气候变化领域集成服务门户(CCPortal): Geochemical evidence for provenance diversity of loess in southern China and its implications for glacial aridification of the northern subtropical region

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DOI	10.1016/j.quascirev.2019.04.002
	Geochemical evidence for provenance diversity of loess in southern China and its implications for glacial aridification of the northern subtropical region
	Han L.; Hao Q.; Qiao Y.; Wang L.; Peng S.; Li N.; Gao X.; Fu Y.; Xu B.; Gu Z.
发表日期	2019
ISSN	0277-3791
起始页码	149
结束页码	163
卷号	212
英文摘要	The thick ‘Xiashu loess’ in southern China is distributed not only in the Yangtze River valley, but also and most extensively in the region between the Qinling Mountains and the lower reaches of the Yangtze River. However, there are few studies of the provenance and climatic implications of the Xiashu loess in this latter region. Here we present the results of a provenance study of Last Glacial loess samples from twenty-two typical Xiashu loess sections, using the major and trace element composition as a provenance indicator. Seventeen of the sites are located to the north of the Yangtze River and our primary aim was to determine the provenance of the Xiashu loess within this region. Our results indicate that the alluvial plain located mainly in the present drainage area of the Huai River was the primary dust source for the Xiashu loess in this region. The occurrence of multiple local dust sources within this alluvial plain, suggested by their geochemical heterogeneity, indicates that the alluvial plain experienced intensified aridity which caused it to become a dust source for local loess deposits in northern subtropical China during the Last Glacial. Our study provides strong evidence to challenge the long-held view that the occurrence of Xiashu loess resulted from the southward incursion of the CLP loess deposits sourced from deserts of the Asian interior, and it confirms the substantial role of aridification of the present humid northern subtropical region for dust emission to the climate system during the Last Glacial. © 2019 Elsevier Ltd
英文关键词	Alluvial plain; Aridification; Geochemistry; Huai river; Last glacial period; Provenance; Xiashu loess; Yangtze river
语种	英语
scopus关键词	Arid regions; Deposits; Dust; Geochemistry; Glacial geology; Landforms; Rivers; Trace elements; Tropics; Alluvial plains; Aridification; Huai rivers; Last glacial period; Provenance; Xiashu loess; Yangtze River; Sediments; alluvial plain; aridification; aridity; geochemistry; Last Glacial; loess; provenance; subtropical region; trace element; China; Huai River; Qinling Mountains; Yangtze River; Yangtze Valley
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/151943
作者单位	Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Beijing, 100044, China; Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing, 100081, China; Institutions of Earth Science, Chinese Academy of Sciences, Beijing, 100029, China; Key Laboratory of Tourism and Resources Environment in Universities of Shandong, Taishan University, Taian, 271021, China; School of Earth and Space Sciences, Peking University, Beijing, 100871, China
推荐引用方式 GB/T 7714	Han L.,Hao Q.,Qiao Y.,et al. Geochemical evidence for provenance diversity of loess in southern China and its implications for glacial aridification of the northern subtropical region[J],2019,212.
APA	Han L..,Hao Q..,Qiao Y..,Wang L..,Peng S..,...&Gu Z..(2019).Geochemical evidence for provenance diversity of loess in southern China and its implications for glacial aridification of the northern subtropical region.Quaternary Science Reviews,212.
MLA	Han L.,et al."Geochemical evidence for provenance diversity of loess in southern China and its implications for glacial aridification of the northern subtropical region".Quaternary Science Reviews 212(2019).