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    Elevated pCO2 leading to Late Triassic extinction, persistent photic zone euxinia, and rising sea levels

    Access Status
    Fulltext not available
    Authors
    Jaraula, Caroline
    Grice, Kliti
    Twitchett, R.
    Bottcher, M
    Le Metayer, P.
    Dastidar, A.
    Opazo, L.
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Jaraula, Caroline M.B. and Grice, Kliti and Twitchett, Richard J. and Bottcher, Michael E. and LeMetayer, Pierre and Dastidar, Apratim G. and Opazo, L. Felipe 2013. Elevated pCO2 leading to Late Triassic extinction, persistent photic zone euxinia, and rising sea levels. Geology. 41 (9): pp. 955-958.
    Source Title
    Geology
    DOI
    10.1130/G34183.1
    Additional URLs
    http://geology.gsapubs.org/content/early/2013/07/10/G34183.1
    ISSN
    0091-7613
    URI
    http://hdl.handle.net/20.500.11937/4379
    Collection
    • Curtin Research Publications
    Abstract

    The Late Triassic mass extinction event is the most severe global warming–related crisis to have affected important extant marine groups such as scleractinian corals, and offers potential insights into climate change scenarios. Here we present evidence from Chlorobi-derived biomarkers of episodic and persistent photic zone euxinia. From biomarkers and stable carbon isotopes, we present evidence of rapid mixing of atmospheric and oceanic carbon reservoirs. Global versus regional trends are resolved in kerogen organic matter type, carbonate 13C, and bulk and pyrite 34S. This suite of data demonstrates for the fi rst time a comprehensive organic and stable isotope geochemical reconstruction of events leading up to the Late Triassic extinction event and its aftermath. The cascade of events prior to, during, and after the extinction is remarkably similar to those reported for the Late Permian extinction, the largest extinction event of the Phanerozoic. We predict that similar conditions will have occurred during all past episodes of rapid global warming and biotic crisis that are associated with similar rises in pCO2.

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