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    Using the 14C Bomb Pulse to Date Young Speleothems

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    Author
    Hodge, Ed
    McDonald, Janece
    Fischer, Matthew
    Redwood, Dale
    Hua, Quan
    Levchenko, Vladimir
    Drysdale, Russell
    Waring, Chris
    Fink, David
    Issue Date
    2011-01-01
    
    Metadata
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    Citation
    Hodge, E., McDonald, J., Fischer, M., Redwood, D., Hua, Q., Levchenko, V., ... & Fink, D. (2011). Using the 14C bomb pulse to date young speleothems. Radiocarbon, 53(2), 345-357.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/654381
    DOI
    10.1017/S0033822200056605
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    Three modern speleothems were sampled at high resolution for radiocarbon analysis to identify their bomb-pulse signatures and to construct chronologies. Each speleothem exhibited a different 14C response, presumed to be related to site characteristics such as vegetation, temperature, rainfall, depth below the surface, and water pathway through the aquifer. Peak 14C activity for WM4 is 134.1 pMC, the highest cited thus far in the literature and suggestive of a lower inertia at this site. Dead carbon fractions for each stalagmite were calculated and found to be relatively similar for the 3 speleothems and lower than those derived from Northern Hemisphere speleothems. An inverse modeling technique based on the work of Genty and Massault (1999) was used to estimate soil carbon residence times. For each speleothem, mean soil 14C reservoir ages differed greatly between the 3 sites, ranging from 2-6.5 to 32-46 yr.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200056605
    Scopus Count
    Collections
    Radiocarbon, Volume 53, Number 2 (2011)

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