Cosmogenic Be-10 and Al-26 exposure dating of Nam Co lake terraces since MIS 5, southern Tibetan Plateau

doi:10.1016/j.quascirev.2020.106175

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	Cosmogenic Be-10 and Al-26 exposure dating of Nam Co lake terraces since MIS 5, southern Tibetan Plateau
	Zhou, Jie 1,2,4; Zhou, Weijian 1,3,6,7; Dong, Guocheng 1,4; Hou, Yaoyao 1,4; Xian, Feng 1,4,7; Zhang, Li 1,4; Tang, Ling 1,4; Zhao, Guoqing 1,4; Fu, Yunchong1,4,5
通讯作者	Zhou, Weijian(weijian@loess.llqg.ac.cn)
	2020-03-01
发表期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
卷号	231 页码:14
摘要	Lake paleo-shorelines can be used to reconstruct lake level fluctuations, which serve as sensitive indicators of climate change. The Tibetan Plateau (TP) contains the highest areal proportion of lakes in China, and dramatic past lake level changes have led to the formation of numerous relict shorelines. Here, we present 24 Be-10 and Al-26 exposure-ages for five of seven lake terraces situated north of Nam Co, on the southern TP. The ages of four high stands marked by terraces (T7, T6, T 5, and T4) are 81.5 +/- 9.0 ka, 33.6 +/- 1.9 ka, 19.9 +/- 1.9 ka, and 15.2 +/- 0.4 ka. The topographically highest terrace, T7, correlates with periods of enhanced Indian summer monsoon (ISM) and supports an MIS 5 maximum lake expansion on the TP, as opposed to MIS 3. Ages of two lower terraces (T5 and T4) possibly correspond to Melt Water Pulse (MWP) events. We also evaluate different possible sources of uncertainty from geologic processes on Be-10 exposure ages of lake terraces. Subaerial erosion following terrace exposure has the most significant influence on Be-10 exposure ages on ancient high terraces (for example > 80 ka), while inherited Be-10 from prior exposure and partial shielding by shallow water, beach or talus are the most important geological source error of Be-10 exposure ages for relatively low and young terraces (for example < 15 ka). (C) 2020 Elsevier Ltd. All rights reserved.
关键词	Lake terrace Be-10-Al-26 exposure dating Tibetan Plateau Nam Co Lake-level fluctuations MIS 5
DOI	10.1016/j.quascirev.2020.106175
关键词[WOS]	LAST GLACIAL MAXIMUM ; QINGHAI LAKE ; SUMMER MONSOON ; NYAINQENTANGLHA MOUNTAINS ; LEVEL CHANGES ; TANGRA YUMCO ; RECONSTRUCTION ; EVOLUTION ; NUCLIDE ; CHINA
收录类别	SCI ; SCI
语种	英语
资助项目	Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-DQC010] ; Chinese Academy of Sciences[132B61KYSB20170005] ; National Natural Science Foundation of China[41930321] ; National Natural Science Foundation of China[41602195] ; National Natural Science Foundation of China[11975240] ; CAS Light of West China Program[XAB2016A01] ; MOST special fund for State Key Laboratory of Loess and Quaternary Geology
WOS研究方向	Physical Geography ; Geology
项目资助者	Key Research Program of Frontier Sciences, CAS ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; CAS Light of West China Program ; MOST special fund for State Key Laboratory of Loess and Quaternary Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000519667900008
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/12663
专题	加速器质谱中心第四纪科学与全球变化卓越创新中心
通讯作者	Zhou, Weijian
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 4.Xian AMS Ctr, Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian 710061, Peoples R China 5.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China 6.Beijing Normal Univ, Interdisciplinary Res Ctr Earth Sci Frontier, Beijing 100875, Peoples R China 7.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Ocean Continental Climate & Environm, Qingdao 266061, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Jie,Zhou, Weijian,Dong, Guocheng,et al. Cosmogenic Be-10 and Al-26 exposure dating of Nam Co lake terraces since MIS 5, southern Tibetan Plateau[J]. QUATERNARY SCIENCE REVIEWS,2020,231:14.
APA	Zhou, Jie.,Zhou, Weijian.,Dong, Guocheng.,Hou, Yaoyao.,Xian, Feng.,...&Fu, Yunchong.(2020).Cosmogenic Be-10 and Al-26 exposure dating of Nam Co lake terraces since MIS 5, southern Tibetan Plateau.QUATERNARY SCIENCE REVIEWS,231,14.
MLA	Zhou, Jie,et al."Cosmogenic Be-10 and Al-26 exposure dating of Nam Co lake terraces since MIS 5, southern Tibetan Plateau".QUATERNARY SCIENCE REVIEWS 231(2020):14.