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蚀变花岗岩型锡-铜矿化是个旧矿区的一种新资源类型,其分布广,找矿潜力巨大。对这类矿化地质特征、花岗岩岩石学、蚀变分带、地球化学等进行总结与研究,认为其成矿作用与燕山期花岗岩浆期后热液密切相关,成矿物质来源以燕山期花岗岩为主,具多源性,钾化、硅化与萤石化组合是蚀变花岗岩型矿化的重要蚀变和找矿标志,矿化的产出受花岗岩岩体形态的控制,老卡岩体顶部及边部为该类型矿化重点找矿靶区。应用地球化学方法区分蚀变、矿化和成矿元素异常范围,可以缩小工作靶区,从而扩大个旧东区蚀变花岗岩型锡-铜多金属矿找矿效果。
Alteration of granite type tin - copper mineralization is a new type of old mining resources, its wide distribution, a huge potential for prospecting. This type of mineralization geology, granite petrology, alteration zoning and geochemistry are summarized and studied. It is concluded that the mineralization is closely related to the hydrothermal fluids after the Yanshanian granite magmatic stage. The source of ore-forming materials is Yanshanian granite The combination of multi-source, potassium, silicification and fluorite is an important alteration and prospecting indicator for alteration granite-type mineralization. The mineralization output is controlled by the granite rock mass morphology. The top of the rock mass And the edge of the focus of the type of mineralization prospecting target area. The application of geochemical methods to distinguish alteration, mineralization and the anomalous range of ore-forming elements can narrow the working target area and thus extend the ore-prospecting effect of the alteration granite-type tin-copper polymetallic deposit in Gejiu Eastern Region.