【摘要】 朝山金矿的主要矿石类型为含金硫铁矿石,矿石中富含铋矿物,且作为主要载金矿物,是该矿床的标型特征和重要找矿标志。矿石多呈结晶粒状结构、各种充填-交代结构,块状、浸染状、细脉状构造。金矿物以形态复杂的微粒、细粒自然金、银金矿、金银矿为主,赋存形式有晶隙金、包体金、连生金、裂隙金,载金矿物为石英、自然铋、辉铋矿、磁黄铁矿、黄铁矿、黄铜矿、毒砂等。综合分析认为:该矿床是典型的夕卡岩型独立金矿,成矿流体的不混溶是金富集成矿的主因。更多还原

【Abstract】 Studies of both field and ore microscopy indicate that the gold-bearing sulfide ore is major gold ore type in the Chaoshan gold deposit.Bismuth mineral,one of major gold-carrying minerals,has a typomorphic significant and an important clue for prospecting of Chaoshan deposit.Ore textures mainly include crystalline-granular and filling-metasomatic textures with various shapes.Ore structures are dominantly massive,disseminated and veinlet.Fine-grain native gold and electrum occur in the major gold-carrying minerals like quartz,native bismuth,bismuthinite,pyrrhotite,pyrite,chalcopyrite and arsenopyrite at the state of interlocking,inter-granular,crevice and enclosure.Characteristics of gold ore bodies,wallrock alteration as well as fluid inclusions indicate that Chaoshan gold deposit is a typical skarn gold-only deposit.Phase separation of ore-forming fluids played an important role in the metallogenetic process.更多还原