山西铝土矿床成矿物质来源

山西铝土矿矿石中鲕、豆、碎屑等组构均具红土性质，结合化学成分特征、稀土元素特征、氧同住素特征、锆石等副矿物特征及含矿岩系底部岩层与下伏中奥陶纪灰岩关系和矿床分布与古陆、古岛的依赖关系等方面分析，铝土矿的成矿物质多是异源的，多为古陆上的铝硅酸盐岩红土风化产物，经流水以机械碎屑形式被搬运至海盆，沉积成矿

SOURCE OF ORE-FORMING MATERIALS FORBAUXITE DEPOSITS IN SHANE PROVINCE

Pisolites , ooids and fragments structures in bauxite ore of Shanxi Province are of lateritic characteristics, On the basis of analysing ore chemical composi- tion, rare earth elements, oxygen isotope, the features of accessory minerals like zir- con, the contact relationship between ore - bearing bottom layer and underlying middle Ordovician limestone and the dependent relation between bauxite deposit distribution and old lands and old islands , etc , it has been concluded that bauxite ore-forming ma- terials are mainly exotic. They were dominanrly the weathering products of aluminium silicates on old lands and were mechanically transported as fragments into sea basins and were deposited there.