摘要
风化壳的形成过程中化学风化因素尤为重要,江西相山响石风化壳不同部位遭受的风化程度不一。为了解风化作用对不同风化部位中微量元素的迁移影响,本文以江西相山风化壳中风化土样、风化球体及基岩为研究对象开展地球化学分析。微量元素方面,以Rb、Sr、Ba、Cs为代表的活动性元素,随着风化作用的进行,逐步从寄主矿物中淋失,风化土样、风化球体与基岩的元素含量表现出明显差异;过渡系金属Sc、V、Cr的含量变化差别不大,被有效地保留;风化土样与风化球体和基岩均富集Rb、Th、U、Nb、Ce、Nd、Hf、Ti、Yb,风化土样与风化球体和基岩具有较为一致的分布趋势;Th、U的分布与其自身性质有关,基岩与风化球体和风化土样三者在风化过程中Th含量基本保持不变,U含量出现一定差异;相山风化壳中不同部位风化程度不一,微量元素的地球化学特征不一。
The chemical weathering factors are particularly important in the formation of weathered crust.The weathering degree of different parts of Xiangshi weathered crust in Xiangshan,Jiangxi Province is different.In order to understand the influence of weathering on the migration of trace elements in different weathering parts,this paper carried out geochemical analysis on weathered soil samples,weathered spheres and bedrock in Xiangshan weathered crust of Jiangxi Province.In terms of trace elements,the active elements represented by Rb,Sr,Ba and Cs gradually leached from host minerals with the progress of weathering,and the element contents of weathered soil samples,weathered spheres and bedrock showed obvious differences.The contents of Sc,V and Cr in the transition metal have little difference and are effectively retained.Rb,Th,U,Nb,Ce,Nd,Hf,Ti and Yb are enriched in weathered soil samples,weathered sphere and bedrock,and the distribution trend of weathered soil samples is consistent with that of weathered sphere and bedrock.The distribution of Th and U is related to their own properties.The content of Th in bedrock,weathered sphere and weathered soil samples remains basically unchanged during weathering,while the content of U is different among them.The weathering degree of different parts of Xiangshan weathered crust is different,and the geochemical characteristics of trace elements are different.
作者
田亚
杨永乐
刘小单
Tian Ya;Yang Yongle;Liu Xiaodan(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang,Jiangxi,330013,China)
出处
《化工矿产地质》
CAS
2023年第3期203-209,共7页
Geology of Chemical Minerals
关键词
风化球体
元素地球化学
微量元素
相山
Weathered sphere
Element geochemistry
Trace element
Xiangshan
