Constraints of Pyrite Geochemical Characteristics on the Genesis of Jinchangliang Gold Deposit

内蒙古敖汉旗金厂梁金矿位于华北地台北缘燕辽成矿带内，是金厂沟梁金矿田的一部分。成矿期黄铁矿呈胶状、细粒状结构、碎裂结构，与黄铜矿、闪锌矿和方铅矿共生。对成矿期中的黄铁矿进行电子探针测试分析，结果证明S/Fe (1.95~1.99)均小于2.0，属于内生亏硫型；黄铁矿属热液成因，微量元素标型特征显示该金矿床为岩浆热液型矿床，黄铁矿是主要的载金矿物，Au的赋存状态是以纳米金的形式存在。 Jinchangliang gold deposit in Aohanqi, Inner Mongolia is located in the Yanliao metallogenic belt on the northern margin of the North China Platform, is part of the Jinchanggouliang gold field. Symbiosis of pyrite and chalcopyrite, sphalerite and galena in mineralization period was gelatinous, fine-grained structure, fragmented structure. The result of electron microprobe analysis of pyrite in ore-forming period shows that S/Fe (1.95 - 1.99) is less than 2, belonging to endogenous sulfur deficient type; the pyrite has a close relationship with hydrothermal. The typomorphic characteristics of trace elements indicate that the gold deposit is magmatic hydrothermal deposit, pyrite is the main gold bearing mineral, and the occurrence of Au exists in the form of nanoparticles gold.