中国浅成低温热液型金矿床地质特征及研究现状

自20世纪70年代环太平洋地区发现大批浅成低温热液型金矿以来,浅成低温热液型金矿已经成为当前金矿地质研究的热点,它也是目前世界上最为重要的金矿床类型之一。浅成低温热液型金矿床的形成时代受其所处大地构造环境演化的控制。一般产于岛弧环境或大陆边缘环境的中—酸性陆相火山岩系及相邻岩石中。根据矿物组合及蚀变特征,浅成低温热液型金矿床可划分为高硫化型和低硫化型。高硫化型浅成低温热液金矿床与斑岩型铜—金矿床往往密切共生,它们可能是同一成矿系统的产物。理论上,中国浅成低温热液型金矿的成矿条件比较优越,找矿前景广阔。

Geological Characteristics of Epithermal Gold Deposits and Status Quo of Researches in China

Since large quantities of epithermal gold deposits were discovered in Circum-Pacific region in 1970's,it has already become the hot spot of the gold deposits research these days.It is also one of the most important gold deposit types in the world.The metallogenic period of epithermal gold deposit is predominantly controlled by the tectonic evolution.Epithermal gold deposit is generally hosted by intermediate-acid volcanic rock series and adjacent rocks in island arc or continental margin.The epithermal gold deposit can be divided into two types according to the features of mineral assemblage and alteration:high sulfur type & low sulfur type.The high-sulfer epithermal gold deposits show generally paragenetic relationship with porphyry copper-gold deposits and they may be products of the same mineralization system.Theoretically,the conditions for epithermal gold deposits mineralization are quite good in China.Thus it is surely a bright future for prospecting of such deposits.