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应用均一法、激光拉曼显微探针法研究彩霞山铅锌矿床的流体包裹体,发现其类型主要有单相盐水溶液包裹体、气液两相盐水溶液包裹体两类,测得均一温度为180℃~310℃,最佳成矿温度为190℃~220℃,属中低温矿床,代表矿区主要的成矿阶段。测得包裹体的冰点温度为-23.2℃~-0.8℃,盐度为1.4%~23.18%。气液两相包裹体中液相成分以水为主,气相成分以二氧化碳为主,单液相包裹体中成分为w(H2O)>w(CO2)。再据分馏方程计算得到热液水δ(18OH2O)为7~8。结果表明,矿床的形成与岩浆活动有关,矿床成因应划归于与中酸性侵入岩浆活动有关的中低温热液脉状矿床。
The homogeneity method and laser Raman microprobe method were used to study the fluid inclusions in Caixia Mountain Pb-Zn deposit. The types of inclusions include single-phase salt solution inclusions and gas-liquid two-phase brine inclusions. The homogenization temperature Is 180 ℃ ~ 310 ℃, the optimal metallogenic temperature is 190 ℃ ~ 220 ℃, belonging to low-temperature deposits, representing the main mineralization stage. The freezing temperature of the inclusions was measured at -23.2 ℃ ~ -0.8 ℃ and salinity of 1.4% ~ 23.18%. The gas-liquid two-phase inclusions are dominated by water in the liquid phase and carbon dioxide in the gas phase. The composition of the single-liquid inclusions is w (H2O)> w (CO2). According to the fractionation equation, hydrothermal water δ (18OH2O) is calculated as 7-8. The results show that the formation of the deposit is related to the magmatic activity, and the genesis of the deposit should be assigned to the mid-low temperature hydrothermal vein-type deposits related to the medium-acid intrusive magmatic activity.