Arid
DOI10.1007/s12665-013-2323-1
Geochemical characteristics and environmental significance of Talede loess-paleosol sequences of Ili Basin in Central Asia
Zhang, Wenxiang1,2; Shi, Zhengtao1,2; Chen, Guangjie1; Liu, Yong1; Niu, Jie1; Ming, Qingzhong1; Su, Huai1
通讯作者Shi, Zhengtao
来源期刊ENVIRONMENTAL EARTH SCIENCES
ISSN1866-6280
EISSN1866-6299
出版年2013
卷号70期号:5页码:2191-2202
英文摘要

The loess-paleosol deposit in Central Asia is a sensitive indicator of the evolution of the quaternary paleoclimate in the Westerlies, providing insight into the quaternary climate history and its relationship with global climatic changes. Based on the geochemical analysis of elemental composition of densely sampled strata from Talede loess-paleosol sequence in the Ili Basin, the results showed that SiO2 had the highest major elements content, followed by Al2O3. The order of compositional abundance of major elements was generally as follows: SiO2 > Al2O3 > CaO > Fe2O3 > MgO > Na2O > K2O. Trace elements (i.e. Rb, Sr, Sc, Ni, Cu, Ga, Mo, Y, Pb, Th) in the paleosol layers (i.e. S (0), S (m), S (1)) and the loess layer of L (1) were enriched relative to underlain loess (L (2)) horizons, except for the contents of Zr, Cs, Nd, and La in paleosol layers. All of geochemical proxies, such as enrichment factor, Rb/Sr ratio, eluvial coefficient (K (i) ) and chemical weathering index, display no obvious differentiation in the Talede loess-paleosol deposit. The results indicate that the weak chemical weathering, greater evaporation and low effective moisture in Ili Basin, are to a degree weaker than those in the China Loess Plateau and the climate was warm-dry during the interglacial period. In addition, the loess of Ili area is rich in schistose minerals and implies that the loess may come from the deserts of Central Asia and it may be closely related to the widespread aridification of Central Asia.


英文关键词Ili Basin Geochemical elements Paleoclimate Central Asian
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000326046100024
WOS关键词CHEMICAL-WEATHERING HISTORY ; LAST 130,000 YEARS ; CHINESE LOESS ; CONTINENTAL-CRUST ; SUMMER MONSOON ; CLIMATE-CHANGE ; PLATEAU ; DESERT ; RATIOS ; PLEISTOCENE
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Geology ; Water Resources
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/2XILL650/176932
作者单位1.Yunnan Normal Univ, Key Lab Geog Proc & Environm Change Plateau Yunna, Kunming 650500, Peoples R China;
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Wenxiang,Shi, Zhengtao,Chen, Guangjie,et al. Geochemical characteristics and environmental significance of Talede loess-paleosol sequences of Ili Basin in Central Asia[J]. 中国科学院地球环境研究所,2013,70(5):2191-2202.
APA Zhang, Wenxiang.,Shi, Zhengtao.,Chen, Guangjie.,Liu, Yong.,Niu, Jie.,...&Su, Huai.(2013).Geochemical characteristics and environmental significance of Talede loess-paleosol sequences of Ili Basin in Central Asia.ENVIRONMENTAL EARTH SCIENCES,70(5),2191-2202.
MLA Zhang, Wenxiang,et al."Geochemical characteristics and environmental significance of Talede loess-paleosol sequences of Ili Basin in Central Asia".ENVIRONMENTAL EARTH SCIENCES 70.5(2013):2191-2202.
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