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Transient Permian-Triassic euxinia in the southern Panthalassa deep ocean

Takahashi, S; Strachan, L; Yin, R; Wignall, P B; Bond, D P G; Grasby, S E

Authors

S Takahashi

L Strachan

R Yin

P B Wignall

S E Grasby



Abstract

Both the duration and severity of deep-water anoxic conditions across the Permo-Triassic mass extinction (PTME) is controversial. Panthalassa Ocean circulation models yield varying results, ranging from a well-ventilated deep ocean to rapidly developing northern, but not southern, latitude anoxia in response to Siberian Traps driven global warming. To address this uncertainty we examined a southern paleo-latitude pelagic record. Trace metal and pyrite framboid data suggest bottom water euxinic conditions developed in the southern Panthalassa Ocean at the PTME, coincident with enhanced volcanic activity indicated by Hg geochemistry. While a global ocean euxinic event at the PTME placed extraordinary stress on marine life, southern surface waters appear to have recovered more quickly as radiolarian populations return several million years before they do in northern Panthalassa.

Citation

Takahashi, S., Strachan, L., Yin, R., Wignall, P. B., Bond, D. P. G., & Grasby, S. E. (in press). Transient Permian-Triassic euxinia in the southern Panthalassa deep ocean. Geology, https://doi.org/10.1130/G48928.1

Journal Article Type Article
Acceptance Date Feb 12, 2021
Online Publication Date Apr 15, 2021
Deposit Date Feb 18, 2021
Publicly Available Date Apr 16, 2021
Journal Geology
Print ISSN 0091-7613
Publisher Geological Society of America
Peer Reviewed Peer Reviewed
DOI https://doi.org/10.1130/G48928.1
Public URL https://hull-repository.worktribe.com/output/3726310

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