摘要
丰山大型铜矿床主要是由接触交代作用形成的 ,产于燕山期超浅成花岗闪长斑岩体与三叠系碳酸盐岩地层的接触带附近。而热液脉型与隐爆角砾岩型金银多金属矿化则产于其外侧的大理岩中 ,矿 (化 )体受隐爆角砾岩系、断裂和层间破碎带控制 ,金平均品位约 3× 10 - 6 ～ 6× 10 - 6 。经用人工重砂、电子探针、电镜和化学分析等方法对金银的赋存状态进行研究 ,金呈显微—次显微状分布于一些硫化物的边缘或包裹于黄铁矿。
Fengshan Cu deposit was mainly formed by contact metasomatism ,occurring in contact zone between super hypabyssal granodiorite super porphyry body of Yanshan and carbonate formatinon of Triassic system.In marble outer of the contact zone, there is gold mineralizaion of hydro thermal vein type and cryptoexplosion breccia type. Orebody is controlled by crypoexplosion breccias and faults.The mean Au grade is 3×10 -6 ～6×10 -6 . By some means such as electron microprobe,electron microscope,man made heavy placer minerals and chemical analysis,the occurring states of Au and Ag are studied.Gold occurs as microgold and submicrogold ,the gold are distributed on margins of some sulfide such as pyrite, chalcopyrite and so on,or enclosed in gold loaded minerals such as pyrite,galenite and so on.
出处
《黄金》
CAS
2003年第6期7-11,共5页
Gold
关键词
金矿化
地质特征
赋存状态
丰山铜矿
湖北阳新
gold mineralization
geologic characteristic
occurring state
Fengshan Cu deposit
Yangxin,Hubei Province
