Late Quaternary glaciation of the Tianshan, Central Asia, using cosmogenic Be surface exposure dating |
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| Authors: | Ping Kong David Fink Chunguang Na Feixin Huang |
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| Institution: | aKey Laboratory of the Earth's Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing 100029, China;bInstitute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China;cInstitute for Environmental Research, Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australia |
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| Abstract: | Glacial deposits are present at the head of the Ürümqi River valley, Tianshan, Central Asia. 10Be surface exposure ages of 15 boulders from three sites along a 12 km valley transect range from 9 to 21 ka suggesting emplacement by glacial retreat and advance commencing at the global last glacial maximum (LGM) and most likely abating in the early Holocene. Although the age spread for a given locality is not small, perhaps indicating post-depositional reworking, maximum ages per site are either coeval with or are post-LGM and inconsistent with previous pre-LGM electron spin resonance ages. |
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| Keywords: | Tianshan Exposure age Ü rü mqi River valley Glaciation Cosmogenic nuclide Last glacial maximum |
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