云南广南县格乍金矿矿特征及成因分析

THE FEATURE AND GENESIS ANALYSIS OF GEZHA AU DEPOSIT IN GUANGNAN,YUNNAN

云南广南县格乍金矿主要受矿区F_1、F_3两条北西向展布的断层构造带夹持和控制,主要矿体赋存于下泥盆统坡松冲组上段(D)_1ps^2泥质粉砂岩之层间构造破碎带中,矿化蚀变主要有硅化、黄铁矿化、毒砂化、锑矿化,局部见臭葱石化。矿床成因属中-低温热液或热水溶液充填-交代微细粒浸染型金矿床。

Gezha Au deposit in Guangnan,Yunnan is mainly sandwiched between and controlled by 2 NW fault structure zones in the orefield.The main orebody is in the interbed fracture zone of Lower Devonian Posongchong Formation Upper Member(D1ps^2)muddy siltstone.The main metallogenesis alterations are silisification,pyritization,arsenopiritization,Sb metallogenesis,locally scoroditization.It is a middle-low T hydrothermal or heat water solution filling-metasomatism micro fine grained disseminated Au deposit.