Massive volcanism at the Permian-Triassic boundary and its impact on the isotopic composition of the ocean and atmosphere

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Korte C, Pande P, Kalia P, Kozur HW, Joachimski M, Oberhaensli H
Zeitschrift: Journal of Asian Earth Sciences
Verlag: Elsevier
Jahr der Veröffentlichung: 2010
Band: 37
Seitenbereich: 299-311
ISSN: 1367-9120


Abstract


Bulk carbonate and conodonts from three Permian-Triassic (P-T) boundary sections at Guryul Ravine (Kashmir), Abadeh (central Iran) and Pufels/Bula/Bulla (Italy) were investigated for δ13C and δ18O. 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 δ13C 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 δ13C trend matches in time and magnitude the eruption of the Siberian Traps and other contemporaneous volcanism, suggesting that volcanogenic effects, such as outgassed CO2 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.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Joachimski, Michael Prof. Dr.
Lehrstuhl für Geologie (Exogene Dynamik)


Einrichtungen weiterer Autorinnen und Autoren

Freie Universität Berlin
Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum - GFZ
University of Delhi


Zitierweisen

APA:
Korte, C., Pande, P., Kalia, P., Kozur, H.W., Joachimski, M., & Oberhaensli, H. (2010). Massive volcanism at the Permian-Triassic boundary and its impact on the isotopic composition of the ocean and atmosphere. Journal of Asian Earth Sciences, 37, 299-311. https://dx.doi.org/10.1016/j.jseaes.2009.08.012

MLA:
Korte, Christoph, et al. "Massive volcanism at the Permian-Triassic boundary and its impact on the isotopic composition of the ocean and atmosphere." Journal of Asian Earth Sciences 37 (2010): 299-311.

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