河南宽坪金矿地质特征及找矿方向

崤山地区具备金成矿的地层、构造、岩浆岩三大有利条件。金矿床类型有石英脉型和构造破碎蚀变岩型。宽坪金矿为构造破碎蚀变岩型,含矿构造带具多期次活动的特征,金矿体严格受构造带控制。热液成矿期可划分为3个阶段:(1)早期石英—黄铁矿阶段；(2)中期石英—多金属硫化物阶段；(3)晚期石英—白云母—硫化物阶段。与金矿化关系密切的围岩蚀变为硅化、黄铁绢英岩化、绿泥石化、绢云母化、钾化等。进一步找矿的有利部位为已知矿化蚀变带深部和燕山期岩浆活动强烈的部位。

Geologic features and prospecting direction of Kuanping gold ore in Shan County, Henan

There are three favorable conditions for gold mineralization in the Xiaoshan district, that is, stratum, structure and magmatic rock. The types of gold deposit are quartz vein type and structure-fractured altered rock type, and the Kuanping gold ore is the latter one. The gold ore body is strictly controlled by structural belt featured by multi-periodic activities. The hydrothermal metallogenic epoch can be divided into three stages:(1) early quartz-pyrite stage; (2) intermediate quartz-polymetallic sulphide stage; (3) late quartz-muscovite-sulfide stage. The wall-rock alteration closely associated with gold mineralization includes silicification, beresitization, chloritization, sericitization, potassic alteration, etc. The favorable places for further prospecting are:(1) the depth of known mineralized alteration zones; (2) the areas where the Yanshanian activities are intensive.