Geochemical characteristics and environmental significance of Talede loess-paleosol sequences of Ili Basin in Central Asia
Zhang, WX (Zhang, Wenxiang)[ 2,1 ]; Shi, ZT (Shi, Zhengtao)[ 2,1 ]; Chen, GJ (Chen, Guangjie)[ 1 ]; Liu, Y (Liu, Yong)[ 1 ]; Niu, J (Niu, Jie)[ 1 ]; Ming, QZ (Ming, Qingzhong)[ 1 ]; Su, H (Su, Huai)[ 1 ]
2013-11-30
发表期刊Environmental Earth Sciences
卷号70期号:5页码:2191-2202
文章类型期刊论文
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 SiO2had 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. S0, Sm, S1) and the loess layer of L1were enriched relative to underlain loess (L2) 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 (Ki) 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.

关键词Ili Basin Geochemical Elements Paleoclimate Central Asian
DOI10.1007/s12665-013-2323-1
收录类别SCI ; EI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/10058
专题黄土与第四纪地质国家重点实验室(2010~)
通讯作者Shi, ZT (Shi, Zhengtao)[ 2,1 ]
作者单位1.Key Laboratory of Geographical Process and EnvironmentalChange in the Plateau of Yunnan Province, Yunnan NormalUniversity, Kunming 650500, China;
2.State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment, Chinese Academy of Sciences,Xi’an 710075, China
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GB/T 7714
Zhang, WX ,Shi, ZT ,Chen, GJ ,et al. Geochemical characteristics and environmental significance of Talede loess-paleosol sequences of Ili Basin in Central Asia[J]. Environmental Earth Sciences,2013,70(5):2191-2202.
APA Zhang, WX .,Shi, ZT .,Chen, GJ .,Liu, Y .,Niu, J .,...&Su, H .(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, WX ,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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