Photic zone euxinia during the Permian-Triassic superanoxic event

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

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    688 Citations (Scopus)


    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 photic-zone euxinic conditions suggests that sulfide toxicity was a driver of the extinction and a factor in the protracted recovery.

    Original languageEnglish
    Pages (from-to)706-709
    Number of pages4
    Issue number5710
    Publication statusPublished - 4 Feb 2005


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