内蒙古哈达门沟金矿床地球化学特征及成因分析

哈达门沟金矿位于华北克拉通北缘西段。金矿体主要产于新太古界乌拉山群变质岩中。主要矿石类型包括含金石英脉、含金石英—钾长石脉、含金钾化蚀变岩等。金矿化与钾化关系密切。通过对矿床的地质、地球化学等特征的综合研究分析,认为成矿物质来自印支期岩浆和乌拉山群变质岩的混合。成矿流体来自岩浆水和部分变质水。成矿时代主要发生在印支期。印支期的岩浆活动直接导致了成矿物质的活化、迁移和沉淀。

Geochemical charateristics and genesis of Hadamengou gold deposit in Inner Mongolia

The Hadamengou gold deposit is located in the western segment of the northern margin of North China Craton (NCC). It is hosted by Archean metamorphic rocks of the Wulashan Group. The main ore types include gold-bearing quartz vein type, gold-bearing quartz-potassic feldspar vein type and gold-bearing altered rock type. Gold mineralization is closely related to K-feldspathization. Based on the integrated study of geological, geochemical, geophysical and other features of the deposit, it is inferred that metallogenic materials are mainly supplied by magmatic rocks and strata of Archean Wulashan Group, and ore-forming fluids are dominated by magmatic hydrothermal fluid mixed with minor meteoric water. The gold mineralization was mainly formed during the Early Indosinian tectonic movement, which drove ore-forming fluids to the favorable depositional environment.