摘要
浅成脉状金矿是指在近地在至１．５ｋｍ深度，以充填方式形成，总体形状呈脉状金矿床。其赋矿围岩是多种多样的，以火山岩、次火山岩、浅侵入体最为常见，此外还有变质岩等。热液矿床的形成深度对矿体形状、产状、规模、物质组成和结构构造有重要影响。浅成脉状金矿是我国仅次于中深脉状金矿的第二个重要类型。介绍了浅成脉状金矿的地质特征及进一步分类的方案。
Hypabyssal and untrahypabyssal vein gold deposit are formed in the place0～1.5 km beneath the ground.Its host rocks are various types such as volcanic rocks,subvolcanic rocks,sedimentary rocks, metamorphic rocks,et al.The authors wotildrather use the concept of hypabyssal vein gold deposit than volcanic type gold deposit,because the former is direct and practical for exploration of hypabyssal deposit.Meanwhile, it is the deepth of ore deposit formation control the ore body shapeocctlrrence, scale, composition,structure,texture. Therefore it is important to studythis type of gold deposit. This paper introduces some characteristics and schemes ofhypabyssal vein gold deposit.The gold deposit can be divided into three types,accordingto the ratio of Au :Ag,i.e. Au-Te type,Au-type,Au-Ag type. According togangue mineral compositions,linseite-sericite type and quartz-alunite type can be setup.To the gold deposit beared in volcanic hostrocks, three types,the calc-alkalic rocktype,the alkalic rock type and sub-alkalic rock type can be divided.
关键词
金矿床
矿化
火山岩
分类
hypabyssal and untrahyabyssal gold deposit,deepth,volcanc rocks
