豫西安沟斑岩-爆破角砾岩型钼矿床地质特征

Geological Characteristics of Angou Porphyry-explosion Breccia Molybdenum Deposit in Western Henan Province

安沟钼矿床位于东秦岭-大别山钼成矿带,属斑岩-爆破角砾岩型钼矿床。赋矿围岩为太古界太华群石板沟组(Arsh)片麻岩系。区内断裂构造发育,燕山期中酸性岩浆活动强烈。成矿作用可分为三期五个成矿阶段,石英-硫化物阶段为主要的成矿阶段。硅化、钾长石化、黄铁矿化、碳酸盐化、重晶石化、矽卡岩化与成矿关系密切。爆破角砾岩体是很好的找矿标志,燕山期花岗岩内外接触带是重点找矿部位。

Angou molybdenum deposit is located in Qingling-Dabie Mountain Mineralization belt, designated as the porphyry-explosion breccia type molybdenum deposit. The ore bearing rocks are gneiss in Shibangou formation Taihua group, Archaeozoic erathem （Arsh）.In this region, fault structure is developed , neutral-acidic magma of Yanshan period activity was strong. The mineralization can be divided into three periods and five stages. The main one is Quartz-sulfide stage. Potash feldspathization, silicification, pyritization, carbonation, barite, skarn had a close relationship with the mineralization. The blasting breccia is a good sign for prospecting, inside and outside contact zone of granite of Yanshan period is the key prospecting area.