Climate warming, euxinia and carbon isotope perturbations during the Carnian (Triassic) Crisis in South China

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Sun Y, Wignall PB, Joachimski M, Bond DPG, Grasby SE, Lai XL, Wang LN, Zhang ZT, Sun S, Sun Y
Zeitschrift: Earth and Planetary Science Letters
Verlag: Elsevier
Jahr der Veröffentlichung: 2016
Band: 444
Seitenbereich: 88-100
ISSN: 0012-821X


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).



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Joachimski, Michael Prof. Dr.
Lehrstuhl für Geologie (Exogene Dynamik)
Sun, Yadong Dr.
Lehrstuhl für Geologie (Exogene Dynamik)
Sun, Yadong Dr.
Geozentrum Nordbayern


Einrichtungen weiterer Autorinnen und Autoren

China University of Geosciences / 中国地质大学
Geological Survey of Canada (GSC) / Commission géologique du Canada (CGC)
University of Hong Kong (HKU) / 香港大學
University of Hull
University of Leeds


Zitierweisen

APA:
Sun, Y., Wignall, P.B., Joachimski, M., Bond, D.P.G., Grasby, S.E., Lai, X.L.,... Sun, Y. (2016). Climate warming, euxinia and carbon isotope perturbations during the Carnian (Triassic) Crisis in South China. Earth and Planetary Science Letters, 444, 88-100. https://dx.doi.org/10.1016/j.epsl.2016.03.037

MLA:
Sun, Yadong, et al. "Climate warming, euxinia and carbon isotope perturbations during the Carnian (Triassic) Crisis in South China." Earth and Planetary Science Letters 444 (2016): 88-100.

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Zuletzt aktualisiert 2018-12-11 um 20:50