西藏浪卡子也金嘎波金矿地球化学异常特征及勘查标志

Geochemical anomaly characteristics and prospecting indicators of the Yejin'gabo gold deposit in Langkazi County of Tibet

也金嘎波金矿位于冈底斯成矿带上。该矿是在区域化探发现Au、As、Ag等多元素组合异常的基础上,通过矿点检查、异常查证和地质普查等工作新发现的、具较大规模的热液型金矿床。Au元素为区域、矿区成矿指示元素,伴生元素有W、As、Sb、Ag、Bi、Pb、Hg、Mo等。金矿体受构造—岩浆岩带控制,围岩蚀变主要为硅化、绢云母化、碳酸盐化、高岭土化。该金矿床的发现对在高寒山区应用地球化学方法寻找新的金矿具有指导意义。

The Yejin＇gabo gold deposit is located in the Gangdise metallogenic belt. It is a large hydrothermal gold deposit,newly discovered by ore spot inspection,anomaly verification and geological reconnaissance based on regional composite gold,arsenic and silver anomalies. The gold element is a metallogenic indicator at a regional and mine scale,associated with W,As,Sb,Ag,Bi,Pb,Hg and Mo elements. The gold orebodies show a control by tectonic magmatic rock belt,and the wall rock alteration is dominated by silicification,sericitization,carbonation and kaolinitization. The study of the geochemical anomaly characteristics and prospecting indicators of this kind of deposits therefore has guiding significance for prospecting new gold deposits in alpine landscape areas.