摘要
鄂东南徐家山金矿田产于志留系(含碳)碎屑岩地层中。矿田内断裂构造发育,可分为近东西向、北东向、北西向和近南北向4组。近东西向断裂是区域构造的基础,是主要的导矿构造;北东向和北西向断裂控制了晚期岩脉及金矿体的分布,也是主要的储矿构造。主成矿期的流体为低—中等盐度、低密度流体,属酸性、弱还原环境,成矿压力为44.270～47.948MPa,属地壳浅层次成矿。矿区内与成矿有关的石英包裹体中的水均属大气降水(地下水),岩浆活动提供了部分矿质和热源。矿田内的金矿床为中低温热液型金矿床。
Xujiashan gold orefield,located in the Silurian Carboniferous clastic rocks,has been newly discovered recently in Southeastern Hubei Province.In this gold orefield,faults are developed and can be divided into 4 groups trending respectively nearly EW,NE,NW and nearly SN.Amony them,the near EWtrending faults,the basis of the regional tectonics,are the maior oreforming structures while the NE and NWtrending faults are structures controlling the later veins and gold ore bodies.The fluid in master metallogenic epoch is characterized by lowmedium salinity and low density.The metallogenesis occurred in the shallow crust of acidicweak reductive environment with metallogenic pressures varying from 44.270 to 47.948 MPa. The inclusion water in the deposit comes from meteorological water or ground water while magmatic activities provide part of mineral and heat sources.It is concluded that the gold deposits in Xujiashan gold orefield are 'mediumlow temperature hydrothermal gold deposits'.
出处
《地质科技情报》
CAS
CSCD
北大核心
2003年第2期82-86,共5页
Geological Science and Technology Information
基金
湖北地勘局科技发展基金资助项目
