广西靖西三合铝土矿铝矿物特征及成因机制分析  

Mineral feature of bauxite in Sanhe Bauxite Mine,Jingxi of Guangxi and its analysis of genesis mechanism

作　　者：李普涛[1] 张起钻[2] 

机构地区：[1]桂林工学院,广西桂林541004 [2]中国地质大学

出　　处：《轻金属》2008年第8期6-9,共4页Light Metals

基　　金：广西“十千百人才工程”专项资金项目,(2002215)

摘　　要：以光薄片观察、X射线衍射分析及电子探针等先进方法为手段,对靖西县三合铝土矿的硬水铝石和三水铝石的矿物特征进行研究,并探讨其成因机制。研究认为:本区三水铝石主要为表生条件下,含铝母岩经红土化风化作用形成;硬水铝石主要为三水铝石经变质作用脱水形成,形成硬水铝石的三水铝石是地质历史上含铝母岩的红土化作用形成。The mineral feature and its genesis mechanism of diaspore and gibbsite in Sanhe Mine of Jingxi County are studied with observation of polished thin section, X ray diffraction and electronic probe in the paper. It shows that gibbsite in the area is formed from matrices containing alumina through laterization weathering under hypergene conditions and diaspore is mainly formed from degenerated and dewatered gibbsite.

关 键 词：铝土矿 硬水铝石 三水铝石 成因机制 

分 类 号：P618.45[天文地球—矿床学]