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Elemental distribution in the topsoil of the Lake Qinghai catchment, NE Tibetan Plateau, and the implications for weathering in semi-arid areas
Wang, Ping1,2; Cao, Junji1,2,3; Han, Yongming1,2; Jin, Zhangdong2; Wu, Feng1,2; Zhang, Fei2
2015-05-01
发表期刊JOURNAL OF GEOCHEMICAL EXPLORATION
ISSN0375-6742
卷号152页码:1-9
文章类型Article
摘要

An understanding of topsoil geochemistry within a watershed helps to identify the influence of natural processes and anthropogenic activities in the environment. Fifteen elements were measured in 73 topsoil samples (top 30 cm) from the Lake Qinghai catchment, NE Onghai-Tibetan Plateau (QTP) in 2009, to investigate geochemical patterns, identify possible sources and explore the implications of chemical weathering. Compared with their content in the upper continental crust (UCC), a deficit of Cu and Zn and an enrichment of Pb were identified in the study area. Enriched Ca levels were observed in alpine soil and pedocal, solonchak and aeolian sand soils, whereas there was a loss in hydromorphic and semi-hydromorphic soils. High Na in marsh solonchak indicated the possible presence of evaporites. Cluster analysis (CA) and principal component analysis (PCA) indicated the dominance of carbonate and the accumulation of P, possibly from grassland litterfall in topsoil. Some human activities have exerted an influence on virgin topsoil, as revealed by GIS mapping. The implications for chemical weathering, based on a chemical index of alteration (CIA) and an Al2O3-(CaO* + Na2O)-K2O (A-CN-K) diagram were characterised by a major carbonate control of the primary weathering stage under cold-dry climatic conditions with Ca and/or Na removal. (C) 2014 Elsevier B.V. All rights reserved.

关键词Topsoil Types Chemical Index Of Alteration Gis Mapping Human Influence
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.gexplo.2014.12.008
关键词[WOS]Heavy-metal Contamination ; Gis-based Approach ; Urban Soils ; Trace-elements ; Hong-kong ; Multivariate-analysis ; Agricultural Soils ; Water Chemistry ; Chemical Index ; Alteration Cia
收录类别SCI
语种英语
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000352170500001
出版者ELSEVIER SCIENCE BV
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9356
专题粉尘与环境研究室
通讯作者Cao, Junji
作者单位1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China
3.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
推荐引用方式
GB/T 7714
Wang, Ping,Cao, Junji,Han, Yongming,et al. Elemental distribution in the topsoil of the Lake Qinghai catchment, NE Tibetan Plateau, and the implications for weathering in semi-arid areas[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2015,152:1-9.
APA Wang, Ping,Cao, Junji,Han, Yongming,Jin, Zhangdong,Wu, Feng,&Zhang, Fei.(2015).Elemental distribution in the topsoil of the Lake Qinghai catchment, NE Tibetan Plateau, and the implications for weathering in semi-arid areas.JOURNAL OF GEOCHEMICAL EXPLORATION,152,1-9.
MLA Wang, Ping,et al."Elemental distribution in the topsoil of the Lake Qinghai catchment, NE Tibetan Plateau, and the implications for weathering in semi-arid areas".JOURNAL OF GEOCHEMICAL EXPLORATION 152(2015):1-9.
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