首页|Geochemical characteristics and environmental implications of loess sequences in the Loess Plateau

Geochemical characteristics and environmental implications of loess sequences in the Loess Plateau

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Geochemical characteristics and environmental implications of loess sequences in the Loess Plateau
The major,trace,and rare earth elements of the Duanjiapo(DJP)section in the south of the Loess Plateau,the Jiaxian(JX)section in the north,and the Jiuzhoutai(JZT)section in the west are studied.The results show that the main elemental characteristics of loess in three profiles are consistent with the upper continental crust(UCC).In terms of trace elements,Th,Nb,Zr,Hf,Y,Cs,W,Cr,V,Li,and Pb show relative enrichment compared with UCC;Rb,Ba,Sr and Be exhibit relative depletion.The average of ΣREE is 171.91ppm with a negative anomaly for δEu and essentially no anomaly for δCe.The results of K2O/Na2O,Rb/Sr ratios,as well as the leaching co-efficient from three profiles,indicate DJP>JX>JZT,suggesting that DJP experiences the strongest weathering leaching effect.The chemical index of alteration(CIA)reveals that all three profiles of loess are in the primary stage of Ca and Na depletion.DJP is generally in the early to moderate stage of chemical weathering,while JX and JZT are both in the early stage.

loesschemical weatheringelement geochemistrychemical index of alteration(CIA)

张佳琳、ZHAO Zhongqiang、XIA Dinghong、LI Zhenyang、ZENG Liyuan、HE Hongming、SONG Yinxian、CHEN Zhong

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School of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,P.R.China

Key Laboratory of Geological Disaster Prediction and Early Warning and Ecological Protection and Restoration of Plateau Mountain,Ministry of Natural Resources,Kunming 650093,P.R.China

Yunnan Key Laboratory of Geological Disaster Prediction and Warning and Ecological Protection and Restoration of Plateau and Mountain,Kunming 650093,P.R.China

School of Geographical Sciences,East China Normal University,Shanghai 200241,P.R.China

Institute of Soil and Water Conservation,Ministry of Water Resources,Chinese Academy of Sciences,Yangling 712100,P.R.China

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loess chemical weathering element geochemistry chemical index of alteration(CIA)

2024

10.3772/j.issn.1006-6748.2024.03.011

高技术通讯(英文版)
中国科学技术信息研究所（ISTIC）

高技术通讯(英文版)

影响因子：0.058
ISSN：1006-6748
年,卷(期)：2024.30(3)