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乳山金矿床位于胶东昆嵛山复式花岗岩体的黑云母二长花岗岩中,属石英脉型,其中Ⅱ号矿体是我国迄今为止所发现的最大一条单脉型矿体。根据各种脉体之间的相互穿插关系,可将成矿作用大致划分为3个阶段:第Ⅰ阶段为矿前期梳状乳白色石英脉;第Ⅱ阶段为成矿期多金属硫化物和菱铁矿石英脉;第Ⅲ阶段为矿后期杂色隐晶质石英脉.有些学者认为乳山金矿床是由花岗岩岩浆期后中温热液作用形成的。本文研究表明该矿床属大气降水成因。
The Rushan gold deposit is located in the biotite monzogranite of the Kunyu Mountain complex granite in the Jiaodong area and belongs to the quartz vein type. The Ⅱ ore body is the largest single-vein type ore body discovered to date in our country. According to the interpenetration relationship among various veins, the mineralization can be roughly divided into three stages: the first stage is the milky milky quartz vein at the pre-mine stage; the second stage is the metallogenetic polymetallic sulphide and siderite Quartz veins, Stage III is the varicoloured cryptocrystalline quartz veins at the late stage of ore mines, and some scholars believe that the Rushan gold deposit is formed by the mid-temperature hydrothermal fluids after granite magmatic stage. The study shows that the deposit belongs to the genesis of atmospheric precipitation.