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    Radiocarbon Reservoir Ages and Hardwater Effect for the Northeastern Coastal Waters of Argentina

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    Author
    Gómez, Eduardo A.
    Borel, C. Marcela
    Aguirre, Marina L.
    Martínez, Daniel E.
    Issue Date
    2008-01-01
    
    Metadata
    Show full item record
    Citation
    Gómez, E. A., Borel, C. M., Aguirre, M. L., & Martínez, D. E. (2008). Radiocarbon reservoir ages and hardwater effect for the northeastern coastal waters of Argentina. Radiocarbon, 50(1), 119-129.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/653986
    DOI
    10.1017/S003382220004340X
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    Accelerator mass spectrometry (AMS) radiocarbon dates were obtained for 18 mollusk shells collected alive along the Buenos Aires province coast, Argentina, over the period AD 1914-1935. Reservoir ages were estimated for all samples on the basis of the tree-ring calibration curve for the Southern Hemisphere (SHCal04, McCormac et al. 2004) and the marine ΔR values calculated as the difference between the conventional 14C age and the age deduced from the marine, mixed-layer model calculation (Marine04, Hughen et al. 2004). For most coastal locations, a great ΔR scatter was observed, ranging from 191 to 2482 yr, which is explained by the input of varying content of dissolved carbonate by rivers and groundwater (hardwater effect) and indicates a serious limitation for shell-based 14C chronologies. Within the interior of Baha Blanca estuary, ΔR values ranged from 40 to 50 +/- 46 as a consequence of the local geological particularities of the environment. This suggests that, with some restrictions, the marine calibration curve with standard parameters (ΔR = 0) could be used at this location.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S003382220004340X
    Scopus Count
    Collections
    Radiocarbon, Volume 50, Number 1 (2008)

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