TRACE ELEMENT DISTRIBUTION AND IMPLICATIONS IN SEDIMENTS ACROSS THE ALLERØD–YOUNGER DRYAS BOUNDARY IN THE NETHERLANDS AND BELGIUM |
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| Authors: | ALEXANDRE V ANDRONIKOV ANNELIES VAN HOESEL IRINA E ANDRONIKOVA WIM Z HOEK |
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| Affiliation: | 1. Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA;2. Division of Geochemistry and Laboratories, Czech Geological Survey, Prague, Czech Republic;3. Leiden University, Faculty of Archaeology, Leiden, The Netherlands;4. Utrecht University, Faculty of Geoscience, Utrecht, The Netherlands |
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| Abstract: | In the Northern Hemisphere, the Younger Dryas cooling occurred between 12.8 and 11.7 ka bp . This cooling is thought to have been the result of an abrupt change in atmospheric and oceanic circulations. One of the hypotheses explaining such a change suggests that just before the onset of the Younger Dryas cooling, multiple airbursts/impacts occurred over the Northern Hemisphere. We studied the late Pleistocene sediments from the Netherlands and Belgium to check whether a sudden short event might have taken place just before the onset of the Younger Dryas cooling. The geochemical features revealed suggest that such events might have occurred. The presence of products of biomass burning is suggested on the basis of trace element features of sediments from the lower Younger Dryas boundary. The presence of a volcanic component and a component resulting from extensive biomass burning in the sediments of c. 12.9 ka bp are indicated on the basis of trace element features. The volcanic component may be related to the Laacher See volcano eruption, whereas the cause of the extensive biomass burning remains unclear. |
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| Keywords: | geochemistry late Pleistocene sediments trace elements |
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