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题名: Holocene environment changes around the Sara Us River, northern China, revealed by optical dating of lacustrine-aeolian sediments
作者: Zhao, H; Sheng, YW; Li, B; Fan, YX
收录类别: SCIE
出版日期: 2016-04-15
刊名: JOURNAL OF ASIAN EARTH SCIENCES
卷号: 120, 页码:184-191
出版者: ELSEVIER
出版地: OXFORD
英文摘要: The Sara Us River is located along the boundary of the Mu Us Desert and the Chinese Loess Plateau in northern China. The river has cut down through Quaternary sediments creating 70-80 m deep valleys with thick lacustrine/aeolian sequences exposed. We applied optical stimulated luminescence on sediments from a Holocene section of aeolian sand/lacustrine deposits in the top of the river valley. The dating results show that a humid period existed from 7.1 to 2.0 ka ago as evidenced by two layers of peat and lacustrine sediments. However, compared to other published Holocene sections in the Sara Us River valleys close to the section under studying, the local environment experienced very complicated changes during the Holocene. All of the sections recorded a period with drought and/or cold before the Holocene at around 13 ka, and an episode of aridity after about 2 ka ago as evidenced by the layers of aeolian sand. However, the ages of the lacustrine and peat layers in these sections are substantially different. Geomorphological analysis by digital elevation models does not support the existence of a mega lake covering the study area at 2 ka. The intricate environmental changes may have been caused by the meandering of the Sara Us River. Environmental changes also strongly affected human migration in this area, which is documented by Chinese historical records. (C) 2016 Elsevier Ltd. All rights reserved.
关键词: Environment changes ; Late Holocene ; OSL dating ; Sara Us River
作者部门: [Zhao, Hui] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China ; [Sheng, Yongwei] Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90095 USA ; [Li, Bo] Univ Wollongong, Sch Earth & Environm Sci, Ctr Archaeol Sci, Wollongong, NSW 2522, Australia ; [Fan, Yuxin] Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China ; [Fan, Yuxin] Lanzhou Univ, Key Lab Mineral Resources Western China, Lanzhou 730000, Peoples R China
通讯作者: Zhao, H (reprint author), Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China.
学科分类: Geology
文章类型: Article
所属项目编号: National Natural Science Foundation of China [41272190] ; one hundred talents project of CAS, University of Wollongong Vice Chancellor's Postdoctoral Research Fellowship
所属项目名称: 国家自然科学基金项目
项目资助者: NSFC
语种: 英语
DOI: 10.1016/j.jseaes.2016.02.002
ISSN号: 1367-9120
WOS记录号: WOS:000378455500012
IR记录号: WOS:000378455500012
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/179680
Appears in Collections:地质科学与矿产资源学院_期刊论文

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Recommended Citation:
Zhao, H,Sheng, YW,Li, B,et al. Holocene environment changes around the Sara Us River, northern China, revealed by optical dating of lacustrine-aeolian sediments[J]. JOURNAL OF ASIAN EARTH SCIENCES,2016,120:184-191.
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