内蒙古额尔古纳市虎拉林金矿床成矿流体包裹体研究  

FLUID INCLUSION IN THE HULALIN GOLD DEPOSIT,INNER MONGOLIA

作　　者：王晓勇[1] 贾伟光[2] 王献忠[1] 赵炳新[1] 周殿宇[1] 申名国 

机构地区：[1]中国人民武装警察部队黄金第三支队,黑龙江哈尔滨150086 [2]沈阳地质矿产研究所,辽宁沈阳110034

出　　处：《地质与资源》2010年第2期138-143,共6页Geology and Resources

摘　　要：通过矿床流体包裹体岩相学、显微测温学和激光拉曼光谱成分分析,研究成矿流体性质,探讨了矿床成因类型.研究结果表明,流体包裹体以气液两相包裹体为主,少量含CO2三相、含子矿物三相和纯气相包裹体等.成矿流体均一温度为320～360℃,盐度为19.2%～21.8%,密度为0.73～0.90g/cm3,估算成矿压力为92.1～129.1MPa,成矿深度为3.07～4.3km.成矿流体气相成分以H2O为主,其次为CO2、CH4和N2,微量的C6H6、C2H6和C3H8等,总体属H2O-CO2-NaCl体系.成矿流体是一种不混溶流体,主要来源于深部岩浆,并可能有幔源组分参与.金主要是以金氯配合物的形式迁移.矿床的地质-地球化学特征与隐爆角砾岩型金矿类似,应属隐爆角砾岩型金矿床.On the basis of the results from the inclusion petrofacies,micro-thermometry and laser Raman spectrographic analysis,the ore-forming fluid characters are systematically studied,and the genesis of the Hulalin gold deposit is discussed.The results show that these inclusions consist of mainly gas-liquid two-phase,with minor CO2-bearing three-phase,daughter mineral-bearing three-phase and pure CO2 types.The homogenization temperature of ore-forming fluids ranges from 320 to 360 ℃,with salinity（NaCl）of 19.2%-21.8%,and density of 0.73-0.90 g/cm3.The estimated mineralizing pressure is between 92.1 and 129.1 MPa,with mineralizing depth of 3.07-4.3 km.The gas composition of ore-forming fluids is mainly H2O,followed by CO2,CH4and N2,with less C6H6,C2H6 and C3H8,belonging to H2O-CO2-NaCl system.The ore-forming fluids are unmixed,mainly from the deep magmas and maybe joined with mantle components.The gold is transferred mainly in the form of gold-chlorine complex.The geological and geochemical features of the deposit are similar to those of cryptoexplosion breccia gold deposits.So it can be assigned to the cryptoexplosion breccia type.

关 键 词：金矿床 成矿流体 流体包裹体 虎拉林 内蒙古额尔古纳市 

分 类 号：P618.51[天文地球—矿床学] P575.4[天文地球—地质学]