蚀变岩Au-Ag相关性及其在资源评价中的应用  

Au-Ag Relativity of Altered Rocks and Its Application in Resource Evaluation

作　　者：高帮飞[1] 周迎春[2] 郭春影[1] 

机构地区：[1]中国地质大学(北京)地质过程与矿产资源国家重点实验室 [2]海南省地质调查院

出　　处：《金属矿山》2008年第7期80-83,共4页Metal Mine

基　　金：国家自然科学基金项目(编号:40572063);教育部跨世纪人才基金项目;教育部科学技术研究重点项目(编号:03178)

摘　　要：典型Au,Ag矿床的统计研究发现,蚀变岩Au-Ag相关性对矿床的矿化类型有指示作用,即Au-Ag相关系数高,Au和Ag可以同时成矿;Au-Ag相关系数低,Au或Ag独立成矿。理论和实例分析表明,热液蚀变过程中Au,Ag的分异,主要与Au、Ag元素地球化学性质、初始岩石建造特征以及热液来源和演化等有关。Au-Ag相关性较蚀变岩石Au/Ag比值更能反映热液流体的叠加作用。运用该方法可以推断矿床潜在矿化类型,对已有矿山的探矿增储及资源综合利用有一定的指导意义。The statistical results of typical Au, Ag deposits reveal that the relativity between gold and silver elements （RGSE） of altered rocks plays a role of indicating the mineralization type of deposit. When RGSE is high, both Au and Ag can have a content required for economic ore bodies while RGSE is low, only Au or Ag can be of economic significance. The theoretical and practical analysis indicates that the differentiation of Au from Ag may result from their difference in geo- chemical properties, primary rock formation characteristics and the origin and evolution of the hydrothermal fluids. RGSE can better reveal the superposition of multi-phases of mineralized fluids than Au/Ag ratio. It is of guidance significance to the application of RGSE to infer the potential mineralization type of deposits, to the exploration for reserve expansion of the existing mines and to the resource comprehensive utilization.

关 键 词：Au—Ag相关性 分异 矿化类型 资源预测 

分 类 号：P618.510.4[天文地球—矿床学] TB383[天文地球—地质学]