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.
出处
《地质与资源》
CAS
2010年第2期138-143,共6页
Geology and Resources
