河南省嵩县南沟金(萤石)矿床地质特征及找矿前景

Geological Characteristics and Prospecting Prospect of Gold(Fluorite)Deposit in Nangou,Songxian,Henan Province

南沟金(萤石)矿床位于华北板块南缘,秦岭造山带北秦岭构造亚东的东段,马超营区域性脆韧性断层的北侧.成矿受太古界太华群地层、基底背斜构造和断层(环形构造近EW向及NW向断裂构造)及燕山期晚期岩浆侵入活动作用等三重地质要素的控制.成矿物质来源多样,如燕山期晚期花岗岩体、太古界太华群地层.金矿石铅、硫同位素测试结果表明,成矿流体来自地壳深部或上地幔.该矿床大地构造成矿环境、赋矿围岩特征、控矿构造及岩浆岩条件等矿化特征均与造山型金矿相似,成矿作用多样(火山喷流沉积、变质作用改造,岩浆热液作用交代等),矿床成因为叠生复合造山型金(萤石)矿.

The Nangou gold(fluorite)deposit is located in the north side of the brittle ductile fault in Machaoying region,the eastern part of the Yadong of the north Qinling structure,the Qinling orogenic belt and the southern margin of the North China plate. The mineralization is controlled by three geological elements:Taihua group strata,basement anticline structure and fault(EW and NW trending faults of ring structure)and magma intrusion in late Yanshanian. The ore-forming materials come from various sources,such as late Yanshanian granite,Taihua group of archean. Lead and sulfur isotope test results of gold ore show that the ore-forming fluid comes from deep crust or upper mantle. The ore-forming environment,host wall rock characteristics,ore-controlling structure and magmatic rock conditions of the deposit are similar to those of orogenic gold deposits,and the ore-forming processes are diverse(volcanic jet deposition,metamorphism transformation,magmatic hydrothermal metasomatism,etc.).