胶东地区岩浆热液型金矿成矿流体演化与成矿预测  

ORE FIUID EVOLUTION AND ORE PREDICTION OF MAGMATIC HYDROTHERMAL GOLD DEPOSITS IN JIAODONG AREA

作　　者：王铁军[1] 阎方 

机构地区：[1]天津地质研究院,天津300061 [2]山东栖霞金斜黄金矿业有限公司,山东栖霞365002

出　　处：《地质找矿论丛》2002年第3期169-174,共6页Contributions to Geology and Mineral Resources Research

摘　　要：胶东地区岩浆热液型金矿的成矿作用不是一次完成的 ,成矿作用的多阶段活动不仅表现在矿石结构构造上 ,包裹体观测表明 ,在同一包体片中 ,甚至在同一石英颗粒上经常见有不同类型的原生包裹体。这表明成矿作用过程中深部上升的富含 CO2 热液与断裂内原地水频繁发生混合作用 ,即成矿流体是多次脉动式注入的。脉动式叠加矿化的找矿意义是成矿场的垂向迁移。即早期金矿化倾向于分布在浅部 ,随着时间的推移 ,成矿温度下降 ,在矿场向深部迁移 ,矿化深度增加。因此剖面上存在多个矿化富集段 ,富集段与贫化段相间分布。Ore formation of magmatic hydrothermal gold deposit was not once complted. It was formed in multiple stages which are not only manifested by ore structures and textures but also by fluid inclusion observations. On the same section or even in the same quartz grain occur different primary fluid inclusions. This indicates that the ascending CO 2 bearing hydrothermal fluid was frequently mixed with the water trapped in fractural zones, i.e. ore fluid was multiply pulsed into the ore forming system and mineralization is overprinted in the vertical direction. The early mineralization took place in shallow part then as the time passed temperature dropped and ore forming field shifted to depth i.e. mineralization took place to more depth. Thorefore, multiple ore concentrations occur in profile interpaced with barren or poor parts.

关 键 词：成矿预测 金矿床 岩浆热液 成矿场 流体包裹体 胶东地区 应力场 

分 类 号：P618.51[天文地球—矿床学]