【摘要】：播卡金礦位于滇中元古宇銅多金屬成礦帶之東川礦集區(qū),礦體呈脈狀、網(wǎng)脈狀、角礫狀產(chǎn)于中元古界昆陽(yáng)群地層中,受斷裂構(gòu)造控制。本文在詳細(xì)的礦床地質(zhì)觀察和研究基礎(chǔ)上,將本區(qū)成礦作用分為3個(gè)階段:第1階段為石英-黃鐵礦階段,第2階段為石英-多金屬硫化物階段,第3階段為石英-碳酸鹽階段。成礦主要集中在第1和第2階段。本文通過(guò)金礦成礦各階段的流體包裹體的巖相學(xué)觀察,結(jié)合流體包裹體的顯微測(cè)溫、氣液相成分分析,討論了成礦流體的性質(zhì)、演化過(guò)程。研究表明:第1階段的流體包裹體均一溫度在105~368℃,鹽度為7.59%~44.32%(NaCleq);第2階段的流體包裹體均一溫度范圍在119~294℃,鹽度為5.26%~17.87%(NaCleq);第3階段的流體包裹體均一溫度在115~195℃,鹽度為4.18%~14.57%(NaCleq)。流體包裹體氣相成分以H_2O為主,其次為少量CO_2;液相成分以Na+、Cl-為主,其次為Ca~(2+)、SO_4~(2-),成礦流體主要屬于NaCl-H_2O體系。綜合礦床地質(zhì)特征和成礦流體研究,本文認(rèn)為播卡金礦屬于巖漿熱液礦床。
[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，

本文編號(hào)：2271490