广西贵港红土风化壳的地球化学特征

GEOCHEMICAL CHARACTERISTICS OF LATERITIC WEATHERING CRUST IN GUIGANG，GUANGXI

广西中南、东南部碳酸盐岩红土风化壳发育完好．鉴于整个剖面中化学组分的渐变关系和剖面底部过渡层的存在，可以确认这是碳酸盐岩的风化产物．本文通过对贵港市覃塘红土风化壳各层化学组分的计算和分析研究，推断红土风化壳形成的地球化学过程，指出剖面各层位是与所处外部环境取得物理化学平衡的产物．这将有助于阐明红土型矿产的形成条件，指出找矿方向．

The lateritic weathering crust in carbonate rocks is well developed in the central southand southeast of Guangxi．In view of the features that gradually change in chemical composi-tion in all sections and the transition bed at its bottom ，it can be confirmed that the lateriticweathering crust is the weathering product of carbonate rocks．The chemical composition ofeach bed of lateritic weathering crust in Qintang are calculated，analysed and studied here，which explains the geochemical process of formation of the lateritic weathering crust，andshows that each bed in all sections is the balanced product physicochemistry with the exter-nal environment．All mentioned above will be advantageous to the elaboration of formingcondition of lateritic mineral resources and their prospecting direction.