【摘要】 安徽南陵姚家岭锌金多金属矿床中金矿物以独立矿物自然金为主,伴有少量银金矿。自然金粒度集中在10～74μm,形态为角粒状、长粒状、枝丫状等。自然金主要以包体金、晶隙金、裂隙金赋存于黄铜矿、黄铁矿、闪锌矿、方解石等。利用计数颗粒统计和面积统计两种方法分别对金矿物进行形态、粒度、存在状态的特征统计,显示不同类型金矿物在出现率和面积配分特征上有较大差别。通过金的配分计算,粒间金和裂隙金占总金量的53.49%,包体金主要载体为黄铜矿,其次为黄铁矿、闪锌矿、方铅矿及少量脉石矿物,金回收率最高达61.98%。化学成分中普遍存在Fe、Cu、Zn、Te、Bi。成色为682.5～960.1,平均855.5,结合Au、Ag含量与温度的关系,显示金矿物形成于中温中深成成矿环境。更多还原

【Abstract】 The main gold mineral in Nanling Yaojialing gold deposit is single native, together with minor electrum. The gold minerals are commonly angular granular, long granular, branches-like, with grain size in the range of 10～74 um in diameter. They occur mainly in gold bearing minerals such as chalcopyrite, pyrite,sphalerite and calcite, in the form of inclusion gold, intercrystalline gold and fissure gold. The authors made statistical analysis of the shapes, grain sizes and modes of occurrence of gold minerals by using quantity statistical method and area statistical method, and the results indicate that different gold minerals show remarkable differences in occurrence rate and distribution. Gold-bearing minerals generally contain iron,copper, zinc, tellurium and bismuth. Through the distribution calculation of gold, it can be inferred that intercrystalline gold and fissure gold account for 53.49% of total amount of gold, the main inclusions gold bearing mineral is chalcopyrite, followed by pyrite, sphalerite, galena, and a small amount of gangue mineral.The gold recovery rate was up to 61.98%. The average gold fineness ranges from 682.5～960.1 with an average of 855.5. Combined with the relationship between the temperature and the Au-Ag content, the gold minerals formed in an medium temperature and during-deep deposition environment.更多还原