Arid
DOI10.1016/j.gexplo.2016.11.006
The geochemical characteristics of dust material and dust sources identification in northwestern China
Zhang, Zhengcai1; Dong, Zhibao1; Zhang, Caixia1; Qian, Guangqian1; Lei, Chunying2
通讯作者Zhang, Zhengcai
来源期刊JOURNAL OF GEOCHEMICAL EXPLORATION
ISSN0375-6742
EISSN1879-1689
出版年2017
卷号175页码:148-155
英文摘要

To determine dust sources in the northwestern China, the spatial distribution of dust geochemical elements in the Hexi Corridor Desert, a total of 40 samples were collected at a height of 1.5 m over sandy and gravel surfaces at six field sites. In this work, 21 trace elements and seven major oxides were analyzed. Land surface characteristics influenced the dust emission, and the percentages of transported silt, clay, silt/sand, and clay/sand at a height of 1.5 m were related to gravel cover and the percentage of 0.063-mm-sized grains at the surface. The SiO2 content was the highest (mean 6120 +/- 9.17%), whereas the K(2)Ocontent was the lowest (mean 1.9 +/- 0.3%) in all field sites. For the six sites, the Ti content was the highest (mean 3247.5 +/- 502.5 mu g/g) and the Nb content was the lowest (mean 9.6 +/- 1.9 g/g). At all sites, Co, As, and Nd were enriched, whereas Mn, Ti, Sr, Ce, Ni, Rb, Y, P, V, Ga, and Ba were depleted. P, Ti, V, Ni, Rb, Sr, Y, Ba, and La originated from crustal sources, and Cl, Cr, Cu, and Zn were sensitive to anthropogenic activity. The main transported trace elements were Ti, Mn, Ba, P, CI, Sr, and Zr, which accounted for >90% of the total trace elements. PCA analysis indicated that two principal components with eigenvalues > 1 could be extracted from the data. The relationship between Rb/Sr and Ba/Sr and between Fe/Al, Mg/Al, and Ca/AI was used to identify dust sources. Two dust sources were identified in northwestern China: one source comprised the Badain Jaran Desert, Tengger Desert, Hexi Corridor Desert, and part of the Inner Mongolian Gobi Desert, and the other source comprised the desert adjacent to Dunhuang Gobi Desert, and part of the Inner Mongolian Gobi Desert. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词Geochemical Trace element Major element Dust sources
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000394472600014
WOS关键词CHEMICAL-COMPOSITION ; ASIAN DUST ; TRANSPORT ; AEROSOL ; MINERALOGY ; SEDIMENTS ; POLLUTION ; EMISSION ; EPISODES ; DESERTS
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
来源机构中国科学院西北生态环境资源研究院
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/200456
作者单位1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China;
2.Xinjiang Acad Forestry Sci, Inst Afforestat & Sand Control, Urumqi 830063, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Zhengcai,Dong, Zhibao,Zhang, Caixia,et al. The geochemical characteristics of dust material and dust sources identification in northwestern China[J]. 中国科学院西北生态环境资源研究院,2017,175:148-155.
APA Zhang, Zhengcai,Dong, Zhibao,Zhang, Caixia,Qian, Guangqian,&Lei, Chunying.(2017).The geochemical characteristics of dust material and dust sources identification in northwestern China.JOURNAL OF GEOCHEMICAL EXPLORATION,175,148-155.
MLA Zhang, Zhengcai,et al."The geochemical characteristics of dust material and dust sources identification in northwestern China".JOURNAL OF GEOCHEMICAL EXPLORATION 175(2017):148-155.
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