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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
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
Volume69Issue:SIPages:177-184
Subtype期刊论文
Abstract

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.

KeywordChinese Loess Elemental Geochemistry Grain Size Sorting Chemical Weathering East Asian Monsoon
DOI10.1016/j.jseaes.2012.12.015
Indexed BySCI
Language英语
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Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9952
Collection古环境研究室
Corresponding AuthorLiang, LJ (Liang, Lianji)[ 1,2 ]
Affiliation1.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
Recommended Citation
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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