Testing mathematical uranium migration models in combined ESR/U-series dating of fossil teeth from open-air sites |
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| Institution: | 1. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China;2. Département de Préhistoire Muséum National d''Histoire Naturelle, UMR7194 du CNRS, 1, rue René Panhard 75013, Paris, France;1. Department of Geology, Lund University, Sölvegatan 12, SE-223 62 Lund, Sweden;2. Department of Environmental Sciences, Norwegian University of Life Sciences, PO Box 5003, NO-1432 Ås, Norway;1. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China;2. The Department of Earth Sciences, The University of Hong Kong, Hong Kong, China;3. Centre for Archaeological Science, School of Earth and Environmental Sciences, University of Wollongong, Australia;4. CAEP, MOE Key Laboratory of Western China''s Environmental Systems, Lanzhou University, Lanzhou, China;1. Key Laboratory of Physical Geography and Environmental Processes of Qinghai Province, Qinghai Normal University, 810000 Xining, PR China;2. School of Earth Sciences, China University of Geosciences, Wuhan 430074, PR China;3. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, 810008 Xining, PR China;1. Department of Applied Physics, Okayama University of Science, Okayama, 700-0005, Japan;2. Humanities and Social Sciences, Nara Women''s University, Nara, 630-8506, Japan;3. Department of Environmental Systems, Rissho University, Kumagaya, 360-0194, Japan;1. University of Washington, Department of Anthropology, Box 353412, Seattle, WA 98195-3412, USA;2. McDaniel College, Department of Physics, Westminster, MD 21157, USA;1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710061, China;2. Research Institute of Shaanxi Yanchang Petroleum (Group) Co., LTD, Xi''an 710075, China |
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| Abstract: | Several mathematical models have been suggested to describe uranium migration kinetics for ESR dating of fossil tooth. In the present study, different U-uptake models were used to calculate ages for fossil teeth from two open-air Paleolithic sites in Nihewan Basin – Donggutuo and Hougou and compared with independent age control of the sites. For Donggutuo site, the results show that the ages of three teeth calculated by EU and AU models were much younger than magnetostratigraphic age. At Hougou site, two teeth from the top of Nihewan lacustrine deposits give the consistent EU and AU ages within errors but younger than sediment OSL age. This study indicates that mathematical modeling could not always give convincing results for the open-air sites, which may experience dramatic hydrological variations and high erosion rates. |
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| Keywords: | ESR/U-series method Fossil teeth Uranium migration model Donggutuo site Hougou site |
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