甘肃省西和县三洋坝金矿矿石特征及金的赋存状态

Gold Ore Dam Characteristics and Au′s Occurrence of the Sanyangba Gold Diposit in Gansu Xihe

文章主要对三洋坝金矿矿石特征及金的赋存状态进行了论述,表明三洋坝金矿矿石类型为少硫化物蚀变岩型金矿石及少硫化物碳酸盐石英脉型金矿石,矿石构造简单,以浸染状构造为主,主要的矿石结构有角粒状、麦粒状结构、自形-它形细粒结构、自形粒状结构等。矿石中矿物组成比较简单。自然金主要赋存在少硫化物蚀变岩型金矿石中,自然金分布不均匀。自然金的赋存状态有三种类型:粒间金、包裹金和裂隙金,以粒间金为主,包裹金和裂隙金很少。

The main features of the Sanyangba gold and gold ore occurrences are discussed,indicating that the gold ore types is low altered rock type gold sulfide ore and low sulfide carbonate quartz vein type gold ore,ore structure is simple,with disseminated construct dominated,the main ore structure is angular grains,wheat granular structure,idiomophic-allotriomorphic fine granular,idiomophic granular structures.Mineral composition of the ore is relatively simple.There is less natural sulfide deposits are mainly conferred altered rock type gold ore,the uneven distribution of natural gold.Occurrence of native gold,there are three occurance types： intergranular gold,gold wrapped or in fissures,with intergranular gold dominated.