晴隆大厂锑矿床容矿层硅质来源的研究

On the Silicon Source of Host Rock of Dachang Antimony Deposit in Southwestern Guizhou Province

在研究大厂锑矿床容矿层及顶底板岩石特征、化学成分及硫同位素组成的基础上,笔者认为其岩石中丰富的硅质与峨眉山玄武岩喷发作用、玄武岩侵入水体发生海解和埋藏变质过程密切有关,成矿过程将硅质运移到位,使大厂层及顶底板岩石多阶段硅化;

Based on the lithology, chemical components and S_isotope composition of the host rock and the hanging_wall and foot_wall, the author considers that the abundant silicon is largely concerned with eruption of basalt in Permian. During the basalt lava was poured into the seawater, marine dissolution took place in it, and then the basalt was buried to be metamorphosed. Both halmyrolysis and burial released silicon to form “Dachangceng Stratum” and make the hanging_wall and foot_wall silicated repeatedly. In addition, also a great number of silicon can be separated from weathered basalt during retrogressive metamorphism process.