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    Radiocarbon dating of alkenones from marine sediments : III. Influence of solvent extraction procedures on 14C measurements of foraminifera

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    Date
    2005
    Author
    Ohkouchi, Naohiko  Concept link
    Eglinton, Timothy I.  Concept link
    Hughen, Konrad A.  Concept link
    Roosen, Ellen  Concept link
    Keigwin, Lloyd D.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/4392
    As published
    https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/2836
    Abstract
    As a result of the growing use of multiple geochemical proxies to reconstruct ocean and climate changes in the past, there is an increasing need to establish temporal relationships between proxies derived from the same marine sediment record and ideally from the same core sections. Coupled proxy records of surface ocean properties, such as those based on lipid biomarkers (e.g. alkenone-derived sea surface temperature) and planktonic foraminiferal carbonate (oxygen isotopes), are a key example. Here, we assess whether 2 different solvent extraction procedures used for isolation of molecular biomarkers influence the radiocarbon contents of planktonic foraminiferal carbonate recovered from the corresponding residues of Bermuda Rise and Cariaco Basin sediments. Although minor Δ14C differences were observed between solvent-extracted and unextracted samples, no substantial or systematic offsets were evident. Overall, these data suggest that, in a practical sense, foraminiferal shells from a solvent-extracted residue can be reliably used for 14C dating to determine the age of sediment deposition and to examine age relationships with other sedimentary constituents (e.g. alkenones).
    Description
    Author Posting. © Arizona Board of Regents on behalf of the University of Arizona, 2005. This article is posted here by permission of Dept. of Geosciences, University of Arizona for personal use, not for redistribution. The definitive version was published in Radiocarbon 47 (2005): 425-432.
    Collections
    • Geology and Geophysics (G&G)
    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Radiocarbon 47 (2005): 425-432
     
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