山东省焦家金矿的金赋存状态

采用显微镜和扫描电子显微镜研究了山东省焦家金矿的金赋存状态。研究发现,该矿石中载金矿物有黄铁矿、黄铜矿、脉石矿物、闪锌矿和方铅矿。在硫化矿中金粒占77.12%,脉石中金粒占22.88%。金的赋存状态有裂隙金、包裹金和晶隙金,裂隙金占60.28%,包裹金占21.63%,晶隙金占18.09%。金矿物的形态主要有球状、三角形、矩形、条状和不规则形状。焦家金矿石中金矿物的粒度范围较大,大的颗粒达到100μm,小的金颗粒只有3-5μm,其中大于0.104mm粒级的金颗粒占1.50%,0.074～0.104mm粒级的金颗粒占5.26%,0.043～0.074mm粒级的金颗粒占23.31%,0.037～0.043mm粒级的金颗粒占3.76%,小于0.037mm的金颗粒占64.29%。焦家金矿石中金矿物有自然金、银金矿、自然银、含铁自然银、金铜矿和螺硫银矿。其中,银金矿是最重要的金矿物,占71.56%。金银矿物平均成色为641.24‰。

Gold occurrence of Jiaojia gold mine in Shandong province

The microscopy and scanning electronic microscopy (SEM) were used to study the gold occurrence of Jiaojia gold mine, Shandong province. The results show that the gold-bearing minerals are composed of pyrite, chalcopyrite, gangue, sphalerite and galena. 77.12% of gold minerals are the sulphides and 22.88% are the gangues. The gold occurrence is composed of 60.28% fissure gold, 21.63% inclusion gold and 18.09% crystal fractured gold. The morphology of gold mineral is composed of sphere, triangle, rectangle, s...