黔西南微细粒浸染型金矿床赋矿地层中常含有一定量的有机质。矿石和赋矿岩石有机碳含量可达 1%左右。其中镜质组和热变沥青的反射率的变化范围为 1.5 %～ 4 .5 % ,但多在 2 %～ 3%之间。烂泥沟金矿矿石中的镜质体和热变沥青的反射率一般略大于赋矿围岩 ,表明成矿热液对赋矿地层 Qianxinan fine-grained disseminated gold deposits often contain a certain amount of organic matter in the strata. Ore and ore rock organic carbon content up to about 1%. Reflectance of vitrinite and heat-modified bitumen varied from 1.5% to 4.5%, but more than 2% to 3%. The reflectance of vitrinite and heat-modified bitumen in the Lannigou gold ores is generally slightly larger than that of the ore-hosting rocks, indicating that the ore-forming hydrothermal fluid