Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Molybdenum isotopic evidence for oxic marine conditions during the latest Permian extinction

    Access Status
    Fulltext not available
    Authors
    Proemse, Bernadette
    Grasby, S.
    Wieser, M.
    Mayer, B.
    Beauchamp, B.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Proemse, B. and Grasby, S. and Wieser, M. and Mayer, B. and Beauchamp, B. 2013. Molybdenum isotopic evidence for oxic marine conditions during the latest Permian extinction. Geology. 41: pp. 967-970.
    Source Title
    Geology
    DOI
    10.1130/G34466.1
    ISSN
    0091-7613
    School
    University of Calgary
    URI
    http://hdl.handle.net/20.500.11937/49374
    Collection
    • Curtin Research Publications
    Abstract

    The latest Permian extinction (LPE), ca. 252 Ma, represents the most severe extinctionevent in Earth’s history. The cause is still debated, but widespread marine anoxicto euxinic (H2S rich) conditions, from deep to shallow water environments, are commonlysuggested. As a proxy for marine oxygen levels, we analyzed d98/95Mo of two LPEsections that represent a gradient in water depth on the northwest margin of Pangea.Results from deep-water slope environments show a large shift in d98/95Mo values from–2.02‰ to +2.23‰ at the extinction horizon, consistent with onset of euxinic conditions. Incontrast, sub-storm wave base shelf environments show little change in the molybdenum isotopic composition (–1.34‰ to +0.05‰), indicating ongoing oxic conditions across the LPE.These results indicate that areas of the continental shelf of northwest Pangea underwent massextinction under oxic conditions throughout the LPE event, and that shallow-water anoxiawas therefore not a global phenomenon.

    Related items

    Showing items related by title, author, creator and subject.

    • Characterisation of aquatic natural organic matter by micro-scale sealed vessel pyrolysis
      Berwick, Lyndon (2009)
      The analytical capacity of MSSV pyrolysis has been used to extend the structural characterisation of aquatic natural organic matter (NOM). NOM can contribute to various potable water issues and is present in high ...
    • Malodorous dimethylpolysulfides in Perth drinking water.
      Heitz, Anna (2002)
      The formation of an objectionable "swampy" odour in drinking water distribution systems in Perth, Western Australia, was first described by Wajon and co-authors in the mid-1980s (Wajon et al., 1985; Wajon et al., 1986; ...
    • The development of a rigorous nanocharacterization scheme for electrochemical systems
      Veder, Jean-Pierre M. (2010)
      This thesis reports on a methodology for the nanocharacterization of complex electrochemical systems. A series of powerful techniques have been adapted and applied to studies of two scientifically important electrochemical ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.