摘要
CuˉMoˉPbˉZnVAgˉAu成矿系统是最常见的热液矿床的成矿元素组合之一,在世界上广泛分布。其成矿作用通常表现为不同矿种和不同类型的矿床在一定的范围内共生组合,构成成矿系列,并具有较好的分带性。成矿系统的形成多与高钾钙碱性岩浆作用有关,是同一成矿流体体系随时间演化或不同成矿流体体系在同一空间叠加的产物。该成矿系统的研究对于深入了解成矿作用的动力学和矿产资源评价都具有重要的意义。
Cu-Mo-Pb-Zn-Ag-Au Metallogenic systems are globally widespread and constitute some important metal provinces. The mineralizations commonly span a broad range in style and position relative to porphyritic intrusive or volcanic-subvolcanic centers. In a lot of instances, deposits exhibit a well-defined vertical and lateral zonal pattern with Cu-Mo-(W-Sn) porphyry, roof-breccias ores at their core. Removed from the core, the types and metal assemblages of the zoned deposits are varied from Pb-Zn-Cu skarns or stockworks ores at the peripheral areas, to Pb-Zn-(Ag) veins, disseminations and hydrothermal breccias at proximal areas, and to epithermal Ag-Au-(Pb-Zn) ores at distal areas. Although many models have been proposed as interpretations of both the genesis and the distinctive habits of zoning, the present understanding on the genetic processes critical to its formation is still limited. It is clear that the metallogenic systems were controlled by many important factors such as geodynamic setting, igneous nature, hydrothermal fluid evolution and structural features. The Cu-Mo-Pb-Zn-Ag-Au Metallogenic System is geologically intriguing, and perhaps more importantly, It offers one of the best examples to study dynamic process that affect availability, transport, and precipitation of metals across a broad spectrum of magmtic-hydrothermal deposit types and conditions, and to reconstruct the geochemical evolution path of the melts and exsolving fluids through time and space. In addition, the geological features of the Cu-Mo-Pb-Zn-Ag-Au Metallogenic System have implications for exploration, particularly in large magmatic hydrothermal districts where various types of base and precious metal deposits may occur. The vectors of alteration and metal assemblages are useful parameters to assist exploration.
出处
《地质调查与研究》
2003年第4期213-220,共8页
Geological Survey and Research
基金
国家土资源部"九五"资源与环境科技攻关项目(95-02-003)
关键词
成矿系统
成矿作用
矿产资源评价
Cu-Mo-Pb-Zn-Ag-Au
metallogenic system
mineralization
assessment on mineral resources
