},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LG.oxygen},
pages = {44-62},
peerreviewed = {Yes},
title = {{Oxygen} and strontium isotopes from fossil shark teeth: environmental and ecological implications for {Late} {Palaeozoic} {European} basins.},
volume = {342},
year = {2013}
}
@article{faucris.121068684,
author = {Haase, Karsten and Krumm, Stefan and Regelous, Marcel and Joachimski, Michael},
doi = {10.1016/j.epsl.2011.07.014},
faupublication = {yes},
journal = {Earth and Planetary Science Letters},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LG.oxygen},
pages = {348-355},
peerreviewed = {Yes},
title = {{Oxygen} isotope evidence for the formation of silicic {Kermadec} island arc and {Havre}-{Lau} backarc magmas by fractional crystallization.},
volume = {309},
year = {2011}
}
@article{faucris.111750804,
abstract = {Oxygen isotope ratios of well-preserved brachiopod calcite and conodont apatite were used to reconstruct the palaeotemperature history of the Middle and Late Devonian. By assuming an oxygen isotopic composition of -1‰ V-SMOW for Devonian seawater, the oxygen isotope values of Eifelian and early Givetian brachiopods and conodonts give average palaeotemperatures ranging from 22 to 25 °C. Late Givetian and Frasnian palaeotemperatures calculated from δO values of conodont apatite are close to 25 °C in the early Frasnian and increase to 32 °C in the latest Frasnian and early Famennian. Oxygen isotope ratios of late Givetian and Frasnian brachiopods are significantly lower than equilibrium values calculated from conodont apatite δO values and give unrealistically warm temperatures ranging from 30 to 40 °C. Diagenetic recrystallization of shell calcite, different habitats of conodonts and brachiopods, as well as non-equilibrium fractionation processes during the precipitation of brachiopod calcite cannot explain the O depletion of brachiopod calcite. Moreover, the O depletion of brachiopod calcite with respect to equilibrium δO values calculated from conodont apatite is too large to be explained by a change in seawater pH that might have influenced the oxygen isotopic composition of brachiopod calcite. The realistic palaeotemperatures derived from δO may suggest that biogenic apatite records the oxygen isotopic composition and palaeotemperature of Palaeozoic oceans more faithfully than brachiopod calcite, and do not support the hypothesis that the O/O ratio of Devonian seawater was significantly different from that of the modern ocean. © Springer-Verlag 2004.},
author = {Joachimski, Michael and Geldern, Robert and Breisig, Stephan and Buggisch, Walter and Day, Jed and van Geldern, Robert},
doi = {10.1007/s00531-004-0405-8},
faupublication = {yes},
journal = {International Journal of Earth Sciences},
keywords = {Brachiopod calcite; Conodont apatite; Devonian; Oxygen isotopes; Palaeotemperature},
pages = {542-553},
peerreviewed = {Yes},
title = {{Oxygen} isotope evolution of biogenic calcite and apatite during the {Middle} and {Late} {Devonian}},
volume = {93},
year = {2004}
}
@article{faucris.118717764,
abstract = {Oxygen isotope values of the extant Caribbean coralline sponge Ceratoporella nicholsoni are compared with published temperatures and δ
18O of water calculated from salinities. The measured values from aragonitic sponge skeletons have a mean offset of 1.0 ± 0.1‰ from calculated calcite equilibrium values (α(aragonite-calcite) = 1.0010). This is in good agreement with published values from synthetic aragonite. They further agree with published near-equilibrium oxygen isotope values of temperate and cold water molluscs and foraminifera extrapolated to the temperature range of the coralline sponges. These results and the mode of skeleton formation of Ceratoporella nicholsoni suggest that these sponges precipitate aragonite close to isotopic equilibrium. The temperature dependence of oxygen isotopic fractionation between the aragonite of Ceratoporella nicholsoni and water is only roughly constrained by the available data, due to the narrow temperature range of the Caribbean reef sites. However, as the data suggest oxygen isotopic equilibrium, we can calculate a well constrained temperature equation combining temperate and cold water equilibrium values from molluscs and foraminifera with our sponge data: 10
3lnα(aragonite-water) = (18.45 ± 0.4) * 10
3/T(K) - (32.54 ± 1.5) and T (°C) = (20.0 ± 0.2) - (4.42 ± 0.10) * (δ(a) - δ(w)); for 3°< T < 28°. Copyright (C) 2000 Elsevier Science Ltd.},
author = {Joachimski, Michael and et al.},
author_hint = {Böhm F., Joachimski Michael, Dullo W.C., Eisenhauer A., Lehnert H., Reitner J, Wörheide G.},
doi = {10.1016/S0016-7037(99)00408-1},
faupublication = {yes},
journal = {Geochimica Et Cosmochimica Acta},
note = {UnivIS-Import:2015-03-09:Pub.2000.nat.dgeo.IGM.LG.oxygen{\_}20},
pages = {1695-1703},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Oxygen} {Isotope} fractionation in marine aragonite of coralline sponges.},
volume = {64},
year = {2000}
}
@article{faucris.203655006,
author = {Joachimski, Michael and et al.},
author_hint = {Sharma S. , Joachimski Michael, Tobschall Heinz Jürgen, Singh I.B, Tewari D.P., Tewari R.},
doi = {10.1016/j.yqres.2004.03.003},
faupublication = {yes},
journal = {Quaternary Research},
note = {UnivIS-Import:2018-09-05:Pub.2004.nat.dgeo.IGM.LG.oxygen},
pages = {19-28},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Oxygen} isotopes of bovid teeth: archives of palaeoclimatic variations in archaeological deposits of {Ganga} {Plain}.},
year = {2004}
}
@article{faucris.116082824,
author = {Joachimski, Michael and et al.},
author_hint = {Sharma S., Joachimski Michael, Tobschall Heinz Jürgen, Singh I. B., Tewari D. P., Tewari R.},
doi = {10.1016/j.yqres.2004.03.003},
faupublication = {yes},
journal = {Quaternary Research},
note = {UnivIS-Import:2015-03-09:Pub.2004.nat.dgeo.IGM.LAG.oxygen},
pages = {19-28},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Oxygen} isotopes of bovid teeth as archives of paleoclimatic variations in archaeological deposits of the {Ganga} plain, {India}},
volume = {62},
year = {2004}
}
@incollection{faucris.254183758,
author = {Grossman, Ethan and Joachimski, Michael},
booktitle = {Geological Timescale 2020},
doi = {10.1016/B978-0-12-824360-2.00010-3},
editor = {Gradstein, F.M., Ogg, J.G., Schmitz, M.D., Ogg, G.M.},
faupublication = {yes},
isbn = {9780128243602},
pages = {207-308},
peerreviewed = {Yes},
publisher = {Elsevier},
title = {{Oxygen} {Isotope} {Stratigraphy}},
year = {2020}
}
@article{faucris.106772204,
abstract = {The Middle Jurassic sedimentary succession of the Kachchh Basin shows significant changes in lithology, faunal content and diversity across the Bathonian-Callovian boundary. The change in lithology from predominantly carbonates in the Middle and Late Bathonian to siliciclastics in the Callovian is accompanied by a drop in species diversity from high to moderate. Characteristic faunal elements of the Bathonian (corals, sponges, the bivalves Eligmus and members of the Opinae) are absent or rare in the Callovian. In contrast, Callovian sediments contain comparatively high proportions of nuculid bivalves. The clay mineral assemblage reveals prominent variations in the smectite vs. kaolinite abundance, especially during the Bathonian to Callovian transition. From the Bajocian to the Middle Bathonian, smectite becomes the dominant clay mineral and is nearly exclusively present in the Late Bathonian. Towards the Middle Callovian, its content gradually decreases and kaolinite becomes the dominant clay mineral. Illite generally is only a minor component throughout the Middle Jurassic. Based on these results, the Bajocian to Middle Bathonian time interval is interpreted to represent subtropical climatic conditions with seasonal droughts and a moderate supply of terrigenous clastics to the basin. The Late Bathonian was a period with a semi-arid climate, hot seasonal droughts and a minor input of terrigenous clastics. The increase in kaolinite contents in the Callovian suggests a subtropical humid climate with less prominent seasonal droughts and a higher input of siliclastics into the basin accompanied by a higher nutrient influx. Oxygen isotope ratios measured on Bathonian to early Callovian brachiopod shells give palaeotemperatures of 19-24°C. Callovian to Oxfordian paleotemperatures calculated from oxygen isotopes measured on belemnite rostra range from 11 to 21°C. The lower palaeotemperatures estimated from the oxygen isotopic composition of belemnite calcite are explained by assuming that the belemnites spent most of their life span in colder regions of the Malagassy Gulf and migrated into the warmer subtropical waters of the Kachchh Basin. Combining these various lines of evidence, the changes in lithology and faunal composition taking place in the Kachchh Basin during the Middle Jurassic appear to reflect largely a change towards increasing humidity rather than a distinct decrease in water temperature. © 2004 Elsevier B.V. All rights reserved.},
author = {Fürsich, Franz and Singh, Indabir and Joachimski, Michael and Krumm, Stefan and Schlirf, M and Schlirf, S.},
doi = {10.1016/j.palaeo.2004.11.026},
faupublication = {no},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Clay mineralogy; India; Jurassic; Kachchh Basin; Oxygen isotopes; Palaeoclimate; Palaeoecology},
pages = {289-309},
peerreviewed = {Yes},
title = {{Palaeoclimate} reconstructions of the {Middle} {Jurassic} of {Kachchh} (western {India}): {An} integrated approach based on palaeoecological, oxygen isotopic, and clay mineralogical data},
volume = {217},
year = {2005}
}
@article{faucris.117333084,
abstract = {The oxygen isotopic composition of conodont apatite derived from the Late Triassic (Carnian to lower Norian), Pignola 2 and Sasso di Castalda sections in the Lagonegro Basin (Southern Apennines, Italy) was studied in order to constrain the habitat of Late Triassic conodont animals. Oxygen isotope ratios of conodonts range from 18.5 to 20.8‰ V-SMOW, which translate to palaeotemperatures ranging from 22 to 31°C, assuming a δ
18O of Triassic subtropical sea water of -0.12‰ V-SMOW. These warm temperatures, which are well comparable to those of modern subtropical-tropical oceans, along with the body features of the conodont animal suggest that conodont 1 δ
8O values reflect surface water temperatures, that the studied conodont taxa lived in near-surface waters, and that δ
18O values of Late Triassic conodonts can be used for palaeoclimatic reconstructions.},
author = {Rigo, Manuel and Joachimski, Michael},
doi = {10.4202/app.2009.0100},
faupublication = {yes},
journal = {Acta Palaeontologica Polonica},
keywords = {Conodonta; Late Triassic; Oxygen isotope; Palaeoecology; Palaeotemperatures; Tethys},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LG.palaeo{\_}4},
pages = {471-478},
peerreviewed = {Yes},
title = {{Palaeoecology} of {Late} {Triassic} conodonts: {Constraints} from oxygen isotopes in biogenic apatite.},
volume = {55},
year = {2010}
}
@article{faucris.120829984,
abstract = {The oxygen and strontium isotopic composition of 125 teeth of the hybodont sharks Lissodus and Hybodus from various late Triassic (Rhaetian) bone bed localities in the Central European Basin are used as environmental and ecological tracers for the shallow epicontinental Rhaetian Sea. The preservation of tooth enameloid was ascertained by cathodoluminescence microscopy. Mean δ
18O
P values differ regionally across the Rhaetian Sea with values of 18.6±0.6‰ near the western gate, 16.1±0.8‰ in the east, 15.4±0.6‰ in the southeast, and 17.7±0.9‰ in the south. The δ
18O
P values in the eastern Rhaetian Sea are 4-5‰ lower relative to Tethyan seawater, while teeth from the southern and western parts close to the marine gates are less fractionated. The strontium isotopic composition of teeth from most localities is more radiogenic in comparison to late Triassic seawater. The observed spatial δ
18O
P trend in the Rhaetian Sea indicates a shift from marine to brackish conditions in the south and west towards extensively brackish conditions with salinities of less than 16‰ in the east, thus confirming the existence of two marine gates. Brackish conditions persisted throughout early Rhaetian times, and were maintained by increased fluvial discharge from the Vindelician-Bohemian and Fennoscandian Highs as a result of enhanced atmospheric moisture availability in the course of the Rhaetian transgression. The δ
18O
P values of Lissodus and Hybodus indicate euryhaline behaviour of Rhaetian hybodonts by exceeding modern shark intraspecific variability. The lack of accordance in δ
18O
P values between different isotopically conspicuous localities in the Rhaetian Sea contradicts a basin-wide migration pattern. Differences between co-site taxa might indicate some degree of niche partitioning. © 2012 Elsevier B.V.},
author = {Fischer, Jan and Voigt, Silke and Franz, Matthias and Schneider, Joerg W. and Joachimski, Michael and Tichomirowa, Marion and Goetze, Jens and Furrer, Heinz},
doi = {10.1016/j.palaeo.2012.07.002},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Hybodont sharks; Oxygen isotopes; Palaeoecology; Rhaetian; Salinity; Strontium isotopes},
note = {UnivIS-Import:2015-03-09:Pub.2012.nat.dgeo.IGM.LG.palaeo},
pages = {60-72},
peerreviewed = {Yes},
title = {{Palaeoenvironments} of the late {Triassic} {Rhaetian} {Sea}: {Implications} from oxygen and strontium isotopes of hybodont shark teeth},
volume = {353-355},
year = {2012}
}
@article{faucris.112205324,
author = {Lehnert, Oliver and Maennik, Peep and Joachimski, Michael and Calner, Mikael and Fryda, Jiri},
doi = {10.1016/j.palaeo.2010.01.009},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LG.paleoc},
pages = {320-331},
peerreviewed = {Yes},
title = {{Paleoclimate} perturbations before the early {Sheinwoodian} {Glaciation}: {A} trigger for extinctions during the {Ireviken} {Event}.},
volume = {296},
year = {2010}
}
@article{faucris.201739933,
author = {Girard, Catherine and Cornée, Jean Jacques and Joachimski, Michael and Charruault, Anne Lise and Dufour, Anne Béatrice and Renaud, Sabrina},
doi = {10.1016/j.palaeo.2018.06.046},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Oxygen isotopes; Palmatolepis; Famennian; Montagne Noire; Saxo-Thuringia; Sedimentary facies},
peerreviewed = {Yes},
title = {{Paleogeographic} differences in temperature, water depth and conodont biofacies during the {Late} {Devonian}},
volume = {549},
year = {2020}
}
@article{faucris.262928448,
abstract = {The Middle Devonian Epoch, ~ 393–383 million years ago, is known for a peak in diversity and highest latitudinal distribution of coral and stromatoporoid reefs. About 388 million years ago, during the late Eifelian and earliest Givetian, climax conditions were interrupted by the polyphased Kačák Episode, a short-lived period of marine dys-/anoxia associated with climate warming that lasted less than 500 kyr. Reconstruction of the seawater temperature contributes to a better understanding of the climate conditions marine biota were exposed to during the event interval. To date, conodont apatite-based paleotemperatures across the Eifelian–Givetian boundary interval have been published from Belarus, France, Germany and North America (10–36° S paleolatitude). Here we provide new δ18Oapatite data from the Carnic Alps (Austria, Italy) and the Prague Synform (Czech Republic). For better approximation of the paleotemperature record across the Kačák Episode, a latitude-dependent correction for Middle Devonian seawater δ18O is applied. Because δ18Oapatite data from shallow marine sections are influenced by regional salinity variations, calculated mean sea surface temperatures (SST) are restricted to more open marine settings (22–34° S paleolatitude). Water temperatures reach ~ 34 °C in the Prague Synform and ~ 33 °C in the Carnic Alps and suggest that SSTs of the southern hemisphere low latitudes were ~ 6 °C higher than previously assumed for this time interval.},
author = {Suttner, Thomas J and Kido, Erika and Joachimski, Michael and Vodrážková, Stanislava and Pondrelli, Monica and Corradini, Carlo and Corriga, Maria and Simonetto, Luca and Kubajko, Michal},
doi = {10.1038/s41598-021-96013-3},
faupublication = {yes},
journal = {Scientific Reports},
peerreviewed = {Yes},
title = {{Paleotemperature} record of the {Middle} {Devonian} {Kačák} {Episode}},
volume = {11},
year = {2021}
}
@article{faucris.117653404,
author = {Schobben, Martin and Joachimski, Michael and Korn, Dieter and Leda, Lucyna and Korte, Christoph},
doi = {10.1016/j.gr.2013.07.019},
faupublication = {yes},
journal = {Gondwana Research},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LG.paleot},
pages = {675-683},
peerreviewed = {Yes},
title = {{Paleotethys} seawater temperature rise and an intensified hydrological cycle following the end-{Permian} mass extinction.},
volume = {26},
year = {2014}
}
@article{faucris.106160384,
abstract = {Permian strata from the Tieqiao section (Jiangnan Basin, South China) contain several distinctive conodont assemblages. Early Permian (Cisuralian) assemblages are dominated by the genera Sweetognathus, Pseudosweetognathus and Hindeodus with rare Neostreptognathodus and Gullodus. Gondolellids are absent until the end of the Kungurian stage—in contrast to many parts of the world where gondolellids and Neostreptognathodus are the dominant Kungurian conodonts. A conodont changeover is seen at Tieqiao and coincided with a rise of sea level in the late Kungurian to the early Roadian: the previously dominant sweetognathids were replaced by mesogondolellids. The Middle and Late Permian (Guadalupian and Lopingian Series) witnessed dominance of gondolellids (Jinogondolella and Clarkina), the common presence of Hindeodus and decimation of Sweetognathus. Twenty main and seven subordinate conodont zones are recognised at Tieqiao, spanning the lower Artinskian to the middle Wuchiapingian Stage. The main (first appearance datum) zones are, in ascending order by stage: the Sweetognathus (Sw.) whitei, Sw. toriyamai, and Sw. asymmetrica n. sp. Zones for the Artinskian; the Neostreptognathodus prayi, Sw. guizhouensis, Sw. iranicus, Sw. adjunctus, Sw. subsymmeticus and Sw. hanzhongensis Zones for the Kungurian; the Jinogondolella (J.) nankingensis Zone for the Roadian; the J. aserrata Zone for the Wordian; the J. postserrata, J. shannoni, J. altudaensis, J. prexuanhanensis, J. xuanhanensis, J. granti and Clarkina (C.) hongshuiensis Zones for the Capitanian and the C. postbitteri Zone and C. transcaucasica Zone for the base and middle of the Wuchiapingian. The subordinate (interval) zones are the Pseudosweetognathus (Ps.) costatus, Ps. monocornus, Hindeodus (H.) gulloides, Pseudohindeodus ramovsi, Gullodus (G.) sicilianus, G. duani and H. excavates Zones. In addition, three new species, Gullodus tieqiaoensis n. sp., Pseudohindeodus elliptica n. sp. and Sweetognathus asymmetrica n. sp. are described. Age assignments for less common species (e.g., G. duani, H. catalanoi and Pseudosweetognathus monocornus etc.) are reassessed based on a rich conodont collection.},
author = {Sun, Yadong and Liu, X. T. and Yan, J. X. and Li, B. and Chen, B. and Bond, D. P G and Wignall, P. B. and Wang, X. and Lai, X. L. and Joachimski, Michael},
doi = {10.1016/j.palaeo.2016.10.013},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Biostratigraphy; Cisuralian; Conodont; Guadalupian; Kungurian; South China},
pages = {42-63},
peerreviewed = {Yes},
title = {{Permian} ({Artinskian} to {Wuchapingian}) conodont biostratigraphy in the {Tieqiao} section, {Laibin} area, {South} {China}},
volume = {465},
year = {2017}
}
@article{faucris.112413884,
author = {Buggisch, Werner and Wang, Xiang-Dong and Alekseev, Alexander S. and Joachimski, Michael},
doi = {10.1016/j.palaeo.2010.12.015},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LG.permoc},
pages = {18-38},
peerreviewed = {Yes},
title = {{Permo}-{Carboniferous} carbon isotope stratigraphy of sections from {China} ({Yangtze} platform), {USA} ({Kansas}) and {Russia} ({Moscow} {Basin} and {Urals}).},
volume = {301},
year = {2011}
}
@article{faucris.210137309,
author = {Sun, Yadong and Richoz, S. and Krystyn, L. and Zhang, Z. T. and Joachimski, Michael},
doi = {10.1144/jgs2017-170},
faupublication = {yes},
journal = {Journal of the Geological Society},
pages = {167-177},
peerreviewed = {Yes},
title = {{Perturbations} in the carbon cycle during the carnian humid episode: {Carbonate} carbon isotope records from southwestern {China} and {Northern} {Oman}},
volume = {176},
year = {2019}
}
@article{faucris.270736884,
abstract = {The ultimate cause(s) of the end-Permian mass extinction (∼252 Ma ago) has been disputed. A complex interplay of various effects, rather than a single, universal killing mechanism, were most likely involved. Climate warming as consequence of greenhouse gas emissions by contemporaneous Siberian Traps volcanism is widely accepted as an initial trigger. Synergetic effects of global warming include increasing stratification of the oceans, inefficient water column mixing, and eventually low marine primary productivity culminating in a series of consequences for higher trophic levels. To explore this scenario in the context of the end-Permian mass extinction, we investigated sedimentary total organic carbon, phosphorus speciation as well as nickel concentrations in two low-latitude Tethyan carbonate sections spanning the Permian-Triassic transition. Total organic carbon, reactive phosphorus and nickel concentrations all decrease in the latest Permian and are low during the Early Triassic, pointing to a decline in primary productivity within the Tethyan realm. We suggest that the productivity collapse started in the upper C. yini conodont Zone, approximately 30 ka prior to the main marine extinction interval. Reduced primary productivity would have resulted in food shortage and thus may serve as explanation for pre-mass extinction perturbations among marine heterotrophic organisms.
Unlike other mass extinctions of the Phanerozoic, the Late Ordovician mass extinction took place during an icehouse interval, accompanied by the glaciation of Gondwana. Ice sheets reached their maximum during the Hirnantian and global sea-level dropped substantially. Consequently, the shallow tropical shelf environments of Laurentia and Baltica became subaerially exposed or remaining submerged shelves were characterized by very shallow water-depths. Redox proxies suggest that most shallow shelf settings were well oxygenated to that time, while the global extent of anoxic environments increased, implying that deoxygenation was confined to the open ocean. We speculate that the burial rate of the nutrient phosphorus (P) on shelves was minimal during the Hirnantian glacial maximum (HGM) due to bypass of the shelves in respect to the incoming riverine dissolved load. Hence, a large excess of bioavailable P entering the open ocean would have stimulated phytoplankton production which lowered oxygen concentrations by aerobic respiration.
In order to test this hypothesis, we determined reactive P (Preact) contents in two low-latitude carbonate successions (Anticosti Island and Estonia) spanning the HGM. Moreover, we measured total organic carbon (C) concentrations and calculated C/P ratios to evaluate the burial efficiency of P. Samples from both sites are characterized by overall low Preact contents. We observe a decreasing trend in Preact towards the HGM, reaching a minimum during the initial transgression thereafter. C/P ratios suggest efficient P-burial throughout the study interval and, hence, Preact contents are assumed to be a direct measure of primary productivity, P-availability, and P-burial. Using the Preact concentrations, we modeled shelf P-burial fluxes with estimates for global shelf area and sedimentation rates. The model suggests that shelf P-burial fluxes around the HGM were approximately halved due to a reduced shelf area and minimum Preact contents. With the assumption of a constant P-input to the ocean, the proposed scenario serves as a plausible explanation for the observed redox gradient},
author = {Müller, Johann and Joachimski, Michael and Lehnert, Oliver and Männik, Peep and Sun, Yadong},
doi = {10.1016/j.palaeo.2023.111906},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Phosphorus cycle; Hirnantian; Glaciation; Primary productivity; Sea level; Anoxia},
peerreviewed = {Yes},
title = {{Phosphorus} cycling during the {Hirnantian} glaciation},
volume = {634},
year = {2024}
}
@article{faucris.311725060,
abstract = {Two Upper Devonian stratigraphic sections Pramosio A (PRA) and Freikofel T (FRKT) in the Carnic Alps of Italy and adjacent southern Austria representing continuous, entirely calcareous oxic sedimentation spanning the Frasnian-Famennian (Fr-Fm) boundary, were analysed for conodont biostratigraphy, facies and geochemistry. Lithologies are mainly packstone and wackestone interbedded with rudstones. Microbial matter is associated with packstones and wackestones in the latest Frasnian continuing through to the base of the Famennian. Intervals of black limestone and anoxic black shale with bituminous layers are absent from both sections. Microfacies analysis, focused mainly on the Fr-Fm boundary interval, discriminated nine facies in the PRA section and six in the FRKT section, all representing water depths of a few dozens of metres. The former is interpreted as having been deposited along the middle or upper part of a slightly inclined carbonate ramp (<2°), the latter along or at the base of a metastable carbonate ramp (<6°). Pramosio A section ranges from Frasnian Zone 12 to the Pseudopolygnathus granulosus Zone, Freikofel T from Zone 13a to the Palmatolepis termini Zone. The conodont study focused on biodiversity variation during the late Frasnian biologic crisis and across the Fr-Fm transition up to the end of recovery in the Palmatolepis minuta minuta Zone. Polygnathids dominate until the upper part of Zone 13b when palmatolepids become prevalent. In Zone 13c, their dominance continued into the lower Famennian. Increase of icriodids was paralleled by the onset of palmatolepid dominance. The end-Frasnian biological crisis impacted heavily on conodonts, extinguishing the ancyrodellids and wiping out all palmatolepids except for a single species, Palmatolepis ultima. The scenario cannot be attributed to anoxia because the seawaters were well oxygenated. The Lower and Upper Kellwasser extinction events (LKWE and UKWE), connected with the end-Frasnian biologic crisis were identifiable by conodonts even in the absence of sedimentary signatures of anoxic facies. The Lower Kellwasser Event is associated with a decreasing-temperature trend. Two phases of the Upper Kellwasser Event have been discriminated. Both are connected with decreasing temperature based on conodont apatite δ18O. Enhanced burial of organic matter is indicated by increase in δ13C measured on whole-rock carbonate in the Pramosio A section from the uppermost Zone 13b to the base of the Famennian. This positive shift in δ13Ccarb pre-dates the shift in δ18O. Conodont abundances are higher in Pramosio A than in Freikofel T. Exceptional abundances occur in Zone 13b in PRA section, peaking in pelagic environments with palmatolepid conodonts concurrent with increase of other pelagic biota, especially ammonoids and radiolarians. This is consistent with transgressive phases. Low abundances often coincide with rudstone levels equating with low-stand phases. Those in the early Famennian are inferred to reflect events during the worldwide biological crisis. Three transgressive-regressive cycles have been identified during Zone 13b in the Carnic Alps; the regressive trend of the last cycle persisted throughout Zone 13c when the basin reached low-stand conditions followed by a transgressive phase immediately above the Fr-Fm boundary. The transgressive-regressive cycles were of high frequency and possibly of fourth order because the time interval between the lower and upper Kellwasser positive δ13C excursions, equivalent to the interval uppermost Zone 12 to uppermost Zone 13c, has been estimated at about 600 kyr.},
author = {Farabegoli, Enzo and Perri, Maria Cristina and Spalletta, Claudia and Joachimski, Michael and Andrew, Anita and Pondrelli, Monica},
doi = {10.4435/BSPI.2023.06},
faupublication = {yes},
journal = {Bollettino Della Societa Paleontologica Italiana},
keywords = {biostratigraphy; conodonts; Depositional environments; extinction; Lower Kellwasser Event; post-event recovery; stable isotopes; Upper Kellwasser Event},
note = {CRIS-Team Scopus Importer:2023-10-06},
pages = {143-217},
peerreviewed = {Yes},
title = {{Physical} and biological events across the {Frasnian}-{Famennian} boundary ({Late} {Devonian}) in continuous oxic carbonate successions in the western {Tethys} ({Carnic} {Alps} of {Italy} and {Austria})},
volume = {62},
year = {2023}
}
@article{faucris.112420264,
abstract = {The Late Ordovician culminated in a major glacial period that has been related to one of the strongest mass extinctions recorded during the Phanerozoic. During this interval, Anticosti Island (Québec, eastern Canada) was located at low to intermediate palaeolatitudes (15-30° S) on the eastern margin of Laurentia. It displays a relatively complete section across the Ordovician-Silurian (O/S) boundary. Upper Ordovician to Lower Silurian strata of Anticosti studied here comprise the Vauréal (Katian), Ellis Bay (Hirnantian) and Becscie (latest Hirnantian-Rhuddanian) formations. Phytoplankton dynamics inferred from the acritarch content of these strata are locally compared with new geochemical environmental proxies (δ13C), with recent palynological data from Baltica and also with phytoplankton dynamics as described from near-polar, high latitude localities of the Gondwana region. Two positive excursions of the carbon isotope record have been identified in the lower and upper Ellis Bay Formation.Overall, phytoplankton trends are as follows: (1) as with chitinozoans, conodonts, brachiopods and corals, acritarchs from Anticosti display a major turn-over during the early Hirnantian (uppermost Vauréal Formation-lower Ellis Bay Formation), with the appearance of taxa that exhibit Silurian affinities (e.g., Tylotopalla sp., Ammonidium sp., Oppilatala sp., Evittia sp., Dilatisphaera spp.). High polymorphism for some common taxa is observed in the interval corresponding to the first δ13C positive excursion. Using sequence stratigraphy, this period may be related to a first glacially driven sea-level drawdown corresponding to terrestrial ice-sheet growth on Gondwana, such as recorded in Morocco. (2) Subsequently, during the late Hirnantian of Anticosti (uppermost Ellis Bay Formation), phytoplanktic communities suffered a crisis, exemplified by the disappearance of several typical, large Late Ordovician taxa (i.e., Orthosphaeridium spp., Peteinosphaeridium spp., large Baltisphaeridum spp., Sacculidium sp.). The lower Becscie strata, corresponding to the time of deglaciation at the O/S boundary interval, only contain a low diversity assemblage dominated by large acritarchs of the genus Hoegklintia and other morphologically related forms, and a few tolerant and long-ranging taxa (e.g., Evittia remota, Micrhystridium spp., leiospheres). Despite a possible taphonomic bias in the uppermost Ellis Bay Formation, the major crisis in the late Hirnantian coincides with the second δ13C excursion and a second, stronger glacially-driven sea-level fall corresponding to the time of the maximum extend of the ice sheets on Gondwana. (3) Such phytoplankton events have also been detected in Gondwanan ice-center area, but with "typical Ordovician taxa crises" occurring apparently later when plotted against positive carbon isotope excursions, as also observed in Baltica. This time-lag may be linked to a basin configuration of the studied areas, where environmental stress consequently differed or linked to the presence of omission surfaces coupled with preservation bias of acritarch assemblages in the uppermost Ordovician strata of Anticosti. In addition to their biostratigraphic and palaeobiogeographic utility, acritarchs turn out to be more specific in highlighting palaeoenvironmental conditions. © 2011 Elsevier B.},
author = {Delabroye, Aurelien and Munnecke, Axel and Vecoli, Marco and Copper, Paul and Tribovillard, Nicolas and Joachimski, Michael and Desrochers, Andre and Servais, Thomas and Munnecke, Axel},
doi = {10.1016/j.palaeo.2011.09.011},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Baltica; Carbon isotopes; Gondwana; Laurentia; Ordovician-Silurian boundary; Phytoplankton},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LG.phytop},
pages = {79-97},
peerreviewed = {Yes},
title = {{Phytoplankton} dynamics across the {Ordovician}/{Silurian} boundary at low palaeolatitudes: correlations with carbon isotopic and glacial events.},
url = {http://www.sciencedirect.com/science/article/pii/S0031018211004846},
volume = {312},
year = {2011}
}
@article{faucris.111481524,
author = {Joachimski, Michael and et al.},
author_hint = {Riquier L. - in: Over D.J. Morrow J.R. & Wignall P.B. (eds): Understanding Late Devonain and Permian-Triassic Biotic and climatic events: 20 , Tribovillard N., Averbuch O., Joachimski Michael, Racki G., Devleeschouwer X., Albani A.E., Riboulleau A.},
faupublication = {yes},
journal = {Developments in Palaeontology and Stratigraphy},
note = {UnivIS-Import:2015-03-09:Pub.2005.nat.dgeo.IGM.LG.produc},
pages = {199-224},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Productivitiy} and bottom water redox conditions on both sides of the {Eovariscan} {Belt}: constraints from trace element geochemistry.},
volume = {20},
year = {2005}
}
@inproceedings{faucris.106993744,
author = {Kastenmeier, Pia and Ballasone, Pina and Boni, Maria and Di Maio, Ernesto and Joachimski, Michael},
booktitle = {ASMOSIA X. Proceedings of the 10th International Conference},
faupublication = {yes},
note = {UnivIS-Import:2015-07-08:Pub.2014.nat.dgeo.IGM.LG.proven},
pages = {171-176},
title = {{Provenace}, distributiion and trade of the local building materials in the {Sarno} {River} {Plain} ({Campania}) from the 6th {Century} {BC} to {AD} 79.},
venue = {Rom},
year = {2014}
}
@article{faucris.116654164,
author = {Buggisch, Werner and Lehnert, Oliver and Joachimski, Michael and et al.},
author_hint = {Suttner T. J., Lehnert Oliver, Joachimski Michael, Buggisch Werner},
faupublication = {yes},
journal = {Acta Palaeontologica Sinica},
note = {UnivIS-Import:2015-03-09:Pub.2007.nat.dgeo.IGM.LG.recogn},
pages = {466-470},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Recognition} of the {Boda} event in the {Pin} {Formation} of northern {India} based on new {d13C} and conodont data.},
volume = {46},
year = {2007}
}
@article{faucris.111778964,
abstract = {Oxygen and carbon isotope analyses were carried out on Upper Bajocian - Bathonian calcitic belemnite rostra and oyster shells as well as aragonitic ammonite, nautiloid and trigoniid shells from the "Ore-bearing Cze{ogonek}stochowa Clay Formation" in south-central Poland. All samples were studied by means of cathodoluminscence microscopy, trace element, X-ray, and scanning electron microscope (SEM) analysis in order to select best-preserved material. SEM studies allowed classifying some aragonitic ammonite and nautiloid shells (> 99% aragonite) as diagenetically altered. Average δ18O values of oysters, belemnites and trigoniids translate into relatively low palaeotemperatures of 10.1, 9.2 and 7.4 °C, respectively. The comparable δ18O values of bivalves and belemnites indicate that belemnites had a nectobenthic lifestyle and did not record surface water temperatures. The ammonite fauna is interpreted to have been nektonic, however, palaeotemperatures derived from ammonite δ18O (around 18.6 °C) may be overestimated due to a lower, than normal marine, salinity of surface waters. The reduced salinity is inferred as well from sedimentological observations and faunal composition. The obtained δ18O values indicate cool climatic conditions during the Late Bajocian-Bathonian in south-central Poland, which may have been linked with the occurrence of a cold climatic episode. Despite the fact that all studied shells were not precipitated in carbon isotope equilibrium with ambient waters, the δ13C shell values enabled us to roughly estimate isotope composition of dissolved inorganic carbon (DIC) in the Late Bajocian-Bathonian sea of south-central Poland. Water δ13CDIC values calculated from ammonite δ13C are lower in comparison to δ13CDIC values calculated from oyster and belemnite carbon isotope ratios, which in conjunction with ammonite δ18O values indicates lower salinity of surface or shallow near-coastal waters. © 2007 Elsevier B.V. All rights reserved.},
author = {Joachimski, Michael and Wierzbowski, Hubert},
doi = {10.1016/j.palaeo.2007.07.010},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Ammonites; Bajocian; Bathonian; Belemnites; Bivalves; Oxygen and carbon isotopes},
note = {UnivIS-Import:2015-03-09:Pub.2007.nat.dgeo.IGM.LG.recons},
pages = {523-540},
peerreviewed = {Yes},
title = {{Reconstruction} of {Late} {Bajocian} - {Bathonian} marine palaeoenvironments using carbon and oxygen isotope ratios of calcareous fossils from the {Polish} {Jura} {Chain} (central {Poland}).},
volume = {254},
year = {2007}
}
@article{faucris.106247504,
author = {Puceat, E. and Joachimski, Michael and Bouilloux, A. and Monna, Fabrice and Bonin, A. and Motreuil, S. and Moriniere, P. and Henard, S. and Mourin, J. and Dera, G. and Quesne, D.},
doi = {10.1016/j.epsl.2013.07.036},
faupublication = {yes},
journal = {Earth and Planetary Science Letters},
pages = {380-382},
peerreviewed = {Yes},
title = {{Reply} on {Comment} by {Longinelli} (2013) on a revised phosphate-water fractionation equation},
year = {2013}
}
@article{faucris.113141424,
author = {Sun, Yadong and Joachimski, Michael and Wignall, Paul B. and Yan, Chunbo and Chen, Yanlong and Jiang, Haishui and Wang, Lina and Lai, Xulong and Sun, Yadong},
doi = {10.1126/science.1233090},
faupublication = {yes},
journal = {Science},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LG.respon},
pages = {1033},
peerreviewed = {Yes},
title = {{Response} to comment on "{Lethally} hot temperatures during the {Early} {Triassic}.},
volume = {339},
year = {2013}
}
@article{faucris.121604604,
author = {Puceat, E. and Joachimski, Michael and Bouilloux, A. and Monna, Fabrice and Bonin, A. and Motreuil, S. and Moriniere, P. and Henard, S. and Mourin, J. and Dera, Guillaume and Quesne, D.},
doi = {10.1016/j.epsl.2010.07.034},
faupublication = {yes},
journal = {Earth and Planetary Science Letters},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LG.revise},
pages = {135-142},
peerreviewed = {Yes},
title = {{Revised} phosphate-water fractionation equation reassessing paleotemperaturesderived from biogenic apatite.},
volume = {298},
year = {2010}
}
@article{faucris.250759181,
abstract = {Focusing on the Shuixiakou Section (Xikou area, Zhen’an County, Shaanxi Province, southeastern Qinling region, China), the Roadian-Wordian conodonts are investigated. More than 2 000 conodont elements including 6 genera and 14 species have been obtained. Based on these materials, the Guadalupian Jinogondolella nankingensis and J. aserrata zones have been recognized. The Roadian-Wordian boundary is tentatively defined by the first occurrence of J. aserrata in the lower part of Unit III in the Shuixiakou Formation. The sedimentary succession of Xikou area records similar sea-level changes to those observed in Laibin area (South China). The 40 m-thick bioclastic limestone of Unit IV in this section can be correlated with the reefs of Bed 114 in Laibin area. A temperature drop indicated by δ18Oapatite values suggests this Wordian interval coincides with a period of glaciation and global regression.
18O values for conodonts from the Oakley (middle Desmoinesian/upper Moscovian), Hushpuckney (lower Missourian, lower Kasimovian) and Heebner black shales (lower Virgilian/lower Gzehlian) are 18.8±0.3‰, 19.1±0.2‰, and 18.9±0.1‰, respectively. Oxygen isotope ratios of conodonts from the Nuyaka Creek black shale (uppermost Desmoinesian/upper Moscovian) of the Midcontinent Basin are 19.8±0.3‰, and thus significantly higher in comparison to the other black shales. These higher values support previous interpretations that the Lost Branch is a minor cyclothem, with south polar regions having been less deglaciated than during the interglacial phases of the more widespread major cyclothems. Conodonts from Oakley shale equivalents from Ohio and Pennsylvania are depleted in 18O on average by 2.5‰ in comparison to conodonts from the Midcontinent Basin. This pattern is also evident for conodonts from the Heebner and Hushpuckney shales, although conodonts from the Appalachian Basin show only a 0.4-0.7‰ depletion in 18O compared to conodonts from the Midcontinent Basin. The differences in δ18O are interpreted as reflecting primarily salinity, assuming that temperature was relatively constant across the palaeotropical Midcontinent Sea.Lower salinities in the Appalachian Basin and a significant salinity gradient in the Midcontinent Sea were reconstructed for the Desmoinesian Oakley shale, supporting the idea that freshwater discharge resulted in a salinity-stratified water column during times of "everwet" tropical palaeoclimate, at least in the eastern part of the epeiric sea. However, the salinity gradient is considerably reduced during the subsequent Missourian and Virgilian periodically dry interglacial periods (Hushpuckney and Heebner shales). This suggests that surface waters in the Midcontinent Sea were not significantly influenced by continental runoff and calls into question whether a halocline was necessary for the formation of phosphatic core shales.},
author = {Joachimski, Michael and Lambert, Lance and Joachimski, Michael},
doi = {10.1016/j.palaeo.2015.05.014},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Conodont; Oxygen isotopes; Pennsylvanian; Salinity; US Midcontinent},
pages = {71-80},
peerreviewed = {Yes},
title = {{Salinity} contrast in the {US} {Midcontinent} {Sea} during {Pennsylvanian} glacio-eustatic highstands: {Evidence} from conodont apatite δ
18{O}},
volume = {433},
year = {2015}
}
@article{faucris.319871333,
abstract = {
We present sequential oxygen isotope records (δ18Ophosphate vs. VSMOW) of horse tooth enamel phosphate of six individuals from two adjacent Palaeolithic sites in Lower Austria. Three molars from the site Krems-Wachtberg date to 33–31k cal a bp, and three molars from Kammern-Grubgraben to 24–20k cal a bp. All teeth show seasonal isotope variations, which are used to reconstruct the annual oxygen isotope composition of drinking water (δ18Odw) and palaeotemperatures. Measured δ18Ophosphate values ranged from 8.6 to 13.0‰ and from 10.8 to 13.9‰ at Krems-Wachtberg and Kammern-Grubgraben, respectively. An inverse modelling approach was used to reconstruct summer and winter temperatures after a correction for glacial oceanic source water δ18O. Reconstructed annual δ18Odw was −16.4 ± 1.5‰ at Krems-Wachtberg and −15.3 ± 1.4‰ at Kammern-Grubgraben, resulting in annual temperatures of −5.7 ± 3.1 and −3.5 ± 2.9°C, respectively. Summer and winter temperatures reconstructed from individual teeth exhibit high seasonal variations with moderate summer temperatures and extremely low winter temperatures typical for a polar tundra climate. Isotopic differences between individuals are attributed to interannual climate variability or to different drinking water sources. Our reconstructed temperatures are, overall, consistent with previously reported values from European horse teeth, when taking regional differences into account.
13C and δ18O sclerochronology (n = 270). With more than 1000 described invertebrate species, the Cassian Formation has one of the best records of an Early Mesozoic tropical fauna. In addition, the Cassian Formation is one of the very few Triassic occurrences with original aragonite preservation, with all studied shells consisting of pristine aragonite. The presence of aragonite and crossed lamellar as well as fibrous prismatic shell microstructures shown for the first time for Triassic megalodontoids suggests absence or minimal impact of diagenetic alteration. The δ13C values range from 3.6 to 5.8‰ and show a distinct cyclicity in two studied shells whereas a third shell shows no obvious cyclicity. In one bivalve specimen, the cycles are somewhat offset from δ18O cycles and in the other specimen δ18O and δ13C curves are inversely correlated. Seasonal variation in freshwater runoff including nutrient input and subsequent changes in plankton productivity during dry and wet seasons may explain δ13C cyclicity. δ18O values show a pronounced cyclicity within each of the studied shells varying from - 3.6 to - 1.4‰. The variations in δ18O suggest a pronounced seasonality in Late Triassic tropical shallow waters of the western Tethys, with inferred seasonal temperature changes ranging from 24 to 32 °C. Influx of fresh water during the rainy seasons (mega-monsoon) or upwelling might also explain part of the variation in δ18O. The presented data suggest that the diverse Cassian fauna lived under conditions characterized by warm sea-surface waters with a pronounced seasonality. Similar conditions are reported for some modern tropical settings. © 2009 Elsevier B.V. All rights reserved.},
author = {Nuetzel, A. and Joachimski, Michael and López Correa, Matthias},
doi = {10.1016/j.palaeo.2009.11.011},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Bivalves; Climate; Late Triassic; Sclerochronology; Seasonality},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LG.season},
pages = {194-204},
peerreviewed = {Yes},
title = {{Seasonal} climatic fluctuations in the {Late} {Triassic} tropics - high-resolution oxygen isotope records from aragonitic bivalve shells ({Cassian} {Formation}, {Northern} {Italy})},
volume = {285},
year = {2010}
}
@article{faucris.241254701,
abstract = {Metacarbonate assemblages in high-grade metamorphic terranes often pose challenges when trying to distinguish between mantle-derived carbonatite and sedimentary carbonate protoliths. We present a study of granulite-facies metacarbonate samples of the putative Munnar carbonatite described as decimeter-thick dikes and veins, and layers of a meter-thick metacarbonate and calc-silicate assemblage, respectively. Thin sections of the metacarbonate dike samples show absence of pyrochlore and ubiquitous scapolite, titanite, wollastonite, and detrital zircons are compatible with impure limestone protoliths. Nd and Sr isotope compositions indicate protoliths with Paleoproterozoic crustal residence times which contrast the mantle sources of Indian and global carbonatites. Trace-element patterns display the characteristics of upper crust, and Ce- and Y-anomalies in a number of samples suggest protolith formation under marine conditions. Carbon and oxygen isotope compositions of the metacarbonate samples interlayered with calc-silicate rocks are similar to those in marine limestone. The metacarbonate dikes, however, show mantle-like compositions which are interpreted as reflecting equilibration with mantle-derived CO2 during granulite-facies metamorphism. The dikes yielded a U-Pb zircon crystallization age of 1020 ± 70 Ma and a cross-cutting quartz syenite, thought to be cogenetic, a magmatic age of 620 ± 35 Ma; the hosting gneiss provided a magmatic age of 2452 ± 14 Ma. We conclude that the layered metacarbonate and calc-silicate rocks represent a former marine limestone and marl sequence and the metacarbonate dikes and veins small-volume melts of crust-derived carbonate-rich sediment.},
author = {Hegner, Ernst and Rajesh, Selvaraj and Willbold, Matthias and Müller, Dirk and Joachimski, Michael and Hofmann, Mandy and Linnemann, Ulf and Zieger, Johannes and Pradeepkumar, Anakkathil Purushothaman},
doi = {10.1016/j.jseaes.2020.104432},
faupublication = {yes},
journal = {Journal of Asian Earth Sciences},
keywords = {Carbonatite; Geochemistry; Marble; Metacarbonate; Nd-Sr-C-O isotopes; Zircon geochronology},
note = {CRIS-Team Scopus Importer:2020-08-07},
peerreviewed = {Yes},
title = {{Sediment}-derived origin of the putative {Munnar} carbonatite, {South} {India}},
volume = {200},
year = {2020}
}
@article{faucris.111833524,
abstract = {Globally, the Series 2 – Series 3 boundary of the Cambrian System coincides with a major carbon isotope excursion, sea-level changes and trilobite extinctions. Here we examine the sedimentology, sequence stratigraphy and carbon isotope record of this interval in the Cambrian strata (Durness Group) of NW Scotland. Carbonate carbon isotope data from the lower part of the Durness Group (Ghrudaidh Formation) show that the shallow-marine, Laurentian margin carbonates record two linked sea-level and carbon isotopic events. Whilst the carbon isotope excursions are not as pronounced as those expressed elsewhere, correlation with global records (Sauk I – Sauk II boundary and Olenellus biostratigraphic constraint) identifies them as representing the local expression of the ROECE and DICE. The upper part of the ROECE is recorded in the basal Ghrudaidh Formation whilst the DICE is seen around 30m above the base of this unit. Both carbon isotope excursions co-occur with surfaces interpreted to record regressive–transgressive events that produced amalgamated sequence boundaries and ravinement/flooding surfaces overlain by conglomerates of reworked intraclasts. The ROECE has been linked with redlichiid and olenellid trilobite extinctions, but in NW Scotland, Olenellus is found after the negative peak of the carbon isotope excursion but before sequence boundary formatio},
author = {Faggetter, Luke E. and Wignall, Paul B. and Pruss, Sara B. and Sun, Yadong and RAINE, ROBERT J. and Newton, Robert J. and Widdowson, Mike and SMITH, PAUL M. and Sun, Yadong and Joachimski, Michael},
doi = {10.1017/S0016756816000947},
faupublication = {yes},
journal = {Geological Magazine},
keywords = {DICE; Durness Group; ROECE; Scotland; trilobite extinction},
pages = {865-877},
peerreviewed = {unknown},
title = {{Sequence} stratigraphy, chemostratigraphy and facies analysis of {Cambrian} {Series} 2 – {Series} 3 boundary strata in northwestern {Scotland}},
volume = {155},
year = {2018}
}
@article{faucris.232036010,
abstract = {Permian-Triassic boundary sections from Armenia were studied for carbon isotopes of carbonates as well as oxygen isotopes of conodont apatite in order to constrain the global significance of earlier reported variations in the isotope proxies and elaborate the temporal relationship between carbon cycle changes, global warming and Siberian Trap volcanism. Carbon isotope records of the Chanakhchi and Vedi II sections show a 3-5 parts per thousand negative excursion that start in the Clarkina nodosa (C. yini) conodont Zone (latest Permian) with minimum values recorded in Hindeodus parvus to Isarcicella isarcica conodont zones (earliest Triassic). Sea surface temperatures (SST) reconstructed from oxygen isotopes of conodont apatite increase by 8-10 degrees C over an extrapolated time interval of similar to 39 ka with the onset of global warming occurring in the C. iranica (C. meishanensis) Zone of the latest Permian. Climate warming documented in the Armenian sections is comparable to published time-equivalent shifts in SST in Iran and South China suggesting that this temperature change represents a true global signature. By correlating the Armenian and Iranian section with the radiometrically well-dated Meishan GSSP (Global Stratotype Section and Point) section (South China), the negative shift in delta C-13 is estimated to have occurred 12-128 ka prior to the onset of global warming. This temporal offset is unexpected given the synchrony in changes in atmospheric CO2 and global temperature as seen in Pleistocene ice core records. The negative delta C-13 excursion is explained by the addition of emission of isotopically light CO2 and CH4 from thermogenic heating of organic carbon-rich sediments by Siberian Trap sill intrusions. However, the observed time lag in the delta C-13 and delta O-18 shifts questions the generally assumed cause-effect relationship between emission of thermogenically produced greenhouse gases and global warming. The onset of temperature rise coincides with a significant enrichment in Hg/TOC (total organic carbon) ratios arguing for a major volcanic event at the base of the extinction interval. Whether global warming was a major factor for the Late Permian mass extinction depends on the duration of the extinction interval. Warming only starts at the base of the extinction interval, but with the extinction encompassing a time interval of 60 +/- 48 ka, global climate warming in conjunction with temperature-related stressors as hypoxia and reduced nutrient availability may have been one of the major triggers of the most devastating biotic crisis in Earth history.},
author = {Joachimski, Michael and Alekseev, A. S. and Grigoryan, A. and Gatovsky, Yu A.},
doi = {10.1130/B35108.1},
faupublication = {yes},
journal = {Geological Society of America Bulletin},
month = {Jan},
note = {CRIS-Team WoS Importer:2020-01-21},
pages = {427-443},
peerreviewed = {Yes},
title = {{Siberian} {Trap} volcanism, global warming and the {Permian}-{Triassic} mass extinction: {New} insights from {Armenian} {Permian}-{Triassic} sections},
volume = {132},
year = {2020}
}
@article{faucris.262885431,
abstract = {
Horacek et al. (2021) commented on our publication arguing that we used an incorrect biochronology to define the Permian-Triassic (PT) boundary and that this inaccurate definition resulted in an erroneous interpretation of the oxygen isotope record in the studied Chanakhchi (former Sovestashen) section. Their comment gives us the opportunity to discuss in depth the identification of the PT boundary and to address some of the flawed arguments of Horacek et al.
},
author = {Joachimski, Michael and Alekseev, Alexander S. and Grigoryan, Artyom and Gatovsky, Yu A.},
doi = {10.1130/B36214.1},
faupublication = {yes},
journal = {Geological Society of America Bulletin},
peerreviewed = {Yes},
title = {{Siberian} {Trap} volcanism, global warming and the {Permian} {Triassic} mass extinction: {New} insights from {Armenian} {Permian}-{Triassic} sections: {Reply}},
year = {2022}
}
@article{faucris.245713085,
abstract = {Conodont ecology of the Early Triassic Smithian–Spathian transition is still poorly understood. Here we use oxygen isotope ratios of monogeneric conodonts from Omani samples to reveal the differences of oxygen isotopic composition between different taxa. Oxygen isotope analyses from Oman reveal that Neogondolella inhabited a deeper part of the water column relative to neospathodids and Icriospathodus. This indicates that species of Neogondolella lived in an environment ca. 1.7 °C cooler than where neospathodids lived. The investigation of conodonts from these Smithian and Spathian sections has also enabled the first recovery of some rarely reported species (e.g., Icriospathodus zaksi, Paullella omanensis sp. nov. Chen and Gladigondolella laii sp. nov. Chen) from Oman. Paullella omanensis sp. nov. was further recovered from Plavno, Croatia, indicating a large geographic distribution, and its value for biostratigraphic correlations. The discovery of these species in both Oman and Croatia expands their geographical distribution.
18OPvalues and87Sr/86Sr ratios were determined on disarticulated xenacanthiform, hybodontid and ctenacanthid shark tooth material from several Early Permian (Sakmarian–Kungurian) continental bone beds of northern Texas and southern Oklahoma as well as from the marine Middle Permian (Roadian) of northern Arizona. The δ18OPvalues derived from the teeth of bone beds are in the range of 17.6–23.5‰ VSMOW, and are mostly depleted in18O by 0.5–5‰ relative to proposed coeval marine δ18OPvalues. This indicates an adaptation to freshwater habitats on the Early Permian coastal plain by several sharks. Distinctly higher δ18OPvalues from two bone beds are attributed to significant evaporative enrichment in18O in flood plain ponds.87Sr/86Sr ratios of around 0.71077 are notably more radiogenic than87Sr/86Sr of contemporaneous seawater. In contrast, the isotopic composition of teeth from the marine Kaibab Formation is characterised by low δ18OPvalues in the range of 13.4–15.6‰ VSMOW while87Sr/86Sr ratios of around 0.70821 are closer to the Roadian seawater value. The distinctly depleted δ18OPvalues cannot be readily explained by fluvially affected freshening in a nearshore marine environment, so a diagenetic alteration of the Kaibab material seems to be more likely, excluding it from further interpretation.},
author = {Fischer, Jan and Schneider, Joerg W. and Hodnett, John-Paul M. and Elliott, David K. and Johnson, Gary D. and Voigt, Silke and Joachimski, Michael and Tichomirowa, Marion and Goetze, Jens},
doi = {10.1080/08912963.2013.838953},
faupublication = {yes},
journal = {Historical Biology},
keywords = {bioapatite; bone beds; Early–Middle Permian; freshwater shark; Kaibab Formation; oxygen isotopes; strontium isotopes},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LG.stable},
pages = {710-727},
peerreviewed = {Yes},
title = {{Stable} and radiogenic isotope analyses on shark teeth from the {Early} to {Middle} {Permian} ({Sakmarian}{Roadian}) of the southwestern {USA}},
volume = {26},
year = {2014}
}
@article{faucris.111758064,
abstract = {Trace element contents and stable isotopic composition of Middle Campanian marl-limestone rhythmites and belemnite rostra of Belemnitella mucronata were investigated. High strontium and low iron as well as manganese and magnesium contents of belemnite calcite and bulk rock samples suggest no diagenetic overprint. However, the orange-coloured cathodoluminescence of coccolith-rich sediments indicates diagenetic cementation and/or recrystallization. The non-luminescent belemnite rostra reveal an extraordinary preservation of the microstructures that is interpreted to have been favoured by a silification of the outer rim of the belemnite rostra. Carbon isotope ratios of the coccolith limestones and belemnite rostra are comparable, with higher δC variations observed for belemnite calcite. The 1.5-2‰ depletion in δO of the marl-limestone rhythmites relative to belemnite calcite is explained by diagenetic alteration of the sediments. Palaeotemperatures, calculated from the δO values of the well-preserved belemnite rostra, are around 12.5 ± 2 °C and suggest rather low sea-surface temperatures for the Middle Campanian epicontinental sea of north Germany assuming a water depth of less than 100 m. © 2002 Éditions scientifiques et médicales Elsevier SAS. All rights reserved.},
author = {NIebuhr, Sara and Joachimski, Michael},
doi = {10.1016/S0016-6995(02)00009-8},
faupublication = {no},
journal = {Geobios},
keywords = {Belemnites; Carbon and oxygen isotopes; Carbonate diagenesis; North Germany; Palaeotemperatures; Upper Cretaceous},
pages = {51-64},
peerreviewed = {Yes},
title = {{Stable} isotope and trace element geochemistry of {Upper} {Cretaceous} carbonates and belemnite rostra ({Middle} {Campanian}, north {Germany})},
volume = {35},
year = {2002}
}
@article{faucris.110988724,
author = {Joachimski, Michael and et al.},
author_hint = {Niebuhr Birgit, Joachimski Michael},
faupublication = {yes},
journal = {Geobios},
note = {UnivIS-Import:2015-03-09:Pub.2002.nat.dgeo.IGM.LG.stable},
pages = {51-64},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Stable} isotope and trace element geochemistry of {Upper} {Cretaceous} coccolith limestones and belemnite rostra ({Middle} {Campanian}, {North} {Germany})},
volume = {35},
year = {2002}
}
@article{faucris.112000284,
abstract = {Stables isotopes and elemental composition of two well-preserved belemnite rostra (Hibolithes beyrichi and H. hastatus) from the Bathonian of central Poland were studied. Average temperatures calculated from the oxygen isotope ratios of Hibolithes beyrichi and H. hastatus are 10°C and 6°C, respectively. The absence of highamplitude variations in high-resolution temperature profiles suggests these belemnites lived in deeper waters. This interpretation is compatible with a nektobenthic habitat of belemnopsid belemnites. Carbon isotope ratios of the rostra are assumed to be affected by vital fractionation with prominent fluctuations in the δ 13C records resulting from changes in the metabolic activity. Observed variations in Mg:Ca ratios of the rostra (from 5 mmol-mol -1 to 28 mmol-mol -1) are predominantly a primary signal. Temperature dependence of the Mg:Ca ratio is inferred for H. beyrichi on the basis of a correlation with δ 180 values; however, no such correlation is observed for H. hastatus. No significant correlation is observed between Sr:Ca ratios and δ I80 values in either taxon. Sulphur contents in the rostra vary from 630 ppm to 4400 ppm and are interpreted to be largely coprecipitated with belemnite calcite. Extreme compositions of sulphur are interpreted to result from the incorporation of diagenetic sulphur during early marine diagenesis, which is also characterized in these rostra by high Mg:Ca and Sr:Ca ratios and low δ 13C values. A total number of growth rings in the rostrum of H. beyrichi is calculated at around 600, thus, an expected life span of H. beyrichi is considered to be ∼1.5 years assuming daily precipitation of growth bands. © 2009, SEPM.},
author = {Wierzbowski, Hubert and Joachimski, Michael},
doi = {10.2110/palo.2008.p08-101r},
faupublication = {yes},
journal = {Palaios},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LG.stable},
pages = {377-386},
peerreviewed = {Yes},
title = {{Stable} isotopes, elemental distribution and growth rings of belemnopsid belemnite rostra: proxies for belemnite life habitat.},
volume = {24},
year = {2009}
}
@article{faucris.122178804,
abstract = {This study investigates stable isotope signatures of five species of Silurian and Devonian deep-water, ahermatypic rugose corals, providing new insights into isotopic fractionation effects exhibited by Palaeozoic rugosans, and possible role of diagenetic processes in modifying their original isotopic signals. To minimize the influence of intraskeletal cements on the observed signatures, the analysed specimens included unusual species either devoid of large intraskeletal open spaces ('button corals': Microcyclus, Palaeocyclus), or typified by particularly thick corallite walls (Calceola). The corals were collected at four localities in the Holy Cross Mountains (Poland), Mader Basin (Morocco) and on Gotland (Sweden), representing distinct diagenetic histories and different styles of diagenetic alteration. To evaluate the resistance of the corallites to diagenesis, we applied various microscopic and trace element preservation tests. Distinct differences between isotopic compositions of the least-altered and most-altered skeleton portions emphasise a critical role of material selection for geochemical studies of Palaeozoic corals. The least-altered parts of the specimens show marine or near-marine stable isotope signals and lack positive correlation between δ13C and δ18O. In terms of isotopic fractionation mechanisms, Palaeozoic rugosans must have differed considerably from modern deep-water scleractinians, typified by significant depletion in both 18O and 13C, and pronounced δ13C-δ18O co-variance. The fractionation effects exhibited by rugosans seem similar rather to the minor isotopic effects typical of modern non-scleractinian corals (octocorals and hydrocorals). The results of the present study add to growing evidence for significant differences between Scleractinia and Rugosa, and agree with recent studies indicating that calcification mechanisms developed independently in these two groups of cnidarians. Consequently, particular caution is needed in using scleractinians as analogues in isotopic studies of extinct coral lineages. Answering some of the pertinent palaeoecological questions, such as that of the possibility of photosymbiosis in Palaeozoic corals, may not be possible based on stable isotope data.},
author = {Jakubowicz, Michal and Berkowski, Blazej and López Correa, Matthias and Jarochowska, Emilia and Joachimski, Michael and Belka, Zdzislaw},
doi = {10.1371/journal.pone.0136289},
faupublication = {yes},
journal = {PLoS ONE},
note = {UnivIS-Import:2015-10-26:Pub.2015.nat.dgeo.IGM.LP.stable},
pages = {e0136289 (29p.)},
peerreviewed = {Yes},
title = {{Stable} isotope signatures of {Middle} {Paleozoic} ahermatypic rugose corals - deciphering vital effects, alteration patterns, and palaeoecological implications},
volume = {10},
year = {2015}
}
@article{faucris.112001384,
abstract = {Million year-scale (3rd-order) depositional sequences (few 10s to ~ 100 m-thick) are common in the Devonian marine record and are correlated between sedimentary basins and across widely separated continents implying a eustatic origin. Tectonically driven changes in mid-ocean ridge spreading rates/lengths are too slow to account for the calculated 3rd-order rise/fall rates and typical orbital frequencies (~ 20-400 ky) are too fast. We analyzed oxygen isotopes from conodont apatite to evaluate if Early-Middle Devonian 3rd-order sea-level changes were controlled by paleoclimatically driven ice volume (glacio-eustasy) and seawater temperature change (thermo-eustasy). Two successive depositional sequences in the western U.S. (Nevada) and Czech Republic (Prague Basin) were sampled. The δ18O values range from 17.8‰ to 20.2‰ (SMOW) and show similar trends across the Emsian-Eifelian boundary with increasing and peak values in the lower costatus, decreasing values in the mid costatus, and increasing values in the upper costatus to australis zones. The similarities between these widely separated localities indicate that the isotopic trends are global rather than controlled by local variations in seawater temperature, evaporation/freshwater influx, or diagenesis. In the Nevada section, where the sea-level history is the most complete and best understood, the isotopic values increase and peak in late highstand and lowstand system tracts and decrease to the lowest values in the transgressive and maximum flooding intervals suggesting the My-scale sea-level changes were paleoclimatically controlled. The magnitude of isotopic shift from lowstand to maximum flooding intervals ranges from 0.8‰ to 1.5‰ and occurred over time spans of < 1.7 My. The only known mechanism to explain such large and rapid isotopic shifts is glacio-eustasy. If a reasonable range of My-scale subtropical sea surface temperature changes are assumed (~ 1-3 °C), then this requires glacio-eustatic sea-level changes of > 35 m to explain the remaining isotopic shifts. These amplitudes imply that significant continental ice sheets grew and melted on the < 1.7 My time scales during the Early-Middle Devonian and, like recent reports for the mid-Cretaceous and early Eocene, challenge previous assumptions of ice-free greenhouse climates. A plausible climate driver for these My-scale paleoclimate changes is long-period eccentricity (~ 2.4 My) and obliquity (~ 1.2 My) variations. © 2009 Elsevier B.V. All rights reserved.},
author = {Elrick, Maya and Berkyova, Stana and Klapper, Gilbert and Sharp, Zachary and Joachimski, Michael and Fryda, Jiri},
doi = {10.1016/j.palaeo.2009.03.008},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {Conodont apatite; Devonian; Glaciation; Glacio-eustasy; Greenhouse; Oxygen isotopes},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LG.strati},
pages = {170-181},
peerreviewed = {Yes},
title = {{Stratigraphic} and oxygen isotope evidence for {My}-scale glaciation driving eustasy in the {Early}-{Middle} {Devonian} greenhouse world.},
volume = {276},
year = {2009}
}
@article{faucris.112004024,
abstract = {A shark-tooth apatite δ18O record of the early Palaeogene North Sea reflects changes in regional hydrography by showing variable temperatures and salinities. A 2-4 Ma period in the early Eocene was particularly influenced by substantial surface-water freshening, indicated by a 3-4‰ reduction of δ18O values. The magnitude of the δ18O decrease indicates a depletion in 18O of surface waters by 2-3‰ relative to Eocene mean ocean water. This value is lower than that of coeval lakes reconstructed from freshwater gastropod δ18O values from the Paris Basin, suggesting that large rivers with high-latitude catchment areas drained into the North Sea. The period of surface-water freshening began close to the Palaeocene - Eocene thermal maximum, when relative sea-level fall, tectonic uplift and basaltic volcanism caused a temporary isolation of the North Sea. North Atlantic and North Sea surface waters became reconnected during a series of early Eocene transgressions. © 2009 Geological Society of London.},
author = {Zacke, Anne and Voigt, Silke and Joachimski, Michael and Gale, Andrew S. and Ward, David J. and Tuetken, Thomas},
doi = {10.1144/0016-76492008-068},
faupublication = {yes},
journal = {Journal of the Geological Society},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LG.surfac},
pages = {969-980},
peerreviewed = {Yes},
title = {{Surface} water freshening and high-latitude river discharge in the {Eocene} {North} {Sea}.},
volume = {166},
year = {2009}
}
@article{faucris.112205984,
abstract = {
The resolution and fidelity of global chronostratigraphic correlation are direct functions of the time period under consideration. By virtue of deep-ocean cores and astrochronology, the Cenozoic and Mesozoic time scales carry error bars of a few thousand years (k.y.) to a few hundred k.y. In contrast, most of the Paleozoic time scale carries error bars of plus or minus a few million years (m.y.), and chronostratigraphic control better than ±1 m.y. is considered “high resolution.” The general lack of Paleozoic abyssal sediments and paucity of orbitally tuned Paleozoic data series combined with the relative incompleteness of the Paleozoic stratigraphic record have proven historically to be such an obstacle to intercontinental chronostratigraphic correlation that resolving the Paleozoic time scale to the level achieved during the Mesozoic and Cenozoic was viewed as impractical, impossible, or both.
Here, we utilize integrated graptolite, conodont, and carbonate carbon isotope (δ13Ccarb) data from three paleocontinents (Baltica, Avalonia, and Laurentia) to demonstrate chronostratigraphic control for upper Llandovery through middle Wenlock (Telychian–Sheinwoodian, ∼436–426 Ma) strata with a resolution of a few hundred k.y. The interval surrounding the base of the Wenlock Series can now be correlated globally with precision approaching 100 k.y., but some intervals (e.g., uppermost Telychian and upper Sheinwoodian) are either yet to be studied in sufficient detail or do not show sufficient biologic speciation and/or extinction or carbon isotopic features to delineate such small time slices. Although producing such resolution during the Paleozoic presents an array of challenges unique to the era, we have begun to demonstrate that erecting a Paleozoic time scale comparable to that of younger eras is achievable.
},
author = {Cramer, Bradley D. and Loydell, David K. and Samtleben, Christian and Munnecke, Axel and Kaljo, Dimitri and Maennik, Peep and Martma, Tonu and Jeppsson, Lennart and Kleffner, Mark A. and Barrick, James E. and Johnson, Craig A. and Emsbo, Poul and Joachimski, Michael and Bickert, Torsten and Saltzman, Matthew R.},
doi = {10.1130/B26602.1},
faupublication = {yes},
journal = {Geological Society of America Bulletin},
keywords = {chronostratigraphy; Paleozoic; chronostratigraphic correlation; conodont; graptolite; carbon isotope; dC13; stratigraphy; chemostratigraphy; Llandovery; Wenlock; boundary; time scale},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LG.testin},
pages = {1700-1716},
peerreviewed = {Yes},
title = {{Testing} the limits of {Paleozoic} chronostratigraphic correlation via high-resolution (<500 kyr) integrated conodont, graptolite, and carbon isotope ({d13C}-carb) biochemostratigraphy across the {Llandovery}-{Wenlock} ({Silurian}) boundary: {Is} a unified {Phanerozoic} timescale achievable?},
url = {https://pubs.geoscienceworld.org/gsabulletin/article-abstract/122/9-10/1700/125638/testing-the-limits-of-paleozoic?redirectedFrom=fulltext},
volume = {122},
year = {2010}
}
@article{faucris.123012824,
author = {Arfè, Guiseppe and Boni, Maria and Mondillo, Nicola and Ballasone, Pina and Joachimski, Michael and Mormone, Angela},
doi = {10.1080/03717453.2017.1306228},
faupublication = {yes},
journal = {Transactions of the Institutions of Mining and Metallurgy, Section B: Applied Earth Science},
peerreviewed = {Yes},
title = {{The} {Bongará}-{Mina} {Grande} ({Amazonas}, {Peru}) {Zn}-nonsulphide deposit},
year = {2017}
}
@article{faucris.120111024,
author = {Mondillo, Nicola and Arfè, Giuseppe and Boni, Maria and Ballasone, Pina and Boyce, A and Joachimski, Michael and Kang, J.S. and Villa, I.M.},
doi = {10.1016/j.oregeorev.2018.01.021},
faupublication = {yes},
journal = {Ore Geology Reviews},
pages = {261-276},
peerreviewed = {Yes},
title = {{The} {Cristal} {Zinc} prospect ({Amazonas} region, northern {Peru}). {Part} {I}: {New} insights on the sulfide mineralization in the {Bongará} province},
volume = {94},
year = {2018}
}
@article{faucris.110545644,
author = {Arfè, G. and Mondillo, N. and Boni, M. and Joachimski, Michael and Balassone, G. and Mormone, A. and Santoro, L. and Medrano, E. Castro},
doi = {10.1016/j.oregeorev.2017.11.022},
faupublication = {yes},
journal = {Ore Geology Reviews},
keywords = {Bongará; Cristal; Nonsulfides; Paleoclimate; Stable isotopes; Supergene},
pages = {1076-1105},
peerreviewed = {Yes},
title = {{The} {Cristal} {Zn} prospect ({Amazonas} region, {Northern} {Peru}). {Part} {II}: {An} example of supergene enrichments in tropical areas},
volume = {95},
year = {2018}
}
@article{faucris.117654064,
abstract = {Reefs developed simultaneously during the latest Sandbian/earliest Katian global Guttenberg Isotopic Carbon Excursion (GICE) in several places across Baltoscandia. Latest Sandbian/earliest Katian patch reefs are also described from the Vasalemma Formation of northern Estonia. The Saku Member of the Vasalemma Formation was previously considered as a proximal facies related to the reefs. However, the Saku Member clearly post-dates the GICE interval and ranges from the latest Keila to Rakvere in terms of regional stages. Some small reefs occur in direct proximity to the stratotype of the Saku Member. New δ
13C data from the stratotype section and the adjacent reefs indicate that these reefs developed before the deposition of the Saku Member during the GICE interval. The chemostratigraphic data support the hypothesis of a short-time Baltoscandian reef growth event that terminated during the GICE interval.},
author = {Kroger, Bjorn and Hints, Linda and Lehnert, Oliver and Mannik, Peep and Joachimski, Michael},
doi = {10.3176/earth.2014.30},
faupublication = {yes},
journal = {Estonian Journal of Earth Sciences},
keywords = {Carbon isotopes; Estonia; GICE excursion; Kope excursion; Oandu Stage; Ordovician reefs},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LG.theear{\_}6},
pages = {271-276},
peerreviewed = {Yes},
title = {{The} early {Katian} ({Late} {Ordovician}) reefs near {Saku}, northern {Estonia} and the age of the {Saku} {Member}, {Vasalemma} {Formation}.},
volume = {63},
year = {2014}
}
@article{faucris.238676414,
author = {Garcia-Ramos, Diego A. and Coric, Stejpan and Joachimski, Michael and Zuschin, Martin},
doi = {10.1017/pab.2020.11},
faupublication = {yes},
journal = {Paleobiology},
pages = {1-25},
peerreviewed = {Yes},
title = {{The} environmental factors limiting the distribution of shallow-water terebratulid brachiopods},
year = {2020}
}
@article{faucris.113873584,
abstract = {A life-size whitish marble statue of a "Virgin with Child" has been recently rediscovered in the St.Rosario church located in Ottaviano, a small town near Naples (southern Italy). This artwork shows stylistic features of the Tuscan-Roman school of the 16th century, and is framed in an intriguing historical context. Historical documents testify that the sculpture was a property of the cadet branch of noble Tuscan family of the Medici, the Medici of Ottaviano. A multianalytical approach has been used to try to indicate the supply area of the white marble of the studied sculpture. Considering the whole mineralogical, petrographic and geochemical data, the source rock can be possibly limited to the main classical white marbles of the Mediterranean district, as the classical marble of Aphrodisias. A reuse practice of a former artwork can be also hypothesized. © 2013 Elsevier Masson SAS.},
author = {Balassone, Giuseppina and Toscano, Maria and Cavazzini, Giancarlo and De Bonis, Alberto and D'Orazio, Loredana and Joachimski, Michael and Weihe, Hogni and Prochaska, Walter and Mondillo, Nicola and Mormone, Angela and Petti, Carmela and Solpietro, Antonia},
doi = {10.1016/j.culher.2013.09.002},
faupublication = {yes},
journal = {Journal of Cultural Heritage},
keywords = {Italian cultural heritage; Marble sculpture; Multi-methodological approach; Provenance},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LG.thehis},
pages = {414-423},
peerreviewed = {Yes},
title = {{The} history of the "{Virgin} with {Child}" sculpture ({Ottaviano}, {Naples}, southern {Italy}): hypotheses from archaeometric multi-technique investigations.},
volume = {15},
year = {2014}
}
@article{faucris.117655164,
author = {Mondillo, N. and Boni, Maria and Balassone, G. and Joachimski, Michael and Mormone, A.},
doi = {10.1016/j.oregeorev.2014.02.003},
faupublication = {yes},
journal = {Ore Geology Reviews},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LG.thejab},
pages = {248-267},
peerreviewed = {Yes},
title = {{The} {Jabali} nonsilfide {Zn}-{Pb}-{Ag} deposit, {Western} {Yemen}.},
volume = {61},
year = {2014}
}
@article{faucris.120861664,
author = {Arfè, G. and Mondillo, N. and Boni, M. and Balassone, G. and Joachimski, Michael and Mormone, A. and Di Palma, T.},
doi = {10.5382/econgeo.2017.4503},
faupublication = {yes},
journal = {Economic Geology},
pages = {1089-1110},
peerreviewed = {Yes},
title = {{The} karst-hosted mina grande nonsulfide zinc deposit, {Bongará} {District} ({Amazonas} {Region}, {Peru})},
volume = {112},
year = {2017}
}
@article{faucris.257370765,
abstract = {The present study reviews the main geochemical, sedimentological, and paleontological events associated with one of the largest perturbations in the Phanerozoic carbon cycle, the Mid-Ludfordian Carbon Isotope Excursion (MLCIE), which is globally documented in Late Silurian marine successions. Climate changes associated with the MLCIE are not yet well documented in contrast to most other Silurian CIEs. We report sea-water surface temperature changes across the entire MLCIE using δ18Oapatite records of conodonts originating from different regions located in temperate as well as tropical paleolatitudes. Significant positive δ18Oapatite excursions (up to 3.8‰) measured in temperate-water areas of the Prague Basin and Carnic Alps (peri-Gondwana) as well as in the tropical areas of Baltica (Laurussia) and Australia (Gondwana) provide evidence for significant global cooling during the MLCIE. The marked cooling of sea surface temperatures, coupled with a significant eustatic sea-level fall recorded on all corresponding paleocontinents, point to a major glaciation in polar and subpolar Gondwana which is denominated here as the “Mid-Ludfordian Glaciation”. The onset of rapid cooling in the Prague Basin (peri-Gondwana) is associated with the deposition of shales enriched in redox-sensitive trace metals suggesting that anoxic/euxinic waters expanded on the deeper carbonate shelf just before the MLCIE. The coincidence of the anoxic event with the Lau/Kozlowskii extinction events is documented for the first time outside of the Laurussian epeiric basins. Widespread oxygen-deficient conditions are interpreted to have been stressful to shelfal ecosystems and may have been a major cause of the extinctions. The Mid-Ludfordian glacio-eustatic sea-level fall caused a reduction of shelf habitats culminating in a lower faunal diversity and a change in the structure of faunal communities. The observed positive δ18Oapatite excursion is tightly coupled to δ13C and δ34S anomalies documented from temperate (peri-Gondwana) as well as tropical (Laurussia) paleolatitudes. The δ18Oapatite data complete the Silurian seawater temperature curve and show evidence that one of the largest positive carbon isotope anomalies (MLCIE) of the Phanerozoic was preceded by a widespread anoxic event and tightly linked with climate cooling event as documented as well for most other Silurian CIEs.
th century B.C.-A.D.79). The building stones used in these areas (volcanic and sedimentary carbonate rocks) have been analysed for their geological, mineralogical, petrographic and geochemical features and have been compared to rocks cropping out on the Sarno River plain - the possible provenances for these building material. Our data indicate that most of the stones employed for the edifices in Pompeii and other related archaeological sites between 6
th century B.C. and A.D. 79 originate from local quarries, mainly situated in several localities on the Sarno River plain itself and in surrounding areas.},
author = {Kastenmeier, Pia and Di Maio, Giovanni and Balassone, Giuseppina and Boni, Maria and Joachimski, Michael and Mondillo, Nicola},
doi = {10.2451/2010PM0020},
faupublication = {yes},
journal = {Periodico Di Mineralogia},
keywords = {Ancient Pompeii; Building stones; Limestone; Paleo-environment; Provenances; Sarno River plain; Travertine; Volcanic rocks},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LG.thesou},
pages = {39-58},
peerreviewed = {Yes},
title = {{The} source of stone building materials from the {Pompeii} archaeological area and its surroundings.},
volume = {2010},
year = {2010}
}
@article{faucris.121655424,
abstract = {The Valanginian records a severe crisis of carbonate systems, both on platforms and in the pelagic realm. This crisis is roughly concomitant with the Weissert Event, characterized by a positive δ
13C excursion of about 2‰ in marine carbonates. However, it is unclear if the response of these two carbonate systems to the global perturbations is contemporaneous, or if they react differently. For this purpose, accumulation rates of pelagic carbonates produced by nannofossils and of platform-derived carbonates have been quantified in a hemipelagic environment (the Vocontian Basin, SE France) that has the potential to record the reaction of both shallow-water and pelagic carbonate production to a major perturbation of the carbon cycle, testified by the isotope excursion. Also, changes through time of clay input have been measured in order to evaluate variations in continental weathering rates, and thus in continent-derived nutrient input and climatic conditions in terms of humidity/aridity. Accumulation rates of pelagic carbonates, of platform-derived carbonates and of clays were calculated on the basis of nannofossil absolute abundance and species-specific masses, of weight percent carbonate content of rocks, and a high-resolution timescale given by cyclostratigraphy. The onset of the positive δ
13C excursion and the demise of the platforms testify for a synchronous, but inverse response of the shallow-water and pelagic carbonate systems to an increase in nutrient influx to marine waters. As carbonate production by nannofossils decreased during the Late Valanginian in time of still low platform production, the low temperature of marine waters coeval to a still high nutrient input recorded in the latest Late Valanginian possibly could explain that both platform and pelagic carbonate production contemporaneously decreased. © 2011 Elsevier B.V.},
author = {Greselle, Benjamin and Pittet, Bernard and Mattioli, Emanuela and Joachimski, Michael and Barbarin, Nicolas and Riquier, Laurent and Reboulet, Stephane and Puceat, Emmanuelle},
doi = {10.1016/j.palaeo.2011.03.027},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
keywords = {δ13C weissert Event; Accumulation rates; Carbonate production crisis; Climate change; Valanginian},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LG.theval},
pages = {41-57},
peerreviewed = {Yes},
title = {{The} {Valanginian} isotope event: {A} complex suite of palaeoenvironmental perturbations.-},
volume = {306},
year = {2011}
}
@article{faucris.110736824,
abstract = {Carbonates occurring as accessory phases within volcanic rocks are often interpreted as being of meteoric water origin. Contary to this model, trace element studies in chloroacetic acid leachates from rocks of the tertiary intracontinental alkaline volcanic field of the Rhoen (Germany) give evidence that the precipitation of the carbonates was imprinted by highly evolved late magmatic fluids. High concentrations of F, Sr, Ba, and the REE indicate that the volcanic rocks were affected by magmatogenic carbonate rich fluids. δ
13C covers a range from -2.9 to -14.2‰ PDB and the δ
18O values lie between 26.9 and 34.2‰ SMOW. The carbon isotopes have primary magmatic character with a shift to isotopic light carbon. The oxygen isotopes indicate equilibration with fluids of a meteoric-hydrothermal system at low temperatures. Based on these data, a two-step model is proposed for the genesis including a first late magmatic stage and a later secondary low temperature alteration.},
author = {Joachimski, Michael and et al.},
author_hint = {Utzmann A., Bausch M., Joachimski Michael},
faupublication = {yes},
journal = {Chemie Der Erde-Geochemistry},
note = {UnivIS-Import:2015-03-05:Pub.1999.nat.dgeo.IGM.LG.tracee},
pages = {105-121.},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Trace} element and stable isotope geochemistry of secondary carbonates in alkaline volcanic rocks of the {Rhoen}, {Germany}.},
year = {1999}
}
@article{faucris.112420704,
author = {Joachimski, Michael and et al.},
author_hint = {Williams B., Halfar J., Steneck R.S., Wortmann U.G., Hetzinger S., Adey W., Lebednik W., Joachimski Michael},
doi = {10.5194/bg-8-165-2011},
faupublication = {yes},
journal = {Biogeosciences},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LG.twenti},
pages = {165-174},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Twentieth} century {d13C} variability in surface water dissolved inorganic carbon recorded by coralline algae in the northern {North} {Pacific} {Ocean} and the {Bering} {Sea}.},
volume = {8},
year = {2011}
}
@article{faucris.110737924,
author = {Joachimski, Michael and et al.},
author_hint = {Heiss G.A., Dullo W.C., Joachimski Michael, Reijmer J.J.G. , Schuhmacher H.},
faupublication = {yes},
journal = {Senckenbergiana Maritima},
note = {UnivIS-Import:2015-03-05:Pub.1999.nat.dgeo.IGM.LG.twocen},
pages = {17-26},
peerreviewed = {unknown},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Two} centuries carbon and oxygen isotope record of {Porites} lutea in the {Golf} of {Aqaba}, {Red} {Sea}.},
year = {1999}
}
@article{faucris.123715504,
abstract = {Lower Triassic marine strata in Spitsbergen accumulated on a mid-to-high latitude ramp in which high-energy foreshore and shoreface facies passed offshore into sheet sandstones of probable hyperpycnite origin. More distal facies include siltstones, shales and dolomitic limestones. Carbon isotope chemostratigraphy comparison allows improved age dating of the Boreal sections and shows a significant hiatus in the upper Spathian. Two major deepening events, in earliest Griesbachian and late Smithian time, are separated by shallowing-upwards trends that culminated in the Dienerian and Spathian substages. The redox record, revealed by changes in bioturbation, palaeoecology, pyrite framboid content and trace metal concentrations, shows anoxic phases alternating with intervals of better ventilation. Only Dienerian-early Smithian time witnessed persistent oxygenation that was sufficient to support a diverse benthic community. The most intensely anoxic, usually euxinic, conditions are best developed in offshore settings, but at times euxinia also developed in upper offshore settings where it is even recorded in hyperpycnite and storm-origin sandstone beds: an extraordinary facet of Spitsbergen's record. The euxinic phases do not track relative water depth changes. For example, the continuous shallowing upwards from the Griesbachian to lower Dienerian was witness to several euxinic phases separated by intervals of more oxic, bioturbated sediments. It is likely that the euxinia was controlled by climatic oscillations rather than intra-basinal factors. It remains to be seen if all the anoxic phases found in Spitsbergen are seen elsewhere, although the wide spread of anoxic facies in the Smithian/Spathian boundary interval is clearly a global event.},
author = {Wignall, Paul B. and Bond, David and Grasby, Stephen and Beauchamp, Benoit and Joachimski, Michael and Blomeier, Dirk and Sun, Yadong and Sun, Yadong},
doi = {10.1017/S0016756815000588},
faupublication = {yes},
journal = {Geological Magazine},
keywords = {anoxia; extinction; shallow marine; Spitsbergen; Triassic},
pages = {316-331},
peerreviewed = {unknown},
title = {{Ultra}-shallow-marine anoxia in an {Early} {Triassic} shallow-marine clastic ramp ({Spitsbergen}) and the suppression of benthic radiation},
volume = {153},
year = {2016}
}
@article{faucris.268485039,
abstract = {The Hangenberg crisis represents a mass extinction marked by a biodiversity turnover at the Devonian-Carboniferous boundary. However, the last million years before this dramatic event have been poorly investigated. Here we report new data on the size and abundances of vertebrate remains as well as carbon isotope data from the latest Famennian in the Montagne Noire (France). A significant decrease in fish abundance and a general reduction in the size of vertebrate remains are observed during a period of stable environment before the onset of the Hangenberg crisis. No perturbations are recorded by the carbon isotopes, supporting the stability of the environment. This significant change in the structuration of vertebrate communities prior to the Hangenberg crisis is not linked to any turnover in other faunal groups. That could be interpreted as changes in faunal repartition that predate mass extinctions.},
author = {Assemat, Alexandre and Girard, Catherine and Joachimski, Michael and Adnet, Sylvain},
doi = {10.3140/bull.geosci.1832},
faupublication = {yes},
journal = {Bulletin of Geosciences},
keywords = {Famennian; Hangenberg; vertebrate teeth; Montagne Noire; vertebrate diversity; carbon isotopes},
month = {Jan},
pages = {109-122},
peerreviewed = {Yes},
title = {{Vertebrate} diversity reveals perturbations in faunal communities prior to the {Hangenberg} event in the {Montagne} {Noire} ({France})},
volume = {97},
year = {2022}
}
@article{faucris.257372265,
abstract = {The expansion of land plants is considered to have played a key role in triggering the Late Paleozoic Ice Age (LPIA), but evidence linking climatic events to terrestrial floral changes is limited. Here, we generated bulk carbonate δ13C, conodont δ18O and 87Sr/86Sr profiles from the lowermost Carboniferous of South China and Vietnam in order to investigate their relationship to contemporaneous land plant evolution. Climatic cooling in the mid-Tournaisian coincided with large perturbations to the global carbon cycle and continental weathering regimes as well as with a major diversification episode among seed plants. These relationships are consistent with terrestrial floral changes triggering intensified weathering of basalts (i.e., lower 87Sr/86Sr), enhanced marine productivity (i.e., higher δ13Ccarb), and reduced atmospheric pCO2 and attendant global cooling (i.e., higher conodont δ18O). The results of our study suggest that expansion of terrestrial floras was a key driver of Early Carboniferous climate change.
18O trends recorded by fish remains and belemnites, confirming the paleoenvironmental origin of oxygen isotope variations. Interestingly, temperatures recorded by pelagic fishes and nektobenthic belemnites and bottom dwelling fishes are comparable during the Late Pliensbachian sea-level lowstand but gradually differ during the Early Toarcian transgressive episode, recording a difference in water temperatures of ~ 6 °C during the Bifrons Zone. This could suggest that the surface-bottom water temperature difference was not large enough during regressive phases to be recorded by organisms living near the lower and upper part of the water column. The globally unradiogenic Nd budget of Euro-boreal waters through the Early Jurassic suggests that these waters were strongly affected by continental neodymium input from surrounding emerged areas and that exchange with more radiogenic waters from the Tethys and Panthalassa oceans remained limited. This supports the existence of a southward directed current in the Euro-boreal area for most of the Early Jurassic. The only exception is observed at the Early-Late Pliensbachian transition where a positive ε
Nd excursion is recorded, suggesting northward influx of low-latitude Tethyan or Panthalassan waters which may have contributed to the warming of NW Tethyan seawater recorded at this time. The absence of a marked negative excursion in ε
Nd concomitant with a negative δ
18O shift recorded during the Falciferum Zone (Exaratum Subzone) argues against the influence of less radiogenic Arctic water influxes with low δ
18O values during this interval. Instead, we suggest that enhanced freshwater inputs related to increasing weathering rates could have contributed to the large δ
18O shift recorded by marine organisms, especially in Euro-boreal contexts. © 2009 Elsevier B.V. All rights reserved.},
author = {Dera, Guillaume and Puceat, Emmanuelle and Pellenard, Pierre and Neige, Pascal and Delsate, Dominique and Joachimski, Michael and Reisberg, Laurie and Martinez, Mathieu},
doi = {10.1016/j.epsl.2009.06.027},
faupublication = {yes},
journal = {Earth and Planetary Science Letters},
keywords = {fish tooth; neodymium isotopes; oxygen isotopes; paleoceanography; paleoclimate; Toarcian},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LG.waterm},
pages = {198-207},
peerreviewed = {Yes},
title = {{Water} mass exchange and variations in seawater temperature in the {NW} {Tethys} during the {Early} {Jurassic}: evidence from neodymium and oxygen isotopes of fish teeth and belemnites},
volume = {286},
year = {2009}
}
@article{faucris.113191364,
author = {Boni, Maria and Mondillo, Nicola and Balassone, Giuseppina and Joachimski, Michael and Colella, A.},
doi = {10.1007/soo531-012-0785-0},
faupublication = {yes},
journal = {International Journal of Earth Sciences},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LG.zincia},
pages = {61-71},
peerreviewed = {Yes},
title = {{Zincian} dolomite related to supergene alteration in the {Iglesias} mining district ({SW} {Sardinia}): {Characterization} and relationships with nonsulfide {Zn} ores.},
volume = {102},
year = {2013}
}