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Evidence for volcanism and weathering during the Permian-Triassic mass extinction from Meishan (South China) osmium isotope record

Liu, Zeyang; Selby, David; Zhang, Hua; Shen, Shuzhong

Evidence for volcanism and weathering during the Permian-Triassic mass extinction from Meishan (South China) osmium isotope record Thumbnail


Authors

Zeyang Liu

Hua Zhang

Shuzhong Shen



Abstract

The Permian–Triassic mass extinction event is the most severe biotic crisis during the Phanerozoic. The trigger of this event has been widely linked with massive volcanic activity associated with the Siberian Traps Large Igneous Province. However, the direct link is still lacking to fully understand the event. In this study, we apply osmium isotope (187Os/188Os, or Osi) stratigraphy across the Permian–Triassic boundary interval in the Meishan section of South China. The Os isotope stratigraphy reveals multiple shifts to more unradiogenic 187Os/188Os composition that are interpreted to reflect pulses of volcanism across the mass extinction interval. Additionally, a shift to a more radiogenic 187Os/188Os composition is also found immediately above the mass extinction interval, which is taken to reflect the enhanced weathering of the continental crust in response to greenhouse gas release into the atmosphere and the associated hyperthermal.

Citation

Liu, Z., Selby, D., Zhang, H., & Shen, S. (2020). Evidence for volcanism and weathering during the Permian-Triassic mass extinction from Meishan (South China) osmium isotope record. Palaeogeography, Palaeoclimatology, Palaeoecology, 553, Article 109790. https://doi.org/10.1016/j.palaeo.2020.109790

Journal Article Type Article
Acceptance Date May 3, 2020
Online Publication Date May 11, 2020
Publication Date Sep 1, 2020
Deposit Date May 12, 2020
Publicly Available Date May 11, 2021
Journal Palaeogeography, Palaeoclimatology, Palaeoecology
Print ISSN 0031-0182
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 553
Article Number 109790
DOI https://doi.org/10.1016/j.palaeo.2020.109790

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