干旱区生态环境知识资源中心(Arid): Geochemical weathering of aeolian sand and its palaeoclimatic implications in the Mu Us Desert, northern China, since the Late Holocene

Arid

	Geochemical weathering of aeolian sand and its palaeoclimatic implications in the Mu Us Desert, northern China, since the Late Holocene
	Liu Bing; Jin Heling; Sun Zhong; Zhao Shuang
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2016
卷号	8 期号:5 页码:647-659
英文摘要	In the semi-arid and arid regions of northern China, geochemical behavior of the aeolian deposit is closely related to climatic and environmental changes, which was used to reconstruct the past history of environmental evolution and possibly forcing mechanisms. However, the related result was still scarce due to the lack of detailed geochemical analysis results in the desert sediments. In the present study, we systematically analyzed the geochemical components and parameters of the paleo-aeolian sand dune and modern mobile sand deposits in the Mu Us Desert and discuss the climatic variation inferred from the paleo-aeolian sand dune during the past 4.2 ka BP. The results indicated that (1) geochemical composition of the sandy deposits were dominated by SiO_2, Al_2O_3 and Na_2O and the deposits probably originated from the widespread upper continental crust (UCC) and were formed by long-term weathering, transport and re-deposition; (2) these sandy deposits were subjected to weaker weathering or uneven weathering under cold and dry conditions, and had highly similar material sources and degrees of weathering and leaching in general; and (3) the direct OSL (Optically Stimulated Luminescence) dating ages and geochemical parameters from the palaeosol-aeolian sand dune indicated that the regional climate change experienced several typically cold and warm intervals. These intervals are 4.2, 2.8 ka BP and Little Ice Age and Medieval Warm Period, which probably attributed to periodic variations of the Asian summer monsoonal strength and cold events of the northern Atlantic Ocean in low and high latitudes of the Northern Hemisphere. Our results suggest that the development of the sand dune in the Mu Us Desert provided a suitable archive for understanding the past local climatic change, which is linked to the global climatic change.
英文关键词	climatic change geochemical component weathering degree Late Holocene Mu Us Desert
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	History
CSCD记录号	CSCD:5755831
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335682
作者单位	Liu Bing, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology;;Key Laboratory of Desert and Desertification Chinese Academy of Sciences;;Key Laboratory of Western China's Environmental System (Ministry of Education), Beijing 100875, China.; Jin Heling, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology;;Key Laboratory of Desert and Desertification Chinese Academy of Sciences, Beijing 100875, China.; Sun Zhong, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Key Laboratory of Desert and Desertification Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Zhao Shuang, Lanzhou University, Key Laboratory of Western China's Environmental System (Ministry of Education), Lanzhou, Gansu 730000, China.
推荐引用方式 GB/T 7714	Liu Bing,Jin Heling,Sun Zhong,et al. Geochemical weathering of aeolian sand and its palaeoclimatic implications in the Mu Us Desert, northern China, since the Late Holocene[J],2016,8(5):647-659.
APA	Liu Bing,Jin Heling,Sun Zhong,&Zhao Shuang.(2016).Geochemical weathering of aeolian sand and its palaeoclimatic implications in the Mu Us Desert, northern China, since the Late Holocene.Journal of Arid Land,8(5),647-659.
MLA	Liu Bing,et al."Geochemical weathering of aeolian sand and its palaeoclimatic implications in the Mu Us Desert, northern China, since the Late Holocene".Journal of Arid Land 8.5(2016):647-659.