内蒙古阿根他拉夕卡岩型铁铜矿流体包裹体特征及成矿意义探讨  

Fluid inclusion characteristics and metallogenic significance of Agentala skarn Fe-Cu deposit,Inner Mongolia

作　　者：朱江建[1] 王玉往[1] 肖文进[2] 毛启贵[1] 付王伟 张会琼[1] 高卫红[1] 崔乐乐[1] 

机构地区：[1]北京矿产地质研究院,北京100012 [2]有色金属矿产地质调查中心,北京100012 [3]哈密地区安全生产监督管理局,哈密839000

出　　处：《矿产勘查》2016年第1期101-112,共12页Mineral Exploration

基　　金：国土资源部公益性行业科研专项经费项目(编号:201411026-1);国家科技支撑计划重点项目(编号:2011BAB06B04-03);中国地质调查局地质矿产调查评价专项(编号:12120115022001)联合资助

摘　　要：内蒙古赤峰市阿根他拉铁铜矿目前为小规模开采的夕卡岩型铁矿床。其成矿可分为4个阶段,即成矿前的干夕卡岩化阶段,该阶段以形成各种颜色的石榴子石为特征;成矿期的湿夕卡岩化阶段,该阶段是该区铁矿的主要富集期;成矿期的石英多金属硫化物阶段,该阶段是该区铜矿的主要富集期;最后是成矿后的绿帘石—方解石阶段。统计结果表明,从石英多金属硫化物阶段至绿帘石—方解石阶段,温度具有降低的趋势。石英多金属硫化物阶段的含磁黄铁矿石英脉及含黄铜矿、黄铁矿石英脉,在同一样品中富液相包裹体与富气相包裹体共生且均一温度一致,指示了石英多金属硫化物阶段的流体很可能发生有利于成矿的沸腾作用。The Agentala skarn Fe-Cu deposit is a small scale mining operation iron mine in Chifeng city, Inner Mongolia. The metallogenic stages of the deposit can be divided into four stages. The first stage is pre-mineralization dry skarn stage with different kinds of garnets. The second stage is wet skarn stage which is the main stage of iron ore formation in the Agentala skarn Fe-Cu deposit. The third stage is quartzpolymetallic sulfide stage, which is considered to be the main source of copper ore in the deposit. The fourth stage is post-mineralization epidote- calcite stage. Stastitical result of fluid inclusion study indicates that metallogenic temperature decreases from quartz- polymetallic sulfide stage to epidote-calcite stage. It is found that the homogenization temperature of liquid-rich inclusion and gas-rich inclusion from the same sample collected from pyrropyrite-bearing quartz vein and ehalcopyrite-pyrite-bearing quartz vein formed in quartz polymetallic sulphide stage, is consistent, which indicates that fluids in the quartz polymetallic sulphide stage may be formed in the boiling process which is favorable for the mineralization deposition.

关 键 词：大兴安岭 阿根他拉 夕卡岩型铁铜矿 流体包裹体 内蒙古 

分 类 号：P618.41[天文地球—矿床学]