Photic Zone Euxinia During the Permian-Triassic Superanoxic Event | Zendy

Kliti Grice | Zendy; Changqun Cao | Zendy; Gordon D. Love | Zendy; Michael E. Böttcher | Zendy; Richard J. Twitchett | Zendy; Emmanuelle Grosjean | Zendy; Roger E. Summons | Zendy; Steven C. Turgeon | Zendy; William Dunning | Zendy; Yugan Jin | Zendy

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Photic Zone Euxinia During the Permian-Triassic Superanoxic Event

Author(s) -

Kliti Grice,

Changqun Cao,

Gordon D. Love,

Michael E. Böttcher,

Richard J. Twitchett,

Emmanuelle Grosjean,

Roger E. Summons,

Steven C. Turgeon,

William Dunning,

Yugan Jin

Publication year - 2005

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.1104323

Subject(s) - permian–triassic extinction event , anoxygenic photosynthesis , geology , photic zone , extinction event , permian , paleontology , phanerozoic , structural basin , phototroph , ecology , cenozoic , phytoplankton , biological dispersal , population , demography , sociology , biology , nutrient , bacteria

Carbon and sulfur isotopic data, together with biomarker and iron speciation analyses of the Hovea-3 core that was drilled in the Perth Basin, Western Australia, indicate that euxinic conditions prevailed in the paleowater column during the Permian-Triassic superanoxic event. Biomarkers diagnostic for anoxygenic photosynthesis by Chlorobiaceae are particularly abundant at the boundary and into the Early Triassic. Similar conditions prevailed in the contemporaneous seas off South China. Our evidence for widespread photiczone euxinic conditions suggests that sulfide toxicity was a driver of the extinction and a factor in the protracted recovery.

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