辽南石槽剖面红色风化壳地球化学特征初步分析

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英文篇名：Preliminary geochemical characteristics of red weatherng crust in Shicao profile,southern Liaoning province 作者：蒋伟 ; 李永化 ; 魏东岚 ; 沈俊杰 英文作者：JIANG Wei;LI Yonghua;WEI Donglan;SHEN Junjie;College of Urban and Environmental Sciences,Liaoning Normal University; 关键词：化学风化 ; 红色风化壳 ; 常量元素 ; 微量元素 ; 辽南地区 英文关键词：chemical weathering;;red weathering crust;;major element;;trace element;;southern Liaoning province 中文刊名：GHZH 英文刊名：Journal of Arid Land Resources and Environment 机构：辽宁师范大学城市与环境学院; 出版日期：2019-02-26 出版单位：干旱区资源与环境 年：2019 期：v.33;No.249 基金：国家自然科学基金项目(41271093)资助 语种：中文; 页：GHZH201905021 页数：6 CN：05 ISSN：15-1112/N 分类号：128-133

摘要

通过对元素含量分布特征、元素活化情况以及化学风化强度的分析,研究辽南石槽剖面红色风化壳的地球化学特征,为认识不同地区红色风化壳风化特征的空间差异提供初步依据。结果表明:石槽剖面红色风化壳的化学组成以SiO_2、Al_2O_3和Fe_2O_3为主,化学风化过程中Fe、K、Na、Mg和Ca发生不同程度的迁移淋失,而Al、Si相对富集。微量元素含量平均值排序为MnO>ZrO_2>Cr_2O_3>Rb_2O>ZnO>NiO>SrO>CuO,Ni、Cu、Zn、Sr、Mn等微量元素强烈亏损,淋失程度随风化程度的增强而增强。石槽剖面红色风化壳发育在较温暖、湿润的气候条件下,处于脱Ca、Na富Al的中等化学风化阶段。
        The geochemical characteristics of the red weathering crust from the Shicao profile was studied,contents and distributions of elements,activation of elements and the intensity of chemical weathering were analyzed in order to provide basis for spatial difference of the red weathering crust that distributed in different areas. The results showed that the bedrock of the Shicao profile is carbonate rocks. The major elements are mainly SiO_2,Al_2O_3 and Fe_2O_3. In the process of chemical weathering,the migration and leaching characters of Fe,K,Na,Mg and Ca were happened,and Al and Si relatively enrich. The sorting of trace elements content is MnO > ZrO_2> Cr_2O_3> Rb_2O > ZnO > Ni O > SrO > CuO. Ni,Cu,Zn,Sr and Mn are obviously depleted,and the degree of leaching is along with chemical weathering. The CIA of the red weathering crust from the Shicao profile is 82.46,instructing that its development environment was in a temperate climatic condition that was relatively warm and humid,and the degree of geochemical weathering is medium,Na and Ca leached obviously,and Al relatively enrich in the process of chemical weathering.

引文

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