吉林六批叶沟金矿石及金矿物特征研究

CHARACTERISTIC OF GOLD ORE AND MINERALS IN THE LIUPIYEGOU GOLD DEPOSIT, JILIN PROVINCE

六批叶沟金矿石属少硫化物类型,金属矿物主要是黄铁矿,脉石矿物以石英、绿泥石、长石、绢云母为主;矿石常具晶质结构、压碎结构、交代结构以及浸染状、角砾状、细脉网脉状等构造。金矿物以银金矿、含银自然金为主,其形态以不规则状、尖角粒状、角粒状等居多,以中—细粒者常见;嵌布状态以粒间金为主,其次是包裹金和裂隙金。自然金中除Ag含量较高外,尚含有少量的Fe、Ni、Co、Cu、S等杂质,其成色为769 4‰,属自然元素类金-银系列矿物。

The gold ores in the Liupiyegou deposit, Jilin province is a lower sulfide type. Metal minerals are mainly pyrite, and less sphalerite, galena, and chalcopyrite. The gangue minerals are mainly quartz, chlorite, feldspar, and sericite. The useful elements are Au and Ag with Au/Ag of 0.37. The content of harmful impurity such as As, Sb, and C is lower. The ores are always crystalloid, crushed, metasomatic frame, and disseminated, brecciated, veinlet-netted structure. The electrum and silver-bearing nature gold are the principal gold minerals. Shapes of gold minerals are mostly irregular, sharp-angled grain, and granular with middle to fine granule. Gold minerals among grains are principal in the enchasing status, the others exist in enclosure and fracture. Natural gold minerals with quality of 769.4‰ have little impurity of Fe, Ni, Co, Cu, S, except higher Ag, and belong to the gold-silver mineral type of the natural elements.