滇中播卡金矿床流体包裹体研究
发布时间：2018-10-14 19:59
【摘要】：播卡金矿位于滇中元古宇铜多金属成矿带之东川矿集区,矿体呈脉状、网脉状、角砾状产于中元古界昆阳群地层中,受断裂构造控制。本文在详细的矿床地质观察和研究基础上,将本区成矿作用分为3个阶段:第1阶段为石英-黄铁矿阶段,第2阶段为石英-多金属硫化物阶段,第3阶段为石英-碳酸盐阶段。成矿主要集中在第1和第2阶段。本文通过金矿成矿各阶段的流体包裹体的岩相学观察,结合流体包裹体的显微测温、气液相成分分析,讨论了成矿流体的性质、演化过程。研究表明:第1阶段的流体包裹体均一温度在105~368℃,盐度为7.59%~44.32%(NaCleq);第2阶段的流体包裹体均一温度范围在119~294℃,盐度为5.26%~17.87%(NaCleq);第3阶段的流体包裹体均一温度在115~195℃,盐度为4.18%~14.57%(NaCleq)。流体包裹体气相成分以H_2O为主,其次为少量CO_2;液相成分以Na+、Cl-为主,其次为Ca~(2+)、SO_4~(2-),成矿流体主要属于NaCl-H_2O体系。综合矿床地质特征和成矿流体研究,本文认为播卡金矿属于岩浆热液矿床。
[Abstract]:The Xaika gold deposit is located in the Dongchuan ore-gathering area of the Paleo-Proterozoic copper polymetallic metallogenic belt in central Yunnan. The orebody is vein-like, net-like, and breccia occurs in the strata of the Kunyang Group of the Middle Proterozoic, which is controlled by the fault structure. On the basis of detailed geological observation and study of ore deposits, the metallogenic process in this area is divided into three stages: the first stage is the quartz-pyrite stage, the second stage is the quartz-polymetallic sulfide stage. The third stage is quartz-carbonate stage. Mineralization is mainly concentrated in the first and second stages. Based on the petrographic observation of fluid inclusions in various stages of gold mineralization and the microthermometry of fluid inclusions and the analysis of gas-liquid composition, the properties and evolution process of ore-forming fluids are discussed in this paper. The results show that the homogenization temperature of fluid inclusions in the first stage is 105 ~ 368 鈩，
本文编号：2271490
[Abstract]:The Xaika gold deposit is located in the Dongchuan ore-gathering area of the Paleo-Proterozoic copper polymetallic metallogenic belt in central Yunnan. The orebody is vein-like, net-like, and breccia occurs in the strata of the Kunyang Group of the Middle Proterozoic, which is controlled by the fault structure. On the basis of detailed geological observation and study of ore deposits, the metallogenic process in this area is divided into three stages: the first stage is the quartz-pyrite stage, the second stage is the quartz-polymetallic sulfide stage. The third stage is quartz-carbonate stage. Mineralization is mainly concentrated in the first and second stages. Based on the petrographic observation of fluid inclusions in various stages of gold mineralization and the microthermometry of fluid inclusions and the analysis of gas-liquid composition, the properties and evolution process of ore-forming fluids are discussed in this paper. The results show that the homogenization temperature of fluid inclusions in the first stage is 105 ~ 368 鈩，
本文编号：2271490
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