Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/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
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ISSN | 1866-6280 |
EISSN | 1866-6299 |
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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