超大型矿床锡矿山锑矿成矿地质条件研究

A Study on the Metallogenic and geological condition of the Ulta—large Antimony Mine of Xikuangshan

锡矿山锑矿属世界性的超大型矿床,它赋存在一个独特的构造抬升块中。表层褶皱是重要的控矿构造,基底断裂为主要导矿构造;矿田出露地层水源补给条件较好,是良好的供卤环境,佘田桥组中段为理想的赋矿岩系;硅化岩是锑矿化有利的寄主岩石;成矿物质,来源于矿田深部古水热活动区的前泥盆系;隐伏酸性岩体是古水热活动/循环的理想热源。锡矿山锑矿,是形成于古水热活动区的典型矿床。

Xikuangshan mine is a uniquely ulta—large antimony deopsit in the world. It occurs in special up-lifted block formed by the tectonic process. Its superficial fold is the important structure for ore-controlling and the basement fault the main passage of ore fluid. Strata in the orefield possess a better condition of water rechareging and are also the good environment for the supply of haloid solution. The Middle part of Shetianqiao formation is the ideal ore—containing rock series in which silicified rock becomes the most favourable host rock for antimony mineralization. Ore-forming materials are derived from the predevonian strata, beneath the orefield, where the deep paleo—hydrothermal solution acts vigorously. A concealed acidic ignous rock should be the ideal heat—source of the hydrothermal activity and circulation. Author believes that Xikuangshan antimony mine is a typical deposit formed in such an active area.