干旱区生态环境知识资源中心(Arid): Sedimentological and geochemical characteristics of sediments and their potential correlations to the processes of desertification along the Keriya River in the Taklamakan Desert, western China

Arid

DOI	10.1016/j.geomorph.2020.107560
	Sedimentological and geochemical characteristics of sediments and their potential correlations to the processes of desertification along the Keriya River in the Taklamakan Desert, western China
	Zhou, Ye; Yang, Xiaoping; Zhang, Deguo; Mackenzie, Lydia Lattin; Chen, Bo
通讯作者	Yang, XP (corresponding author), Zhejiang Univ, Sch Earth Sci, Key Lab Geosci Big Data & Deep Resource Zhejiang, Hangzhou 310027, Peoples R China.
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2021
卷号	375
英文摘要	Desertification is a key environmental concern in arid and semi-arid regions. The sedimentological and geochemical characteristics of sediments are closely related to desertification processes, but the relationship between them is still unclear. This study aimed to identify the sedimentological and geochemical characteristics of different sediments in the Taklamakan Desert and to monitor changes in sediment composition as the intensity of desertification varied in the last decades. We examined the grain size, major, trace and rare earth elements of surface sediments collected from loess, sandy loess, fluvial sands, vegetated dunes and mobile dunes along the Keriya River in the Taklamakan Desert. Major element analysis found that loess had the highest degree of chemical weathering, while weathering of surface sediments on dunes (both mobile and vegetated ones) was relatively weak. Trace and rare earth element analysis found sediments were mainly derived from the West Kunlun and West Tianshan Mountains. This study also analyzed vegetation and wind data from 2000 to 2018 and found that the intensity of desertification processes weakened. The near-surface mean wind speed also decreased from 2000 to 2018, resulting in an increase in both the grain size of aeolian sediments on the surface of mobile dunes and the degree of chemical weathering. Additionally, this study confirmed that clay-sized components can be carried by high-altitude westerlies or formed by pedogenesis. With the strengthening of westerlies and the increase of chemical weathering, it is likely that more clay components will be added to the loess located on the northern slope of the Kunlun Mountains. This study demonstrates that the landscape evolution of the Keriya River in the Taklamakan Desert is primarily driven by fluvial processes, vegetation and wind dynamics, and that these processes may be affected by the intensity of desertification. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Aeolian sand Grain size Geochemical component Surface process NDVI
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000612686900005
WOS关键词	GRAIN-SIZE CHARACTERISTICS ; RARE-EARTH-ELEMENTS ; MU US DESERT ; LAND DEGRADATION ; TARIM BASIN ; SAND DUNES ; FINE ; DEPOSITS ; PROVENANCE ; LOESS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350408
作者单位	[Zhou, Ye; Yang, Xiaoping; Zhang, Deguo; Mackenzie, Lydia Lattin; Chen, Bo] Zhejiang Univ, Sch Earth Sci, Key Lab Geosci Big Data & Deep Resource Zhejiang, Hangzhou 310027, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Ye,Yang, Xiaoping,Zhang, Deguo,et al. Sedimentological and geochemical characteristics of sediments and their potential correlations to the processes of desertification along the Keriya River in the Taklamakan Desert, western China[J],2021,375.
APA	Zhou, Ye,Yang, Xiaoping,Zhang, Deguo,Mackenzie, Lydia Lattin,&Chen, Bo.(2021).Sedimentological and geochemical characteristics of sediments and their potential correlations to the processes of desertification along the Keriya River in the Taklamakan Desert, western China.GEOMORPHOLOGY,375.
MLA	Zhou, Ye,et al."Sedimentological and geochemical characteristics of sediments and their potential correlations to the processes of desertification along the Keriya River in the Taklamakan Desert, western China".GEOMORPHOLOGY 375(2021).