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    AMS Radiocarbon Dating Problems between 10 and 8 ka BP in Lacustrine Deposits from Lake Gun Nur, Northern Mongolia

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    Author
    Chang, F. Q.
    Zhang, H. C.
    Ming, Q. Z.
    Chen, G. J.
    Zhang, W. X.
    Shi, Z. T.
    Feng, Z. D.
    Issue Date
    2011-09-16
    
    Metadata
    Show full item record
    Citation
    Chang, F. Q., Zhang, H. C., Ming, Q. Z., Chen, G. J., Zhang, W. X., Shi, Z. T., & Feng, Z. D. (2011). AMS radiocarbon dating problems between 10 and 8 ka BP in lacustrine deposits from Lake Gun Nur, Northern Mongolia. Radiocarbon, 53(3), 501-509.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/654729
    DOI
    10.1017/S0033822200034615
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    Accelerator mass spectrometry (AMS) radiocarbon dating a continuous core from Lake Gun Nur, northern Mongolia, shows a period between 10 and 8 ka BP that could not be dated accurately. Further dating on alkali-insoluble residue and humic acid from the same samples in the Gun Nur core suggest that this AMS 14C date anomaly is neither analytical nor material related. We hypothesize that the 14C anomaly may be derived from increasing production rates of 14C caused by diminished solar activity, a low 14CO2/14CO ratio in the atmosphere, or an unstable 14C flux in the lower atmosphere caused by changing geomagnetic field strength. Our results imply that the 14C data used for 14C age calibration cannot correct the age-depth regression between 8 and 10 ka BP to fit the age-depth model along with other time intervals.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200034615
    Scopus Count
    Collections
    Radiocarbon, Volume 53, Number 3 (2011)

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