中国北方陆相火山-次火山热液型银、铅锌矿床研究现状

摘要

陆相火山-次火山热液型银、铅锌矿床是全球银、铅锌矿产资源的重要来源.通过对中国北方陆相火山-次火山热液型银、铅锌矿床时空分布、矿体特征、赋矿围岩、成矿地质体等方面的总结,分析了该类矿床的构造背景,提出次火山岩或超浅成斑岩是此类矿床的成矿地质体.该类型矿床矿体类型主要是石英脉型、细脉浸染型和隐爆角砾岩型等,并指出隐爆角砾岩内部角砾之间的接触带、环状与放射状断裂及其断裂交汇处等部位为矿体提供了赋存空间.%The continental volcanic-subvolcanic hydrothermal Ag-Pb-Zn deposit is an important source of sil-ver,lead and zinc in the world. Based on the summary of temporal and spatial distribution,ore body characteristics, ore-hosting wall rocks and ore-forming geologic body of continental volcanic-subvolcanic hydrothermal Ag-Pb-Zn deposits in Northern China,the paper analyzed the tectonic settings of the deposit of this type and proposed that the subvolcanic rock or super hypabyssal porphyry was the ore-forming geologic body. The orebody in the deposit is mainly quartz-vein,fine-vein disseminated and cryptoexplosive breccia type. It was pointed out that the contact zone of the gravels inside cryptoexplosive breccia,the ring and radiant fracture and their intersections provided hosting space for the orebody.