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    The onset of the permo-carboniferous glaciation: Reconciling global stratigraphic evidence with biogenic apatite δ18O records in the late Visean

    185600_185600.pdf (401.2Kb)
    Access Status
    Open access
    Authors
    Barham, Milo
    Murray, J.
    Joachimski, M.
    Williams, D.
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Barham, M. and Murray, J. and Joachimski, M.M. and Williams, D.M. 2012. The onset of the permo-carboniferous glaciation: Reconciling global stratigraphic evidence with biogenic apatite δ18O records in the late Visean. Journal of the Geological Society. 169 (2): pp. 119-122.
    Source Title
    Journal of the Geological Society
    DOI
    10.1144/0016-76492011-102
    ISSN
    00167649
    School
    Department of Applied Geology
    Remarks

    Accepted for publication in the Journal of the Geological Society as of the 15th of December 2011.

    URI
    http://hdl.handle.net/20.500.11937/12195
    Collection
    • Curtin Research Publications
    Abstract

    The δ18O values of phosphatic microfossils recovered from NW Ireland are used to determine the timing and magnitude of cooling associated with the onset of the Carboniferous glaciation. Microfossil fish δ18Oapatite demonstrates a +2.4‰ (V-SMOW) shift, which, once corrected for δ18Oseawater changes owing to evolving ice volumes, equates to an approximate 4.5°C reduction in equatorial sea surface temperature between the earliest Asbian and the mid-Brigantian (late Visean). Both conodont and microfossil fish δ18Oapatite indicate stabilization of an ‘icehouse’ climate during the Brigantian and into the Serpukhovian. Substantial late Visean cooling identified herein is in good agreement with global glacioeustatic records.

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