Late Quaternary climate and environmental change derived from glacial deposits in the Parlung Zangbo Valley,southeastern Tibetan Plateau |
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| Authors: | Renrong Chen Yingkui Li Zhongping Lai Xianjiao Ou Xiaoyu Lu |
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| Institution: | 1. School of Geography and Tourism, Jiaying University, Meizhou, China;2. School of Geography Science, South China Normal University, Guangzhou, China;3. Department of Geography, University of Tennessee, Knoxville, TN, USA;4. Department of Geography, University of Tennessee, Knoxville, TN, USA;5. Institute of Marine Science, Shantou University, Shantou, China;6. Department of Geography and Earth Sciences, Aberystwyth University, Ceredigion, UK https://orcid.org/0000-0003-2776-1099 |
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| Abstract: | ABSTRACTThis study investigated the late Quaternary climate and environmental characteristics of two tributary valleys (Xingmu and Depu Valleys) in the Parlung Zangbo Valley, southeastern Tibetan Plateau. Optically stimulated luminescence (OSL) samples collected from moraines at the mouth of Xingmu Valley produce a wide age range from 13.9 ka to 76 ka. The ages measured from the lenticular sand are consistent with the relative geomorphic sequence of the landforms. Lenticular sand layers below the moraine were dated to 37.9 ka and 44.7 ka, indicating that fluvial processes were likely dominant in the valley during Marine Isotope Stage (MIS) 3. The outer moraine ridges at the valley mouth were formed during 13.9 ka and 26.5 ka, corresponding to MIS2. At Depu Valley, OSL samples from two sets of lateral and terminal moraines close to the modern glacier, provide ages from 1.4 ka to 29.2 ka. The paleosol layer widely developed during 2.6 cal ka BP and 8.7 cal ka BP in the study area, reflecting a relatively warm condition during the mid-Holocene. |
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| Keywords: | Glacial landforms OSL dating late Quaternary climate change southeastern Tibetan Plateau |
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https://orcid.org/0000-0003-2776-1099