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本文通过对广西栗木矿区金竹源矿床和水溪庙矿床的流体包裹体研究,得出该矿区流体包裹体主要有两相H_2O-NaCl和H_2O-NaCl-CO_2两种类型。显微测温结果表明:两相H_2O-NaCl型流体包裹体均一温度主要集中于181.9~258.8℃,盐度w(Na Cleq)主要集中于4.01%~6.87%,密度0.690~0.988 g/cm3;H_2O-NaCl-CO_2型流体包裹体均一温度为178.5~331.1℃,主要集中在两个温度段,分别为高-中温段(265.3~315.5℃)和中-低温段(202.3~264.1℃),盐度w(NaCleq)主要集中在0.21%~5.05%,密度为0.678~0.886 g/cm3。栗木矿区成矿流体有两个温度集中段,且具有低盐度、低密度的特征。氢氧同位素研究结果表明:金竹源矿床钨锡铌钽矿化花岗岩石英δD值为-73.6‰~-62.8‰,δ~(18)OV-SMOW值为7.5‰~8.9‰,计算得δ~(18)OH2O值为6.00‰~7.40‰;水溪庙矿床钨锡铌钽矿化花岗岩石英δD值为-73.8‰~-58.3‰,δ~(18)OV-SMOW值为11.0‰~13.2‰,计算得δ~(18)OH2O值为9.50‰~11.70‰,水溪庙矿床含钨锡石英脉石英δD值为-75.3‰~-56.6‰,δ~(18)OV-SMOW值为11.8‰~14.1‰,计算得δ~(18)OH2O值为2.20‰~4.50‰。栗木矿区钨锡铌钽矿化花岗岩成矿流体来源于岩浆水,含钨锡石英脉成矿流体来源于岩浆水和大气降水的混合流体。
Based on the study of fluid inclusions in Jinzhuyuan deposit and Shuixiamu deposit in Liam mining area in Guangxi Province, it is concluded that there are two types of fluid inclusions: H_2O-NaCl and H_2O-NaCl-CO_2. The microscopic temperature measurement results show that the homogenization temperatures of two-phase H_2O-NaCl fluid inclusions are mainly from 181.9 to 258.8 ℃, and the Na cleq concentrations are from 4.01% to 6.87% and from 0.690 to 0.988 g / cm3. The homogenization temperatures of H_2O-NaCl-CO_2 fluid inclusions are 178.5 ~ 331.1 ℃, which are mainly concentrated in two high temperature sections (265.3 ~ 315.5 ℃) and medium-low temperature sections (202.3 ~ 264.1 ℃) Degree w (NaCleq) mainly concentrated in 0.21% ~ 5.05%, density 0.678 ~ 0.886 g / cm3. The ore-forming fluid in Liugu mining area has two temperature concentration sections, and has the characteristics of low salinity and low density. The results of hydrogen and oxygen isotope studies show that the δD values of quartz, tungsten, tin, niobium and tantalum mineralized granitoids in the Jinzhu source deposit range from -73.6 ‰ to -62.8 ‰ and the δ ~ (18) OV-SMOW values range from 7.5 ‰ to 8.9 ‰, 18), the O2O values ranged from 6.00 ‰ to 7.40 ‰. The δD values of quartz, tungsten, niobium and tantalum mineralized granitoids in the Shuiuximiao deposit ranged from -73.8 ‰ to -58.3 ‰ and the δ ~ (18) OV-SMOW values ranged from 11.0 ‰ to 13.2 ‰. The calculated δ18OH2O values ranged from 9.50 ‰ to 11.70 ‰. The δD value of the wolframite-quartz quartz vein in the Shuiuximiao deposit is -75.3 ‰ ~ -56.6 ‰ and the δ ~ (18) OV-SMOW is 11.8 ‰ ~ 14.1 ‰, the calculated δ ~ (18) OH2O values ranged from 2.20 ‰ to 4.50 ‰. The ore-forming fluid of the tungsten, tin, niobium and tantalum mineralized granite in Liulin mining area is derived from magmatic water. The ore-forming fluid containing tungsten-tin-quartz quartz vein is derived from the mixed fluid of magmatic water and atmospheric precipitation.