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

文献类型：期刊论文

作者Zhou, Jie3,5,6; Zhou, Weijian1,4,6,7; Dong, Guocheng3,6; Hou, Yaoyao3,6; Xian, Feng1,3,6; Zhang, Li3,6; Tang, Ling3,6; Zhao, Guoqing3,6; Fu, Yunchong2,3,6
刊名QUATERNARY SCIENCE REVIEWS
出版日期2020-03-01
卷号231页码:14
关键词Lake terrace Be-10-Al-26 exposure dating Tibetan Plateau Nam Co Lake-level fluctuations MIS 5
ISSN号0277-3791
DOI10.1016/j.quascirev.2020.106175
通讯作者Zhou, Weijian(weijian@loess.llqg.ac.cn)
英文摘要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.
WOS关键词LAST GLACIAL MAXIMUM ; QINGHAI LAKE ; SUMMER MONSOON ; NYAINQENTANGLHA MOUNTAINS ; LEVEL CHANGES ; TANGRA YUMCO ; RECONSTRUCTION ; EVOLUTION ; NUCLIDE ; CHINA
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
语种英语
WOS记录号WOS:000519667900008
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构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
源URL[http://ir.ieecas.cn/handle/361006/12662]  
专题地球环境研究所_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.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Ocean Continental Climate & Environm, Qingdao 266061, Peoples R China
2.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
3.Xian AMS Ctr, Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian 710061, Peoples R China
4.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
7.Beijing Normal Univ, Interdisciplinary Res Ctr Earth Sci Frontier, Beijing 100875, 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.

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来源：地球环境研究所

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