中文摘要：

河南灵宝大湖金钼矿床位于小秦岭金矿田,属断裂控制的石英脉矿床。为了解大湖金钼矿矿床成因,对大湖早、中和晚阶段石英中的流体包裹体进行了显微岩相学、显微测温及拉曼光谱分析。分析结果表明：成矿早阶段主要发育水溶液和CO2-H2O型包裹体及少量的纯CO2包裹体;中阶段主要发育CO2-H2O、水溶液和含子晶包裹体,纯CO2包裹体发育很少;晚阶段主要发育水溶液包裹体。早阶段原生CO2-H2O型包裹体的均一温度为209414℃,盐度为1.4%12.8%;中阶段原生CO2-H2O型、水溶液包裹体的均一温度分别为201380℃和202333℃,盐度分别为0.6%12.5%NaCleqv和4.4%12.2%NaCleqv。估算的早、中阶段CO2-H2O型包裹体捕获压力分别为106217.2 MPa和90.3128.7 MPa。成矿流体具中高温、中深成、低盐度、富CO2的特征,表明其为造山型矿床。

英文摘要：

The Dahu gold deposit in the northern part of the Xiaoqinling gold belt is located in Henan Province.It’s a typical vein deposit controlled by brittle-ductile shear zones.The ore forming process can be divided into the early,middle and late stages based on the cross-cutting relationships and mineral assemblages.Petrographic,fluid inclusion micro-thermometric,and micro Raman spectroscopic analyses reveal four types of fluid inclusions（FIs） in quartz of the Dahu gold and molybdenum deposit,i.e.,CO2-H2O,pure CO2,H2O-solution and daughter mineral-bearing（S type） fluid inclusions.The homogenization temperatures of CO2-H2O inclusions in the early-stage quartz range from 209 ℃ to 414℃ and the salinity ranges from 1.4% to 12.8% NaCleqv.The middlestage quartz contains primary CO2-H2O and H2O-solution,and their homogenization temperatures range from 201380℃ and 202333℃,with the salinity of 0.6%12.5% and 4.4%12.2% NaCleqv respectively.Trapping pressures estimated from the CO2-H2O inclusions are 106217.2 and 90.3128.7 MPa for the early and middle stage,respectively.In short,the characteristics of ore fluids in the early and middle stages are meso-to hypothermal,CO2-rich and low salinity,which are consistent with the properties of metamorphic fluids,whereas the late stage fluids show low salinity,CO2-poor and low temperature.The ore-forming fluid system of the Dahu gold deposit is identical to that of an orogenic-type.