摘要
大兴安岭北部是我国重要的金成矿区之一。区内13处岩金矿床(点)均与中生代岩浆活动有关,形成于中生代(晚侏罗世—早白垩世)。金矿床(点)具有NE成带,NW成行的分布特征。EW、SN和NE向断裂是主要的容矿构造,多组断裂的交汇处是矿化的有利部位。根据区域成矿特点及成矿条件可划分出3种矿床类型,即蚀变岩型、石英脉型和隐爆角砾岩型。成矿物质以深源为主,有部分地壳物质的加入;成矿溶液是岩浆热液和大气降水的混合流体;成矿温度为200～300℃,属中低温热液型金矿床。
The northern Daxing'anling is one of the main gold mineralization areas in China. The 13 gold deposits (points) are all related with the Mesozoic era magmatic activity and formed in Mesozoic era (Upper Jurassic to Lower Cretaceous). The distribution feature of gold deposits is zone in NE and row in NW. The EW, SN and NE strike fault are the major host structure, and the junction of several faults is the favored place for mineralization. Three types could be marked off according the regional metallogenic features and metallogenic condition, that is altered rock type, quartz vein type and cryptoexplosive breccia type. The minerogenic matters are mainly from deep and add in part crust matter, the mineralizing solution is the mixed fluid of magma hydrothermal and atmospheric water, the mineralizing temperature is (200～300 ℃) and is the low to moderate temperature hydrothermal type gold deposit.
出处
《黄金地质》
2004年第2期50-54,共5页
Gold Geology
关键词
金矿床
矿床类型
地质特征
大兴安岭北部
gold deposit
industrial type of ore deposit
geological feature
northern Daxing'anling
