紫金山铜金矿床Ⅺ号铜矿带流体包裹体研究  

Fluid inclusion study of No.Ⅺ copper ore zone in Zijinshan Cu-Au Deposit

作　　者：黄宏祥[1] 王少怀[1] 

机构地区：[1]福州大学紫金矿业学院,福州350116

出　　处：《有色金属（矿山部分）》2016年第1期44-51,共8页NONFERROUS METALS(Mining Section）

基　　金：国家自然科学基金资助项目(41172041)

摘　　要：紫金山铜金矿床Ⅺ号铜矿带位于矿床的深部,是探讨矿床深部是否有斑岩型矿床找矿潜力的理想区段。在资料收集、详细岩矿鉴定的基础上,对Ⅺ号铜矿带主成矿阶段与铜蓝、蓝辉铜矿等密切共生的石英开展了流体包裹体的岩相学观察、显微测温和激光拉曼光谱分析。结果表明,Ⅺ号铜矿带主要发育液相、气相、CO_2和含子矿物多相包裹体;均一温度集中于200~260℃和300~360℃,盐度介于0.35%~33.40%NaCl eqv;包裹体成分主要为H_2O、CO_2、NaCl、CO_3^(2-),成矿流体属于NaCl-H_2O-CO_2体系。综合分析发现,Ⅺ号铜矿带成矿流体同时具有高硫化型浅成低温热液矿床和斑岩型矿床的特征。因而判断Ⅺ号铜矿带为高硫化型浅成低温热液矿床和斑岩型矿床的叠加部位,紫金山铜金矿床为高硫化型浅成低温热液—斑岩型铜金矿床,在其深部有寻找斑岩型矿床的广阔前景。No. XI copper ore zone, which locates at deep Zijinshan Cu-Au Deposit, is an ideal zone for discus- sing if there is prospecting potential of porphyry ore body under the deposit. Based on data collection and detailed rock-mineral identification, fluid inclusions are studied by petrography, microscopic temperature measurement and laser Raman spectrum analysis, which are contained in quartzes accreted with covellite, digenite et al during main mineralizing stages of No. XI copper ore zone. The results show that fluid inclusions can be classified into four types of liquid inclusion, gaseous inclusion, COz inclusion and mineral-bearing inclusion. The homogenization tempera- tures concentrate in 200～260℃ and 300～360℃, while the salinities range from 0.35% to 33.40% NaCI eqv. The components of these inclusions mainly consist of H20, CO2, NaC1 and CO_3（2-） , which belong to NaC1-H2O-CO2 system. Comprehensive analysis indicates the features of metallogenic fluid are similar to high sulfidation epithermal deposit and porphyry deposit at the same time. So it can be inferred that No. X[ copper ore zone is a area superposed by high sulfidation epithermal deposit and porphyry deposit, and Zijinshan Cu-Au Deposit should belong to high sulfidation epithermal-porphyry Cu-Au deposit. Moreover, there is a great prospecting potential of porphyry depositbelow it.

关 键 词：流体包裹体 高硫化型浅成低温热液—斑岩型铜金矿床 紫金山铜金矿床 

分 类 号：P618.41[天文地球—矿床学]