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dc.contributor.authorANDRONIKOV, ALEXANDRE V.
dc.contributor.authorANDRONIKOVA, IRINA E.
dc.date.accessioned2016-12-07T20:47:19Z
dc.date.available2016-12-07T20:47:19Z
dc.date.issued2016-09
dc.identifier.citationSEDIMENTS 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 Geographyen
dc.identifier.issn04353676
dc.identifier.doi10.1111/geoa.12132
dc.identifier.urihttp://hdl.handle.net/10150/621537
dc.description.abstractOne 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.
dc.description.sponsorshipNAI International Collaboration Funden
dc.language.isoenen
dc.publisherWILEY-BLACKWELLen
dc.relation.urlhttp://doi.wiley.com/10.1111/geoa.12132en
dc.rights© 2016 Swedish Society for Anthropology and Geography.en
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectSedimentsen
dc.subjectTrace elementsen
dc.subjectYounger Dryasen
dc.titleSEDIMENTS FROM AROUND THE LOWER YOUNGER DRYAS BOUNDARY (SE ARIZONA, USA): IMPLICATIONS FROM LA-ICP-MS MULTI-ELEMENT ANALYSISen
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Dept Geoscien
dc.contributor.departmentUniv Arizona, Lunar & Planetary Laben
dc.identifier.journalGeografiska Annaler: Series A, Physical Geographyen
dc.description.noteVersion of Record online : 14 JUL 2016; 24 Month Embargo.en
dc.description.collectioninformationThis 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.en
dc.eprint.versionFinal accepted manuscripten
dc.contributor.institutionDepartment of Geosciences; University of Arizona; Tucson AZ USA
dc.contributor.institutionLunar and Planetary Laboratory; University of Arizona; Tucson AZ USA
html.description.abstractOne 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.


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