河北灵寿小文山碎云母矿成矿地质特征

The Mineralizing Geologic Characteristics of The Xiaowenshan Detrital Mica in Lingshou,Hebei

小文山碎云母矿的含矿岩石是一套以白云母钾长片麻岩为主体的变质岩，原岩为富硅高钾、低钙低镁的粘土质砂岩。碎云母矿的形成主要受晚期以钾质交代为主的混合岩化作用的影响，混合岩化过程中钾长石的水解作用导致碎云母矿的形成和富集。成矿作用主要经历早、晚两期，形成了矿石类型各异、片度、规模大小不同的碎云母矿体。

The ore-bearing rock of the Xiaowenshan detrital mica mineral is a set metamorphic rock that main body rock is muscovite K-feldspar gneiss. The protolith is clayey sandstone that high in Si,K and low in Ca,Mg. Genesis of the detrital mica mineral mianly was effect of migmatization with K-replacement. In the migmatization the hydrometosomatismof k-feldspar lead to formation and concentration of detrital mica mineral. The ore-forming proces underwent two stage of early and later, which result in the detrital mica bodys with variety of ore type,lamell asize, Scale.