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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
Source PublicationJOURNAL OF GEOCHEMICAL EXPLORATION
ISSN0375-6742
Volume152Pages:1-9
SubtypeArticle
Abstract

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.

KeywordTopsoil Types Chemical Index Of Alteration Gis Mapping Human Influence
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.gexplo.2014.12.008
WOS KeywordHeavy-metal Contamination ; Gis-based Approach ; Urban Soils ; Trace-elements ; Hong-kong ; Multivariate-analysis ; Agricultural Soils ; Water Chemistry ; Chemical Index ; Alteration Cia
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000352170500001
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9356
Collection粉尘与环境研究室
Corresponding AuthorCao, Junji
Affiliation1.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
Recommended Citation
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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