浙江仇山矿区膨润土、高岭土矿石矿物地质特征

The geological feature of Kaolin?bentonite ore minerals of Choushan mine, Zhejiang province

仇山膨润土矿赋存于上侏罗统劳村组火山岩中。Ⅰ、Ⅱ矿层为主矿层 ,成矿母岩为火山玻璃岩。矿石经X衍射、差热及阳离子交换量等手段测试 ,按其埋藏深度由浅而深依次为钙基膨润土→钠钙基膨润土→钠基膨润土→高岭土 ,具蒙脱石向高岭石矿物变化的地质特征。对其形成的成因机理作了分析探讨 ,系不同的成矿方式和介质条件所致。

The bentonite ore of Choushan is hosted in late Jurassic volcanic rocks. The mother rock of major ore beds Ⅰ?Ⅱ is volcanic glass. The ore minerals are Ca-bentonite→Na?Ca-bentonite→Na-bentonite→kaolin from shallow to deep bed, showing the various features from bentonite to kaolin. In this paper, the minerogenetic mechanisms are discussed, which are formed by different genetic styles and medium conditions.