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

作     者：ZHANG Jialin ZHAO Zhongqiang XIA Dinghong LI Zhenyang ZENG Liyuan HE Hongming SONG Yinxian CHEN Zhong 张佳琳;ZHAO Zhongqiang;XIA Dinghong;LI Zhenyang;ZENG Liyuan;HE Hongming;SONG Yinxian;CHEN Zhong

作者机构：School of Land and Resources EngineeringKunming University of Science and TechnologyKunming 650093P.R.China Key Laboratory of Geological Disaster Prediction and Early Warning and Ecological Protection and Restoration of Plateau MountainMinistry of Natural ResourcesKunming 650093P.R.China Yunnan Key Laboratory of Geological Disaster Prediction and Warning and Ecological Protection and Restoration of Plateau and MountainKunming 650093P.R.China School of Geographical SciencesEast China Normal UniversityShanghai 200241P.R.China Institute of Soil and Water ConservationMinistry of Water ResourcesChinese Academy of SciencesYangling 712100P.R.China 

出 版 物：《High Technology Letters》 (高技术通讯（英文版）)

年 卷 期：2024年第30卷第3期

页      面：310-321页

核心收录：

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

基　　金：the National Natural Science Foundation of China(No.41561001 42271007) 

主　　题：loess chemical weathering element geochemistry chemical index of alteration(CIA) 

摘      要：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 *** 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 *** average ofΣREE is 171.91ppm with a negative anomaly forδEu and essentially no anomaly forδ*** results of K_(2)O/Na_(2)O,Rb/Sr ratios,as well as the leaching co-efficient from three profiles,indicate DJPJXJZT,suggesting that DJP experiences the strongest weathering leaching *** chemical index of alteration(CIA)reveals that all three profiles of loess are in the primary stage of Ca and Na *** is generally in the early to moderate stage of chemical weathering,while JX and JZT are both in the early stage.