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作 者:王佳奇 韩久会 WANG Jiaqi;HAN Jiuhui(Tianjin Geophysical Exploration Center,Tianjin 300170,China;Inner Mongolia Coal Construction Engineering(Group)Co.,Hohhot 010010,Inner Mongolia Autonomous Region,China)
机构地区:[1]天津市地球物理勘探中心,天津300170 [2]内蒙古煤炭建设工程(集团)总公司,呼和浩特010010
出 处:《地质找矿论丛》2025年第1期27-32,共6页Contributions to Geology and Mineral Resources Research
摘 要:内蒙古自治区别鲁乌铜矿外围矿区东北部发现一岩浆热液型金矿床。本文通过野外勘探工作,结合标本观测、光薄片鉴定、化学成分分析等方法,查明矿区东北部金矿带主要为石英脉型金矿石,赋存于晚石炭系本巴图组绢云千枚岩中,矿石以定向构造、块状构造为主。载金矿物以硅化石英为主,黄铁矿次之,黄铁矿向浅地表氧化为褐铁矿;自然金呈独立金赋存状态,与其他金属矿物无明显接触;以裂隙金为主(80%)、粒间金次之(20%),粒径0.002~0.05 mm,微粒金(≤0.01 mm)占75%,总体属微(细)粒金。金矿形成过程按矿脉相互穿插关系、矿物共生组合及围岩类型分为气成热液期、热液期、表生期,成矿作用以热液期为主,热液期可分为3个阶段:石英硫化物阶段、金石英硫化物阶段、碳酸盐阶段。In surrounding(northeast)of Bieluwu Cu deposit occurs a magmatic hydrothermal Au deposit.Field investigation,samples and thin section observation of the Au deposit were carried out.It is a quartz vein type Au deposit occurring in sercite phyllite of Late Carboniferous Benbatu formation with directional and massive structure.The gold carrier is silicifified quartz,then pyrite.The pyrite is oxidized to limonite upward surface.Native gold occur indepently without evedent contact with other metal minerals.80 percent of the gold is fissur gold,20 percent interganular gold.On the whole the gold is fine to micro-grained gold,0.002~0.05 mm and 75%less than or equal to 0.01 mm.According to cutting relationship of gold veins,paragenesis of minerals and enclosing rock types the gold metallogenic process includes quartz-sulfide stage,gold-quartz-sulfide stage and carbonate stage and two epoches,i.e.the main pneumatogetic hydrothermal epoch and sepergene epoch.
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