河南省新安县石寺铝土矿的物质来源及形成过程探讨

The discussion about the material sources and forming process of bauxite in Shisi,Xin'an

通过对新安石寺铝土矿及其底板、古岛周边地层中的常量及稀土元素的采集与分析,认为铝土矿成矿物质主要来源于灰岩的"风化壳";通过稀土元素、古地理环境、古气候的分析,结合铝土矿的分布特点,认为古岛(或古陆)的形成使得地层充分暴露并进行充分的红土化作用,同时有利于溶解有"硅、钙、铁"等元素的水流动,碳酸盐化促进了含铝物质的水解作用,使铝富集形成铝土矿床。从而为寻找铝土矿提供理论依据。

Based on the collection and analysis about constant elements and rare earth elements of bauxite in Shisi, Xin＇an, its bottom and the ancient is- land surrounding strata, we summarized that bauxite metallogenic material mainly came from the weathering crust of limestone. Through the analysis about rare earth elements, ancient geography environment and paleoclimate, combined with the distribution of bauxite, we summarized that the formation of the ancient island made stratigraphic fully exposed and laterization, and helping the water of dissolution the elements such as silicon, calcium, iron flowing. Carbonatization promoted the hydrolysis of aluminum material, and made the aluminum concentration form bauxite deposit. Therefore, this summarization above provided theoretical basis for exploration bauxite.