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    SEDIMENTS FROM AROUND THE LOWER YOUNGER DRYAS BOUNDARY (SE ARIZONA, USA): IMPLICATIONS FROM LA-ICP-MS MULTI-ELEMENT ANALYSIS

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    Andronikov_Version3.pdf
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    Final Accepted Manuscript
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    Author
    ANDRONIKOV, ALEXANDRE V.
    ANDRONIKOVA, IRINA E.
    Affiliation
    Univ Arizona, Dept Geosci
    Univ Arizona, Lunar & Planetary Lab
    Issue Date
    2016-09
    Keywords
    Sediments
    Trace elements
    Younger Dryas
    
    Metadata
    Show full item record
    Publisher
    WILEY-BLACKWELL
    Citation
    SEDIMENTS FROM AROUND THE LOWER YOUNGER DRYAS BOUNDARY (SE ARIZONA, USA): IMPLICATIONS FROM LA-ICP-MS MULTI-ELEMENT ANALYSIS 2016, 98 (3):221 Geografiska Annaler: Series A, Physical Geography
    Journal
    Geografiska Annaler: Series A, Physical Geography
    Rights
    © 2016 Swedish Society for Anthropology and Geography
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    One of the prominent features in sediment sequences formed around the AllerOd-Younger Dryas transition (c. 12.9-12.8 ka bp) in North America is a dark layer of organic-rich material, i.e. the black mat. The black mat sequences in southeast Arizona contain a thin sandy basal layer corresponding to the lower Younger Dryas boundary. Trace element concentrations in the lower Younger Dryas boundary sediments, in the black mat, in the host sediments, and in charcoal from Western Europe and southeast Arizona were studied using LA-ICP-MS. The black mat samples and samples of the underlying host sediments display compositions similar to the average continental crust, while the sediments from the lower Younger Dryas boundary are enriched in rare earth elements, Ni, and Co whereas Ta, Nb, Zr, and Hf are depleted relative to the rare earth elements. Such a difference in compositions between the lower Younger Dryas boundary sediments and other sediments points to a short enigmatic event, which changed conditions of sedimentation just before the onset of the Younger Dryas cooling. The presence of products of biomass burning of still unknown origin is suggested on the basis of trace element features of sediments from the lower Younger Dryas boundary.
    Note
    Version of Record online : 14 JUL 2016; 24 Month Embargo.
    ISSN
    04353676
    DOI
    10.1111/geoa.12132
    Version
    Final accepted manuscript
    Sponsors
    NAI International Collaboration Fund
    Additional Links
    http://doi.wiley.com/10.1111/geoa.12132
    ae974a485f413a2113503eed53cd6c53
    10.1111/geoa.12132
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