河南省洛宁县三官庙金矿床构造控矿特征

Characteristics of Structure and Control of Ore in the Sanguanmiao Gold Deposit,Luoning County,Henan Province

三官庙金矿位于太华群与熊耳群接触带附近的似斑状花岗岩体南侧,矿床明显受断裂构造控制。矿区内拆离断裂带和层间滑脱断裂蚀变带发育,含金蚀变破碎带中的构造岩石为含矿主岩。矿体形态以较稳定的似层状为主,金矿物为银金矿等;金的载体矿物为黄铁矿、石英和方铅矿。围岩蚀变为硅化、黄铁矿化、方铅矿化、绿泥石化和绢云母化等,矿化类型属蚀变岩型金矿。在多期次强烈构造-岩浆活动、区域变质和混合岩化作用过程中,Au元素得以沿层间滑脱断裂蚀变带富集成矿。

Sanguanmiao gold deposit located in the south of porphyritic granite near the contact zone of the Taihua group and Xiong＇er Group.Detachment fault zones and alteration zones of interlayer slip fault developed in the mining area.The rock structure in the fracture zone of alteration containing gold is main ore-bearing rock.The form of ore bodies is mainly stable layered.Gold minerals is mainly Silver Gold mine.Carrier minerals of gold are pyrite,quartz,and galena.Wall rock alteration is silicification,pyrite,galena,chloritization,sericitization,and so on.Mineralization type is silicified altered rock type gold mine.In the multi-stage intense tectonic-magmatism,regional metamorphism and migmatization processes,the gold element can form ore body along the alteration zone of interlayer slip faults.