干旱区生态环境知识资源中心(Arid): End-member modeling of the grain size record of loess in the Mu Us Desert and implications for dust sources

Arid

DOI	10.1016/j.quaint.2019.10.005
	End-member modeling of the grain size record of loess in the Mu Us Desert and implications for dust sources
	Wen, Yanglei 1,2,3; Wu, Yongqiu 1,2,3; Tan, Lihua 1,2,3; Li, Dawei 1,2,3; Fu, Tianyang 1,2,3
通讯作者	Wu, Yongqiu
来源期刊	QUATERNARY INTERNATIONAL
ISSN	1040-6182
EISSN	1873-4553
出版年	2019
卷号	532 页码:87-97
英文摘要	The arid and semiarid northern region of China is the most important loess region in the world. In this region, loess records from the Chinese Loess Plateau (CLP) have been studied extensively, but they are often underrepresented in sedimentological-palaeoenvironmental studies dealing with sites in the Mu Us Desert. Thus, the dust sources and sedimentary characteristics of loess in the Mu Us Desert are poorly understood. To address this, 9 loess sections and 44 modern surface samples with different sediment types in the Mu Us Desert are analyzed to determine their grain size distributions. The grain size dataset is subdivided into three end-members (EMs) using EM modeling, and the EM modeling results of loess and surface sediments are compared. Through the above work, we obtain the following information. (1) The modes of EM1, EM2 and EM3 are 16 mu m 70 mu m and 234 mu m respectively, thus representing different transport processes from different dust sources. Among them, EM1 represents long-term suspension from distant sources, EM2 represents short-term suspension and saltation driven by dust storms from local sources, and EM3 represents saltation with shorter transport distance than EM2. (2) From northwest to southeast, the content of loess in EM1, EM2 and EM3 shows a gradual decreasing trend, a gradual increasing trend, and a gradual increasing or irregular trend, respectively. This spatial distribution indicates that although the winter monsoon is the main driving force for loess materials, it is not the main controlling factor of the loess grain size. The loess grain size of the Mu Us Desert is greatly affected by the dust sources. (3) The dust sources of loess in the Mu Us Desert are complex. In addition to the common dust sources with the CLP loess, there are also the contributions of local loose sediments, such as alluvial-lacustrine sediments, floodplain sediments and dune sands from the Mu Us Desert.
英文关键词	Mu Us Desert Loess Grain size End-member modeling Dust source
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000502533000008
WOS关键词	YELLOW-RIVER ; PALEOSOL SEQUENCE ; LATE PLEISTOCENE ; TIBETAN PLATEAU ; CHINA ; PATTERNS ; DEPOSITS ; ACCUMULATION ; VARIABILITY ; MARGIN
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
EI主题词	2019-11-10
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310809
作者单位	1.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China; 2.Beijing Normal Univ, MOE Engn Ctr Desertificat & Blown Sand Control, Beijing 100875, Peoples R China; 3.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Wen, Yanglei,Wu, Yongqiu,Tan, Lihua,et al. End-member modeling of the grain size record of loess in the Mu Us Desert and implications for dust sources[J]. 北京师范大学,2019,532:87-97.
APA	Wen, Yanglei,Wu, Yongqiu,Tan, Lihua,Li, Dawei,&Fu, Tianyang.(2019).End-member modeling of the grain size record of loess in the Mu Us Desert and implications for dust sources.QUATERNARY INTERNATIONAL,532,87-97.
MLA	Wen, Yanglei,et al."End-member modeling of the grain size record of loess in the Mu Us Desert and implications for dust sources".QUATERNARY INTERNATIONAL 532(2019):87-97.