SAR TT-OSL dating of the loess deposits in the Horqin dunefield (northeastern China) |
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| Institution: | 1. School of Geographic and Oceanographic Sciences, Institute for Climate and Global Change Research, Nanjing University, No.22, Hankou Road, Nanjing 210093, PR China;2. Centre for Quaternary Research, Department of Geography, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK;3. Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovi?a 3, 21000 Novi Sad, Serbia;1. MOE Key Laboratory of Western China''s Environmental Systems, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, PR China;2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710075, PR China;3. Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, PR China;1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China;2. Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, Ceredigion SY23 3DB, UK;3. Chinese Academy of Geological Sciences, Beijing 100037, China;1. Key Laboratory of Salt Lake Geology and Environment of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;2. SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710075, China;3. School of Earth Sciences, China University of Geosciences, Wuhan 430074, China;4. College of Biology and Geography, Qinghai Normal University, Xining 810008, China;5. College of Resources and Environment, Linyi University, Linyi 276000, China;6. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Palaeoclimatic change in northeastern China during the late Quaternary remains poorly understood. This is partly because of the scarcity of detailed investigations into archives in the region, but especially because of the lack of an appropriate dating method to obtain age control for the area's loess deposits. In this paper, the single-aliquot regenerative-dose (SAR) OSL and thermally transferred OSL (TT-OSL) method have been used to date two typical loess sections (Kulungou and Pingancun) in northeastern China. The results show that the SAR TT-OSL method is suitable for dating the Horqin aeolian sections and suggest that deposition commenced at least since the middle Pleistocene in the Horqin dunefield. A sand layer deposited at about 262 ± 32 ka implies that the dunefield experienced at least one significant period of aridification during the late Quaternary. |
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