黔东八克金矿地质地球化学特征研究

在黔东众多的石英脉型金矿床（点）中，八克金矿具有非常独特的地质和地球化学特征。文章在总结了八克金矿地质特征的基础上，采用电子探针、矿物包襄体、均一测温、稳定同位素、微金分析等方法，对该矿的地球化学特征进行了研究。结果表明：八克金矿的二十多条石英脉普遍金矿化，多在1g／t以上；脉中的石英及毒砂矿物颗粒普遍较大，毒砂在富矿包内可呈大的团块状、似层状产出；矿区围岩蚀变广泛而强烈；石英包襄体中普遍含CO2、硫同位素具陨石硫。上述特点均可与黔东其他脉型金矿相区别。

A STUDY ON THE GEOLOGICAL AND GEOCHEMICAL CHARACTERISTICS OF BAKE GOLD DEPOSIT,EAST GUIZHOU

There are numerous quartz vein-type gold deposits and occurrences in the east of Guizhou, but the Bake deposit is a unique one with special geologica and geochemical characteristics. The study shows more than 20 veins in Bake have been mineralized, with the god grade ahave 1 g/t. Quaxtz, arsenopyrite and other sulfides in the veins are bigger in size than those in other deposits. The lump-and layer-shaped arsenopyrite can be recognized in ore shcots. Wall-rock alteration is extensive and strong.Quartz inclusions ootnmonly contain CO2. The ore-forming temperature is about 100℃ higher than that of others. The S isotopic composition is characteristic of meteorite.