【摘要】 通过对宝兴厂无矿化斑状花岗岩石英斑晶和煌斑岩石英脉、矿化阶段辉钼矿石英脉、黄铜矿-辉钼矿石英脉、黄铁矿-辉钼矿石英脉、黄铜矿-黄铁矿石英脉以及黄铁矿石英脉中流体包裹体岩相学、包裹体显微测温分析及包裹体成分的激光拉曼光谱分析.结果显示石英斑晶和石英脉原生包裹体中发育富气相包裹体和富液相包裹体2种类型.流体包裹体以中高温（a.v.250.7℃^>450℃）,中盐度（a.v.6.65%¹0.78%NaCl.eqv）为特征,但是无矿化的石英流体包裹体温度和盐度较矿化阶段石英流体包裹体要高.矿化阶段的成矿流体捕获压力（3.90¹3.4 MPa）及成矿深度（0.53¹.30 km）均显示该矿床形成于浅成的环境,与斑岩成矿系统一致.激光拉曼光谱分析表明,石英中流体包裹体的气相组分以水蒸汽为主,伴有少量的CO₂,液相成分中主要富含Na⁺和Cl^-成矿流体,总体上属于NaCl-H₂O体系.综上所述,宝兴厂斑岩型铜钼多金属矿床流体包裹体特征与多阶段侵入体相关,暗示其成岩主要与金沙江—哀牢山一带岩浆作用有关,流体包裹体均一温度、盐度和流体成分的测试数据,代表着早期岩浆流体出溶与晚期对流循环的大气降水混合的热液事件.更多还原

【Abstract】 Petrographic observation,microthermometric study and compositional identification using Laser Raman Spectroscope were performed to fluid inclusion in phenocryst quartz of porphyritic granite and quartz vein of lamprophyre with no mineralization,and mineralization stage of molybdenite-quartz vien,chalcopyrite-molybdenite quartz vein,pyrite-molybdenite quartz vien,chalcopyrite-pyrite quartz vien and pyrite-quartz vien in Baoxingchang area.The results show that the primary fluid inclusions in both phenocryst quartz and quartz vein contain liquid type and vapor type.The primary fluid inclusions were attributed to medium-high temperature（a.v.250.7 ℃—>450 ℃） and medium salinity（a.v.6.65%—10.78 wt%NaCl.eqv）,and however,the homogenization temperatures and the salinities of the primary fluid inclusions in no mineralized quartz were higher than mineralized quartz vein.Both the minimum trapping pressure（3.90—13.4 Mpa） and mineralization depth（0.53—1.30 km） of ore-forming fluid at mineralization stage have shown that the deposit was formed in shallow seated environment that was consistent with the porphyry ore-forming system.Based on laser roman spectroscopic analysis of composition,gaseous components of fluid inclusions in quartz mainly of water vapor with a small amount of CO₂ and the liquid composition were Na⁺ and Cl^-,which belong to the NaCl-H₂O inclusions.In summary,it has demonstrated that fluid inclusions in the Baoxingchang Cu-Mo polymetallic deposit associated with multi-stage intrusions along Jinshajiang—Ailaoshan shear zone.Combined with homogenization temperature,salinity and composition of primary fluid inclusions,it has suggested that the hydrothermal of the early magmatic fluid exsolution mixed with meteoric water of the late convective circulation.更多还原