桂东金矿床的成因矿物学研究

STUDY ON GENETIC MINERALOGY OF GOLD DEPOSITS OF EASTREN GUANGXI

桂东金矿产于寒武系水口群浅变质砂页岩内，石英和黄铁矿是各类金矿中主要的载金矿物。成因矿物学标型特征表明，矿床可分为变质热液、岩浆热液和复合迭加型，以后者为主。据硫、铅、氢、氧同位素组成特征，结合石英的含金性、晶胞参数和热发光性及黄铁矿微量元素等成因信息，论证了成矿物质来源、成矿流体性质与成矿的关系。金的富集是处于造山带构造环境，经历加里东运动及其以后构造—岩浆活动多次迭加的长期演化结果。据矿物的标型特征和控矿条件，认为各矿区深部。

The gold deposits of eastern guangxi lie in the low grade metamorphic sandy shale of Shuikou Group of Camlzian system, quarty and pyrite are the major gold carriers in various gold deposits. The typomorphic characteristics of genetic mineralogy proves that the deposits can de divided into metamorphic hydrothermal, magmatic hydrothermal and compound and superposed types, the latter is considered as primary type.In accordance with the composite characteristics of S、Pb、H and O isotopes and in combination with gold bearing character, unit cell paramefre and thermal luminescence of quartz, as well as the trace elements of pyrite etc, the relation of the source of ore forming materials, the character of ore forming fluid to the mineralization is demonstrated. Gold concentration is the result of lying in the tectonic enviroment of orogenic belt, a long term evolution of caledonian movement and later many times tectonism and magmatism. According to typomorphic characteristics of minerals and ore controlling conditions, the depth or the periphery of every mine and the southeast of this regin are the prospect provinces for later further exploration.