干旱区生态环境知识资源中心(Arid): Composition,origin and weathering process of surface sediment in Kumtagh Desert,Northwest China

Arid

	Composition,origin and weathering process of surface sediment in Kumtagh Desert,Northwest China
	Xu Zhiwei; Lu Huayu; Zhao Cunfa; Wang Xianyan; Su Zhizhu; Wang Zhenting; Liu Hongyi; Wang Lixin; Lu Qi
来源期刊	Journal of Geographical Sciences
ISSN	1009-637X
出版年	2011
卷号	21 期号:6 页码:1062-1076
英文摘要	Kumtagh Desert is one of the eight biggest deserts in China,but poorly investigated before our interdisciplinary study because of the difficulty of access.In this paper,33 representative surface sediment samples were collected from the Kumtagh Desert and analyzed in the laboratory to obtain heavy mineral components and geochemical element contents.Results show that various kinds of heavy minerals are present in these samples,with high levels of epidote and hornblende.Si and Al take up a large part of chemical composition.Compared with the average composition of geochemical elements of the upper continental crust(UCC),except Si and Ca,all elements are depleted to a certain degree;Fe,Mg,Ca,P,Ti and Mn have high correlation coefficients in their contents.The mineral and geochemical composition of the Kumtagh Desert sediments have a similarity with that of rocks of Altyn Tagh Mountains,and the surface sediments of the alluvial/diluvial fans around the Altyn Tagh Mountains and that of the Taklamakan Desert,indicating that one major source of the Kumtagh Desert sediments is located in the Altyn Tagh Mountains.Alluvial deposits and lake sediments in Aqik valley and lower reaches of Shule River are prone to be eroded and transported by the strong northeasterly wind into the Kumtagh Desert,forming another source of the desert deposits.An A-CN-K ternary diagram shows that a weak degree chemical weathering by the loss of Na and K occurred in these sediments,whereas A-CNK-FM ternary diagram suggests that Fe and Mg have undergone a significant chemical differentiation.Physical weathering processes cause easy erosion and enrichment in fine particles for mafic minerals,thus coarse desert sand particles can be relatively depleted in Fe and Mg.The mineral and geochemical composition of sediments in arid regions experiencing less chemical weathering are mostly affected by physical weathering.
英文关键词	minerals geochemical elements sediment provenance weathering process Kumtagh Desert
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Geology
CSCD记录号	CSCD:4323566
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335108
作者单位	Xu Zhiwei, School of Geographic and Oceanographic Sciences,Nanjing University, the MOE Key Laboratory of Coast and Island Development, Nanjing, Jiangsu 210093, China.; Lu Huayu, School of Geographic and Oceanographic Sciences,Nanjing University, the MOE Key Laboratory of Coast and Island Development, Nanjing, Jiangsu 210093, China.; Zhao Cunfa, School of Geographic and Oceanographic Sciences,Nanjing University, the MOE Key Laboratory of Coast and Island Development, Nanjing, Jiangsu 210093, China.; Wang Xianyan, School of Geographic and Oceanographic Sciences,Nanjing University, the MOE Key Laboratory of Coast and Island Development, Nanjing, Jiangsu 210093, China.; Wang Lixin, School of Geographic and Oceanographic Sciences,Nanjing University, the MOE Key Laboratory of Coast and Island Development, Nanjing, Jiangsu 210093, China.; Su Zhizhu, Institute of Desertification Studies,Chinese Academy of Forestry, Beijing 100091, China.; Lu Qi, Institute of Desertification Studies,Chinese Academy of Forestry, Be...
推荐引用方式 GB/T 7714	Xu Zhiwei,Lu Huayu,Zhao Cunfa,et al. Composition,origin and weathering process of surface sediment in Kumtagh Desert,Northwest China[J],2011,21(6):1062-1076.
APA	Xu Zhiwei.,Lu Huayu.,Zhao Cunfa.,Wang Xianyan.,Su Zhizhu.,...&Lu Qi.(2011).Composition,origin and weathering process of surface sediment in Kumtagh Desert,Northwest China.Journal of Geographical Sciences,21(6),1062-1076.
MLA	Xu Zhiwei,et al."Composition,origin and weathering process of surface sediment in Kumtagh Desert,Northwest China".Journal of Geographical Sciences 21.6(2011):1062-1076.