It is the contamination that conceals the genuine origin of the ore bearing fluid to a certain extent.
通过稀土元素配分模式的详细对比和地球化学演化规律的研究，论证了滇黔桂地区金矿的成矿物质主要来源于上地幔分异，但深部成矿流体在运移至地壳的成矿过程中不可避免地混染了部分地壳（地层）物质，从而在一定程度上掩盖了成矿物质的实质来
This article discusses Fanshan Schorlomite s mineralogy,mineral chemistry,X rays diffraction pattern,electron probing analysis of zonal structure and its geological background,and obtains the conclusion of genesis of assimilation and contamination.
论述了矾山钛榴石的矿物学特征、矿物化学、X光粉晶衍射鉴定特征和钛榴石环带电子探针数据以及其形成的地质背景 ,得出矾山钛榴石为同化混染成因的结