摘要
隐爆角砾岩型金矿是国内外一种具有重要经济价值的矿床类型。不同类型隐爆角砾岩是该类金矿最主要的容矿围岩。造成隐爆作用发生最直接的因素是受热的多源流体或气体 ,岩浆隐蔽爆破主要作用方式是气爆和浆爆 ,其次是热液注入。通常气爆发生于早期 ,浆爆较晚 ,而热液注入最晚。浅成 超浅成中酸性斑岩体是隐爆角砾岩形成的决定性因素 ,气液的隐蔽爆破作用是隐爆角砾岩及角砾岩型金 多金属矿床形成的内因 ,成岩与成矿是同一地质作用过程不同阶段的产物。不同级别的构造对该类型金矿床的产出空间、矿化类型和矿体形态等具有分级控制作用 ,矿化、蚀变存在明显的垂向分带及其空间套叠。该类型金矿可划分为Au Ag和Au Cu系列 ,矿床系列。
Cryptoexplosion breccia type gold deposit is one type of deposits which has great economic value in China and aboard.Different cryptoexplosion breccia is the host rock of the gold deposit. The direct reason of the cryptoexplosion is the polyphyly liquid or gas that is heated. The main magmatic cryptoexplosion is gas or magma explosion, next is hydrothermal. Usually gas explosion occuered in early period, next is magma explosion and hydrotnermal is the latest. Hypabyssal superhypabyssal intermediate acidic intrusive rocks is the determinative factor of the former of cryptoexplosion breccia.The cryptoexplosion of gas and liquid is internal cause of cryptoexplosion breccia type and breccia type gold polymetallic deposits, lithogenesis and mineralization were the products of the same geological process of different stage. Different class structure controlled the space of gold deposit output,types of mineralization and ore pattern, mineralization and alteralition had obvious vertical zoning and telescoping in space. This type of gold deposit can be divided into Au Ag and Au Cu series, the deposit series, the scale of deposit and gold rich position can be judged by series quota.
出处
《黄金地质》
2002年第2期1-7,共7页
Gold Geology
