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小塔子沟金矿床属于典型的含金石英脉型矿床,其中1号脉是该矿区具代表性的矿脉之一。对小塔子沟金矿床1号脉矿石中的流体包裹体进行了岩相学、显微测温及单个包裹体成分激光拉曼光谱研究。结果表明:矿石中发育CO2包裹体、含CO2三相包裹体和水溶液包裹体等3种类型;成矿过程中,流体经历了NaCl-H2O-CO2体系的不混溶作用;各类包裹体均一温度260~400℃,含CO2包裹体盐度为0.21%~2.42%(NaCl),气液二相包裹体盐度为5.26%~8.14%(NaCl),成矿压力68~108 MPa,成矿深度6.67~8.61 km。综合分析认为小塔子沟金矿床为中温深成热液金矿床。
The small Tazigou gold deposit belongs to the typical gold-bearing quartz vein type deposit, in which the No.1 vein is one of the representative veins of this mining area. The petrographic inclusions, microscopic temperature measurement and laser Raman spectroscopy of individual inclusions were carried out on the fluid inclusions of vein No. 1 in the Little Taziagou gold deposit. The results show that there are three types of inclusions: CO2 inclusions, CO2 three-phase inclusions and water inclusions in the ore. During mineralization, the fluids undergo immiscibility of NaCl-H2O-CO2 system. The salinity of CO2 inclusions ranges from 0.21% to 2.42% (NaCl) at 260-400 ℃. The salinity of gas-liquid two-phase inclusions ranges from 5.26% to 8.14% (NaCl) and the metallogenetic pressure is 68-108 MPa. Depth of 6.67 ~ 8.61 km. The comprehensive analysis shows that the small Taziagou gold deposit is a mid-temperature deep-hydrothermal gold deposit.