Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.gexplo.2014.12.008 |
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![]() | |
通讯作者 | Cao, Junji |
来源期刊 | JOURNAL OF GEOCHEMICAL EXPLORATION
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ISSN | 0375-6742 |
EISSN | 1879-1689 |
出版年 | 2015 |
卷号 | 152页码:1-9 |
英文摘要 | 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. |
英文关键词 | Topsoil types Chemical index of alteration GIS mapping Human influence |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000352170500001 |
WOS关键词 | HEAVY-METAL CONTAMINATION ; URBAN SOILS ; AGRICULTURAL SOIL ; TRACE-ELEMENTS ; CHEMICAL INDEX ; ALTERATION CIA ; QAIDAM BASIN ; MINE AREA ; GEOCHEMISTRY ; CHINA |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
来源机构 | 中国科学院地球环境研究所 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/188640 |
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]. 中国科学院地球环境研究所,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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