皖东地区毛山金矿蚀变矿物特征及其地质意义

毛山金矿属于中小规模金矿山。通过对矿体两侧的黄铁绢英岩进行热分析与透射电镜观察研究以及对绢云母的热分析及其化学成分研究，认为水热蚀变、硅化及矿化程度均较高，成矿热液可能来自矿区南部和深部，该地区是寻找隐伏矿体的靶区。黄铁绢英岩中出现微细石膏，反映在成矿过程中可能出现过氧化阶段，是出现富矿的显示。进而提出乳白色石英脉中出现石膏晶体是寻找金矿化的新的找矿标志。

CHARACTERISTICS AND SIGNIFICANCE OF ALTERED MINERALS IN MAOSHAN GOLD DEPOSIT, EAST ANHUI PROVINCE

Maoshan gold deposit with small-middle scale mineralization is situated in east Anhui province. This paper deals with DTA and TG of alterative rocks and sericite, chemical composition of sericite as will as TEM of gypsum. The research results show that the degrees of hydrothermal alteration, silicification and mineralization are higher, and the prospecting target is located in the south part and the deep district. In particular, gypsum, which was formed at the mineralizing stage and observed by TEM, in opal quartz vein which is considered to be barren quartz vein before is a new typomorphic feature of rich gold ores.