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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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    Author
    Ohkouchi, Naohiko
    Eglinton, Timothy I.
    Hughen, Konrad A.
    Roosen, Ellen
    Keigwin, Lloyd D.
    Issue Date
    2005-01-01
    
    Metadata
    Show full item record
    Citation
    Ohkouchi, N., Eglinton, T. I., Hughen, K. A., Roosen, E., & Keigwin, L. D. (2005). Radiocarbon dating of Alkenones from marine sediments: III. Influence of solvent extraction procedures on 14C measurements of foraminifera. Radiocarbon, 47(3), 425-432.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/653690
    DOI
    10.1017/S0033822200035207
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    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 ∆14C 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).
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200035207
    Scopus Count
    Collections
    Radiocarbon, Volume 47, Number 3 (2005)

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