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Carbonate dissolution episodes in Paleocene and Eocene sediment, Shatsky Rise, west-central Pacific

Episodes of oceanic acidification throughout the early Cenozoic (~45–33.7 Ma) measured using plankton shell dissolution.
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    Data record related to this publication Carbonate dissolution episodes in Paleocene and Eocene sediment, Shatsky Rise, west-central Pacific
    Data Publication title Carbonate dissolution episodes in Paleocene and Eocene sediment, Shatsky Rise, west-central Pacific
  • Description

    Episodes of oceanic acidification throughout the early Cenozoic (~45–33.7 Ma) measured using plankton shell dissolution.

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    • Descriptor

      In this study, we document intervals of carbonate dissolution in these records by examining temporal changes in four parameters: carbonate content, coarse size fraction (>38 µm), benthic foraminiferal abundance, and planktonic foraminiferal fragmentation ratio. Carbonate content is not a sensitive indicator of carbonate dissolution in the studied sections, although rare intervals of low carbonate may reflect times of relatively high dissolution. The proportion of coarse size fraction does not accurately record carbonate dissolution either because the relative abundance of nannofossils largely determines the grain-size distribution. Benthic abundance and fragmentation covary (r2 = 0.77) and are probably the best indicators for carbonate dissolution. For both holes, records of these parameters indicate two episodes of prominent dissolution. The first of these occurs in the upper Paleocene (~59–58 Ma) and the second in the middle to upper Eocene (~45–33.7 Ma). Other intervals of enhanced carbonate dissolution are located in the upper Paleocene (~56 Ma) and in the upper lower Eocene (~51 Ma). Enhanced preservation of planktonic foraminiferal assemblages marks the start of both the Paleocene and Eocene epochs.

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      Descriptor type Full
    • Descriptor

      Data in csv and open document spreadsheet(ods) format.

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  • Keywords
    • ccd
    • carbonate dissolution
    • Ocean acidification
    • cenozoic
    • Global Warming
    • paleogene
    • paleocene
    • Eocene
    • planktic foraminifera
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  • Research grant(s)/Scheme name(s)
    • Research themes
    Tropical Ecosystems, Conservation and Climate Change
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  • Start Date 2002/08/01
  • End Date 2006/01/01
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  • Locations
    • Southern Shatsky Rise, west-central Pacific Ocean.
- Data
    Data Locations

    Type Location Notes
    Physical Location School of Earth and Environmental Science James Cook University Townsville QLD 4811
    Attachment Early Paleogene Carbonate Dissolution Data Shatsky Rise Haidi Beard.zip
    The Data Manager is: Haidi Beard
    College or Centre
    Access conditions Open: free access under license
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- Citation
    Citation Beard, Haidi (2012): Carbonate dissolution episodes in Paleocene and Eocene sediment, Shatsky Rise, west-central Pacific. James Cook University. https://research.jcu.edu.au/data/published/79a13547d592ed3065b8a51b6d5af976