气候变化领域集成服务门户(CCPortal): Origin of loess deposits in the North Tian Shan piedmont; Central Asia

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DOI	10.1016/j.palaeo.2020.109972
	Origin of loess deposits in the North Tian Shan piedmont; Central Asia
	Li Y.; Song Y.; Fitzsimmons K.E.; Chen X.; Prud'homme C.; Zong X.
发表日期	2020
ISSN	0031-0182
卷号	559
英文摘要	Loess deposits are widely distributed along the mountain piedmonts of Central Asia. The transport processes and origins of Central Asian loess sediments remain poorly understood. Here we investigate the origin and formation of loess along the northern piedmont of the Tian Shan based on trace element (including rare earth element) ratios and multidimensional scaling analysis. Our results indicate that the loess has undergone weak chemical weathering. Using a selection of geochemical fingerprinting techniques based on Pearson correlation and Kruskal–Wallis H tests, we establish a genetic link between alluvial-proluvial fans/plains, deserts, and loess along the Tian Shan piedmont in northern Kyrgyzstan and southern Kazakhstan. The unsorted sediments on the piedmont slopes and alluvial-proluvial plains are common sources for both deserts and loess to the north of the Tian Shan. Dune sediments are not the main source of the fine-grained loess. Origin and formation of Central Asian loess is strongly dependent on local topographic context and wind dynamics. Only once loess provenance and formation has been understood across both space and time can reliable interpretations of palaeoclimatic proxies in these deposits be made. © 2020 Elsevier B.V.
英文关键词	Fingerprinting technique; Loess; Palaeoclimatic reconstruction; Tian Shan; Trace element geochemistry
语种	英语
scopus关键词	chemical weathering; loess; paleoclimate; piedmont; provenance; sediment transport; trace element; Central Asia; Kazakhstan; Kyrgyzstan; Tien Shan
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150328
作者单位	State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Research Group for Terrestrial Palaeoclimates, Max Planck Institute for Chemistry, Mainz, 55128, Germany; CAS Center for Excellence in Quaternary Science and Global Change, Xi'An, 710061, China; Institute of Geography, Fujian Normal University, Fuzhou, 350007, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi, 830011, China
推荐引用方式 GB/T 7714	Li Y.,Song Y.,Fitzsimmons K.E.,et al. Origin of loess deposits in the North Tian Shan piedmont; Central Asia[J],2020,559.
APA	Li Y.,Song Y.,Fitzsimmons K.E.,Chen X.,Prud'homme C.,&Zong X..(2020).Origin of loess deposits in the North Tian Shan piedmont; Central Asia.Palaeogeography, Palaeoclimatology, Palaeoecology,559.
MLA	Li Y.,et al."Origin of loess deposits in the North Tian Shan piedmont; Central Asia".Palaeogeography, Palaeoclimatology, Palaeoecology 559(2020).