小秦岭大湖金钼矿流体包裹体研究及矿床成因

发布时间：2018-10-18 10:24

【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CO_2-H_2O型包裹体及少量的纯CO_2包裹体;中阶段主要发育CO_2-H_2O、水溶液和含子晶包裹体,纯CO_2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CO_2-H_2O型包裹体的均一温度为209~414℃,盐度为1.4%~12.8%;中阶段原生CO_2-H_2O型、水溶液包裹体的均一温度分别为201~380℃和202~333℃,盐度分别为0.6%~12.5%NaCleqv和4.4%~12.2%NaCleqv。估算的早、中阶段CO_2-H_2O型包裹体捕获压力分别为106~217.2 MPa和90.3~128.7 MPa。成矿流体具中高温、中深成、低盐度、富CO_2的特征,表明其为造山型矿床。
[Abstract]:The gold-molybdenum deposit of Lingbao Lake in Henan Province is located in the Xiaoqinling gold ore field and belongs to the quartz vein deposit controlled by fault. In order to understand the genesis of the gold and molybdenum deposit in the Great Lake, the fluid inclusions in quartz in the early, middle and late stages of the Great Lakes were analyzed by microlithology, microthermometry and Raman spectroscopy. The results show that aqueous solution and CO_2-H_2O inclusions and a small amount of pure CO_2 inclusions are mainly developed in the early stage of metallogeny, while CO_2-H_2O, aqueous solution and sub-crystalline inclusions are mainly developed in the middle stage, but the pure CO_2 inclusions are rarely developed. Water inclusions are mainly developed in the late stage. The homogenization temperature of the primary CO_2-H_2O inclusions in the early stage is 209 ~ 414 鈩，

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