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Lithium distribution and isotopic fractionation during chemical weathering and soil formation in a loess profile
Tsai, PH (Tsai, Pei-Hsuan)[ 1 ]; You, CF (You, Chen-Feng)[ 1,2 ]; Huang, KF (Huang, Kuo-Fang)[ 3 ]; Chung, CH (Chung, Chuan-Hisung)[ 1 ]; Sun, YB (Sun, You-Bin)[ 4 ]
2014-06-15
发表期刊JOURNAL OF ASIAN EARTH SCIENCES
卷号87页码:1-10
文章类型期刊论文
摘要

Lithium (Li) is a fluid-mobile element and delta Li-7 in secondary deposits represents an excellent proxy for silicate weathering and authigenic mineral formation. The soil samples from 1205 to 1295 cm in the Weinan profile, one of the best developed loess-paleosol sequences covering the last glacial-interglacial climatic cycle, were collected and chemically separated into detritus and carbonate fractions for subsequent analyses of Li, delta Li-7, major and trace elements. Other desert specimens (i.e., Qaidam Desert, Tengger Desert, Badain Juran Desert and Taklimakan Desert) near the Chinese Loess Plateau (CLP) and various standard clays were analyzed for assisting provenance determination. The Li and delta Li-7 distributions in the detritus are rather homogeneous, 1.4-2.0 mu g/g and +2.5 parts per thousand to +4.7 parts per thousand, respectively, compared with the carbonate fraction. The detrital delta Li-7 varies systematically with magnetic susceptibility and grain size changes, reflecting significant Li isotopic variation associated with sources and mineralogy of detrital material. On the other hand, Li and delta(7) Li in carbonates show large changes, 781-963 ng/g and -4.1 parts per thousand to +10.2 parts per thousand, respectively. These carbonate Ski correlated well with the estimated index of chemical weathering, as a result of Li mobilization and soil formation during chemical weathering.

关键词Lithium Isotope Weinan Chemical Weathering Secondary Minerals
DOI10.1016/j.jseaes.2014.02.001
收录类别SCIE
语种英语
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9795
专题古环境研究室
通讯作者You, CF (You, Chen-Feng)[ 1,2 ]
作者单位1.Department of Earth Sciences, National Cheng Kung University, Tainan 701, Taiwan;
2.Earth Dynamic System Research Center, National Cheng Kung University, Tainan 701, Taiwan;
3.Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan;
4.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Beijing 100864, People’s Republic of China
推荐引用方式
GB/T 7714
Tsai, PH ,You, CF ,Huang, KF ,et al. Lithium distribution and isotopic fractionation during chemical weathering and soil formation in a loess profile[J]. JOURNAL OF ASIAN EARTH SCIENCES,2014,87:1-10.
APA Tsai, PH ,You, CF ,Huang, KF ,Chung, CH ,&Sun, YB .(2014).Lithium distribution and isotopic fractionation during chemical weathering and soil formation in a loess profile.JOURNAL OF ASIAN EARTH SCIENCES,87,1-10.
MLA Tsai, PH ,et al."Lithium distribution and isotopic fractionation during chemical weathering and soil formation in a loess profile".JOURNAL OF ASIAN EARTH SCIENCES 87(2014):1-10.
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