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    Comparison of Radiocarbon Ages from Different Organic Fractions in Tropical Peat Cores: Insights from Kalimantan, Indonesia

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    Author
    Wüst, Raphael A. J.
    Jacobsen, Geraldine E.
    van der Gaast, Haitse
    Smith, Andrew M.
    Issue Date
    2008-01-01
    
    Metadata
    Show full item record
    Citation
    Wüst, R. A. J., Jacobsen, G. E., van der Gaast, H., & Smith, A. M. (2008). Comparison of radiocarbon ages from different organic fractions in tropical peat cores: Insights from Kalimantan, Indonesia. Radiocarbon, 50(3), 359-372.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/653841
    DOI
    10.1017/S0033822200053492
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    Various organic fractions of an Indonesian tropical peat deposit were dated using radiocarbon accelerator mass spectrometry (AMS). Four different depth layers, deposited during the last 28,000 14C yr, were analyzed and the data compared to bulk sample analyses. The pollen extracts consistently produced the oldest dates. The bulk samples (<250 mu-m and <100 mu-m) often yielded the youngest dates. The age difference between the individual fractions depended on the layer depth and hence the true age of the sampled peats. The age discrepancy was highest (~16,000 14C yr) in the oldest peat material. We interpret this to be a consequence of the input of organic matter over a long period of time, with peat oxidation and/or no peat accumulation during the last glacial maximum (LGM). The age discrepancies were smaller (between 10 and 900 14C yr) for the Holocene peat samples. It was concluded that the pollen extract fraction might be the most reliable fraction for dating tropical peat deposits that are covered by deeply rooting vegetation.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200053492
    Scopus Count
    Collections
    Radiocarbon, Volume 50, Number 3 (2008)

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