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Impacts of grain size sorting and chemical weathering on the geochemistry of Jingyuan loess in the northwestern Chinese Loess Plateau
Liang, LJ (Liang, Lianji)[ 1,2 ]; Sun, YB (Sun, Youbin)[ 1 ]; Beets, CJ (Beets, Christiaan J.)[ 3 ]; Prins, MA (Prins, Maarten A.)[ 3 ]; Wu, F (Wu, Feng)[ 1 ]; Vandenberghe, J (Vandenberghe, Jef)[ 3 ]
2013-06-05
发表期刊JOURNAL OF ASIAN EARTH SCIENCES
卷号69期号:SI页码:177-184
文章类型期刊论文
摘要

Major and trace elemental compositions of loess samples collected from the Jingyuan section in the northwestern Chinese Loess Plateau (CLP) were analyzed to investigate the potential impacts of grain size sorting and chemical weathering on the loess geochemistry and to extract appropriate geochemical indices for better evaluating the East Asian monsoon variability. Based on variations of major and trace elements in different grain size fractions, seventeen elements were classified into three types: (1) Si and Na display higher contents with the increased particle sizes; (2) Al, Fe, Mg, K, Mn, Zn, Rb, Cr, V are mainly enriched in fine size fractions; (3) Ti, Ba, Zr, P. Ca and Sr show irregular variations among different size fractions. Comparison of Al-normalized elemental ratios with Zr/Rb and Rb/Sr ratios (two commonly employed indicators for grain size sorting and pedogenic weathering) indicates that Si/Al, Zr/Al, Ti/Al variations match well with Zr/Rb and grain size results, whilst Ca/Al, Sr/Al, P/Al ratios display similar variability as that of Rb/Sr ratio. Comparison of loess based proxies (e.g., elemental ratios, magnetic susceptibility, grain size) of Jingyuan section with speleothem and ice-core records confirms that elemental ratios of high-resolution loess sequences developed in the northwestern CLP can be employed to address fluctuations of the winter monsoon-induced grain size sorting and summer monsoon-related weathering and pedogenesis at glacial-interglacial and millennial timescales.

关键词Chinese Loess Elemental Geochemistry Grain Size Sorting Chemical Weathering East Asian Monsoon
DOI10.1016/j.jseaes.2012.12.015
收录类别SCI
语种英语
引用统计
被引频次:16[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/361006/9952
专题古环境研究室
通讯作者Liang, LJ (Liang, Lianji)[ 1,2 ]
作者单位1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
3.Faculty of Earth and Life Sciences, Vrije Universiteit, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
推荐引用方式
GB/T 7714
Liang, LJ ,Sun, YB ,Beets, CJ ,et al. Impacts of grain size sorting and chemical weathering on the geochemistry of Jingyuan loess in the northwestern Chinese Loess Plateau[J]. JOURNAL OF ASIAN EARTH SCIENCES,2013,69(SI):177-184.
APA Liang, LJ ,Sun, YB ,Beets, CJ ,Prins, MA ,Wu, F ,&Vandenberghe, J .(2013).Impacts of grain size sorting and chemical weathering on the geochemistry of Jingyuan loess in the northwestern Chinese Loess Plateau.JOURNAL OF ASIAN EARTH SCIENCES,69(SI),177-184.
MLA Liang, LJ ,et al."Impacts of grain size sorting and chemical weathering on the geochemistry of Jingyuan loess in the northwestern Chinese Loess Plateau".JOURNAL OF ASIAN EARTH SCIENCES 69.SI(2013):177-184.
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