Elemental Compositions of Surface Deposits in Hexi Corridor and Its Adjacent Areas, Northwestern China

详细信息   

• 责任者：Wang Liqiang (No.719 Geological Survey Team ; Guangdong Bureau of Geology ; Zhaoqing 526000 ; China) ; Wang Qin
• 刊名：Northwestern Geology
• 出版年：2013
• 卷期：46(2)
• 关键词：物源分析 ; provenance analysis ; 沉积物 ; sediments ; 河西走廊 ; Hexi Corridor
• 页码：p.69-80
• 图表：9 illus., 1 table, 40 refs.
• 分类号：1400
• issnNo：ISSN1009-6248
• isbnNo：CN61-1149/P

摘要

     Elemental compositions of surface deposits, collected from the gobi (rock desert), river plain (alluvium of Shiyang River and Heihe River), desert (Tengger and Badain Jaran) and northern piedmont of Qilian Mountains in the Hexi Corridor and its adjacent areas, were analyzed. Meanwhile, elemental composition between the Luochuan loess and the different types of surface sediments in the study region were also compared. The results showed that geochemical features of incompact deposits among different types of surface in the researched area, which may come from the altiplanation of Qilian Mountains, are aligned fairly well. As a result, weathering indices of surface deposits in the Hexi Corridor are lower than that in the piedmont of Qilian Mountains. Because of the stronger wind erosion in Tengger and Badain Jaran desert, the median particle diameter of dune sand there is the coarsest, which results in the lowest indices of chemical weathering.