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    Radiocarbon Dating of Individual Fatty Acids as a Tool for Refining Antarctic Margin Sediment Chronologies

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    Author
    Ohkouchi, Naohiko
    Eglinton, Timothy I.
    Hayes, John M.
    Issue Date
    2003-01-01
    Keywords
    Ross Sea
    Southern Ocean
    fatty acids
    marine sedimentation
    Antarctica
    inorganic materials
    sedimentation
    sedimentation rates
    marine sediments
    organic acids
    Holocene
    upper Holocene
    organic compounds
    sediments
    Cenozoic
    Quaternary
    C 14
    carbon
    isotopes
    radioactive isotopes
    absolute age
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    Citation
    Ohkouchi, N., Eglinton, T. I., & Hayes, J. M. (2003). Radiocarbon dating of individual fatty acids as a tool for refining Antarctic margin sediment chronologies. Radiocarbon, 45(1), 17-24.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/654907
    DOI
    10.1017/S0033822200032355
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    We have measured the radiocarbon contents of individual, solvent-extractable, short-chain (C14, C16, and C18) fatty acids isolated from Ross Sea surface sediments. The corresponding 14C ages are equivalent to that of the post-bomb dissolved inorganic carbon (DIC) reservoir. Moreover, molecular 14C variations in surficial (upper 15 cm) sediments indicate that these compounds may prove useful for reconstructing chronologies of Antarctic margin sediments containing uncertain (and potentially variable) quantities of relict organic carbon. A preliminary molecular 14C chronology suggests that the accumulation rate of relict organic matter has not changed during the last 500 14C yr. The focus of this study is to determine the validity of compound-specific 14C analysis as a technique for reconstructing chronologies of Antarctic margin sediments.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200032355
    Scopus Count
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    Radiocarbon, Volume 45, Number 1 (2003)

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