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    Biomarkers and stable isotopic compositions associated with sulfide-rich ancient deposits from mass extinction events

    Melendez Mogollon 2014.pdf (3.787Mb)
    Access Status
    Open access
    Authors
    Melendez Mogollon, Ines Mercedes
    Date
    2014
    Supervisor
    Prof. Kliti Grice
    Type
    Thesis
    Award
    PhD
    
    Metadata
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    Faculty
    Science and Engineering
    School
    Chemistry
    URI
    http://hdl.handle.net/20.500.11937/57604
    Collection
    • Curtin Theses
    Abstract

    This PhD investigates past marine environment affected by ecological crises. Biomarkers and isotopic analyses were conducted in a Devonian-invertebrate and in Early-Triassic samples. Photic zone euxinic conditions and microbial activity are crucial for exceptional biomass preservation. Paradoxically, episodes of free H2S and microbial blooms after the end-Permian extinction, delayed the marine ecosystem recovery. This research has demonstrated organic geochemistry is a powerful tool to improve our understanding of ecosystems evolution and past environmental conditions.

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