摘要
在对矿床地质地球化学详细研究的基础上，讨论了银山多金属矿床成矿作用的时空特征和矿床成因。研究表明，银山矿床的形成与燕山期第二阶段侵位的次火山岩具有密切的时空和物质组分的联系，然而，矿床与次火山岩都是深部隐伏岩体之岩浆分异的流体和熔体的产物，二者是同源但侵位有早晚的亲缘关系。矿床的成矿演化具有多期多阶段性。矿床分带具有多中心性、不对称性、叠加性和定向性。引起成矿物质沉淀的主要机制是流体的混合作用而不是沸腾作用。将银山矿床与国外类似矿床对比，可以称为“过渡型矿床”。其深部是否隐伏有斑岩铜矿床，仍是一个尚未解决但很有意义的研究课题。
Based on detailed geological and geochemical researches,this paper has dealt with metallogenic temporal spatial characteristics and genesis of the Yinshan polymetallic deposit.Studies show that the formation of the Yinshan deposit is closely related to subvolcanic rock emplaced at the second stage of Yanshanian period in time,space and material components.The ore deposit and the subvolcanic rock are both products of fluids and melts formed by magmatic differentiation of a concealed intrusive body at depth,exhibiting kindred relationship but not emplaced simultaneously.The ore forming evolution of the ore deposit shows multi phase and polystage features,and the metallogenic zoning is characterized by multicenters,asymmetry,superimposition and directing property.The main mechanism responsible for the deposition of ore forming materials is the mixing of fluids rather than the boiling.In comparison with similar deposits abroad,the Yinshan deposit might be classified as a transitional deposit.Nevertheless,whether there exists a porphyry copper deposit at depth remains an interesting problem to be solved in future.
出处
《矿床地质》
CAS
CSCD
北大核心
1997年第4期298-308,共11页
Mineral Deposits
基金
国家自然科学基金
地矿部"八五"基础地质研究项目
中国博士后科学基金A类
中国科学院矿床地球化学开放研究实验室基金
关键词
成矿作用
成矿分带
矿床成因
多金属矿床
银矿床
temporal spatial characteristics of the ore forming process,metallogenic zoning,genesis of the ore deposit,Yinshan polymetallic deposit
