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1地质背景云南东川博卡地区位于川-滇-黔多金属成矿域中南部,该地区分布着中元古界昆阳群巨厚浅变质岩系。吴富强等(2011)从矿区地层、岩浆岩、矿石的微量元素地球化学特征的角度探讨了博卡金矿床的成因,依据稀土元素的分析研究了博卡金矿床成矿物质来源,进而分析了其成矿过程及机制。据郝珺(2009),博卡金矿中的流体包裹体以液相为主,成分有富钾富钠两种,说明成矿流体是深部热水
1 Geological Background The Bochum area in Dongchuan, Yunnan Province is located in the central-southern part of the Sichuan-Yunnan-Guizhou polymetallic metallogenic area, where the Meso-Proterozoic Kunyang Group gneiss and metamorphic rocks are distributed. Wu et al. (2011) discussed the genesis of the Boca gold deposit from the perspective of trace element geochemical characteristics of strata, magmatic rocks and ores in the mining area. Based on the analysis of rare earth elements, the source of ore-forming material of the Boca Gold Deposit was studied, Its mineralization process and mechanism. According to Hao Jun (2009), the fluid inclusions in the Boca Gold Mine are dominated by the liquid phase, and the compositions are both potassium-rich and sodium-rich, indicating that the ore-forming fluids are deep hot water