铜陵朝山金矿床矿石特征与金的赋存状态研究  

ORE CHARACTERISTICS AND OCCURRENCE OF GOLD MINERALS IN THE CHAOSHAN GOLD DEPOSIT,TONGLING AREA

作　　者：任云生[1] 刘连登[1] 陈国华[1] 刘良根 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]安徽321地质队,铜陵244031

出　　处：《地质与勘探》2007年第3期60-64,共5页Geology and Exploration

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。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 araenopyrite 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.

关 键 词：矿石特征 铋矿物 夕卡岩型独立金矿床 朝山金矿床 

分 类 号：P618.51[天文地球—矿床学]