水银洞超大型金矿显微-次显微可见金发现的选矿意义  

The processing implication of the discovery of the micron-submicron sized gold particles in the Shuiyindong super-large gold deposit

作　　者：刘建中[1] 苏文超[2] 刘全军[3] 夏勇[2] 杨成富[4] 陈睿[4] 张兴春[2] 张弘弢[2] 

机构地区：[1]贵州省地质矿产勘查开发局105地质大队,贵州贵阳550018 [2]中国科学院地球化学研究所,贵州贵阳55002 [3]昆明理工大学国土资源工程学院,云南昆明650093 [4]贵州大学资源与环境学院,贵州贵阳550003

出　　处：《贵州地质》2011年第3期189-193,共5页Guizhou Geology

基　　金：贵州省地矿局重大科研项目[黔地矿科(2009)11号];贵州省科学技术基金(2100)联合资助

摘　　要：水银洞超大型金矿床金赋存于沿沉积型自形半自形黄铁矿内核生长成的含砷黄铁矿环带中。近来从水银洞金矿床原生富矿石（碳酸盐岩型矿石）中一条含砷黄铁矿细脉中发现100余粒次显微-显微自然金颗粒（0.1~6μm）,通过对金的赋存状态及预氧化提金后尾渣的研究,认为矿石破磨至325目有可能损失部分金和系统中黄铁矿出现过氧化现象,从而导致消耗大量的NaOH而成本偏高。The Shuiyindong super-large gold deposit occurred in the arsenian pyrite zone which grown around the euhedral and semi-euhedral sedimentary pyrite core.Recently,over 100 micron-submicron sized gold particles（0.1～6μm） have been observed in arsenic-bearing pyrite veinlets in the primary ore carbonate type ore） in the Shuiyindong deposit.On the basis of the studies on the gold occurrence state of the primary ore and the tailing,it is suspected that a small part of gold could be lost in the grinding process and the cost of oxidizing gold-bearing arsenian pyrite by NaOH could be much higher than it should be due to the over oxidation of pyrite because the ordinary ore was grinded to less than 325 mesh in size.

关 键 词：超大型 金矿床 显微-次显微 水银洞 贵州 

分 类 号：P618.51[天文地球—矿床学]