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DOI	10.1016/j.quascirev.2020.106175
	Cosmogenic 10Be and 26Al exposure dating of Nam Co lake terraces since MIS 5; southern Tibetan Plateau
	Zhou J.; Zhou W.; Dong G.; Hou Y.; Xian F.; Zhang L.; Tang L.; Zhao G.; Fu Y.
发表日期	2020
ISSN	0277-3791
卷号	231
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 10Be and 26Al 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, T5, 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 10Be exposure ages of lake terraces. Subaerial erosion following terrace exposure has the most significant influence on 10Be exposure ages on ancient high terraces (for example > 80 ka), while inherited 10Be from prior exposure and partial shielding by shallow water, beach or talus are the most important geological source error of 10Be exposure ages for relatively low and young terraces (for example < 15 ka). © 2020 Elsevier Ltd
英文关键词	10Be–26Al exposure dating; Lake terrace; Lake-level fluctuations; MIS 5; Nam Co; Tibetan Plateau
语种	英语
scopus关键词	Climate change; Geologic process; Indian summer monsoon; Lake level changes; Lake level fluctuations; Sensitive indicator; Shallow waters; Sources of uncertainty; Tibetan Plateau; Lakes; aluminum; beryllium isotope; cosmogenic radionuclide; dating method; lake level; marine isotope stage; pollution exposure; terrace; China; Nam Co; Qinghai-Xizang Plateau; Xizang
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151574
作者单位	State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi'an, 710061, China; Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an AMS Center, Xi'an, 710061, China; Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, 710049, China; Interdisciplinary Research Center of Earth Science Frontier, Beijing Normal University, Beijing, 100875, China; Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266061, China
推荐引用方式 GB/T 7714	Zhou J.,Zhou W.,Dong G.,et al. Cosmogenic 10Be and 26Al exposure dating of Nam Co lake terraces since MIS 5; southern Tibetan Plateau[J],2020,231.
APA	Zhou J..,Zhou W..,Dong G..,Hou Y..,Xian F..,...&Fu Y..(2020).Cosmogenic 10Be and 26Al exposure dating of Nam Co lake terraces since MIS 5; southern Tibetan Plateau.Quaternary Science Reviews,231.
MLA	Zhou J.,et al."Cosmogenic 10Be and 26Al exposure dating of Nam Co lake terraces since MIS 5; southern Tibetan Plateau".Quaternary Science Reviews 231(2020).