干旱区生态环境知识资源中心(Arid): Environmental Significance of the Chemical Composition of Sediments in Groundwater-Recharged Lakes of the Badain Jaran Desert, NW China

Arid

DOI	10.1029/2018GC007967
	Environmental Significance of the Chemical Composition of Sediments in Groundwater-Recharged Lakes of the Badain Jaran Desert, NW China
	Li, Zhuolun 1,2; Chen, Qiujie 1; Zhang, Cheng 1; Yu, Qiangjing 1; Dong, Shipei 1; Zhao, Liqiang 1; Wang, Nai’ang 1
通讯作者	Li, Zhuolun
来源期刊	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
EISSN	1525-2027
出版年	2019
卷号	20 期号:2 页码:1026-1040
英文摘要	For lakes in desert hinterlands that are not recharged by river runoff, sediment is input solely by wind transport; however, the mechanisms that control the spatial variations in geochemical characteristics of sediments in such lakes remain unclear. Moreover, it remains uncertain whether some element ratios can be used as proxies for environmental characteristics. In this study, 100 surface sediment samples were collected from five lakes in the hinterland of the Badain Jaran Desert, NW China, and examined for their major, trace and rare earth element contents and mineral assemblages. Chemical composition and mineral components of the sediments differed significantly between lakes with different total dissolved solids (TDS). Geochemical characteristics of the lake sediments and their spatial variations are influenced by eolian sands, saline minerals, and sediment sorting. Eolian sands dominate the immobile and nonsoluble elements, whereas authigenic minerals are important in influencing variations in the mobile and soluble elements. Sediment sorting is reflected in the spatial variation of the sediment chemical composition. The positive relationship between the SiO2/Ti of sediment and lake area indicates that changes in the SiO2/Ti ratio can reveal approximate lake area. The Na2O/K2O ratio in sediments can reveal the TDS of salt lakes more effectively than can the Rb/Sr ratio. However, the key factors and mechanisms governing the chemical composition of sediments at different brine evolution stages vary among lakes with different TDS levels, which should be carefully considered when interpreting the environmental significance of the chemical composition as a proxy for paleoenviroment change.
英文关键词	lake sediment geochemistry rare earth element groundwater-recharged lakes hyperarid region sand sea
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000461745200026
WOS关键词	RARE-EARTH-ELEMENT ; GRAIN-SIZE DEPENDENCE ; ASIAN MONSOON MARGIN ; LACUSTRINE SEDIMENTS ; TIBETAN PLATEAU ; DEPOSITIONAL PROCESSES ; WEATHERING INTENSITY ; HOLOCENE CLIMATE ; BARKOL LAKE ; THAR DESERT
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215900
作者单位	1.Lanzhou Univ, Coll Earth & Environm Sci, Ctr Glacier & Desert Res, Lanzhou, Gansu, Peoples R China; 2.Shandong Univ Sci & Technol, Shandong Prov Key Lab Deposit Mineralizat & Sedim, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhuolun,Chen, Qiujie,Zhang, Cheng,et al. Environmental Significance of the Chemical Composition of Sediments in Groundwater-Recharged Lakes of the Badain Jaran Desert, NW China[J]. 兰州大学,2019,20(2):1026-1040.
APA	Li, Zhuolun.,Chen, Qiujie.,Zhang, Cheng.,Yu, Qiangjing.,Dong, Shipei.,...&Wang, Nai’ang.(2019).Environmental Significance of the Chemical Composition of Sediments in Groundwater-Recharged Lakes of the Badain Jaran Desert, NW China.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,20(2),1026-1040.
MLA	Li, Zhuolun,et al."Environmental Significance of the Chemical Composition of Sediments in Groundwater-Recharged Lakes of the Badain Jaran Desert, NW China".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 20.2(2019):1026-1040.