摘要
得尔布干成矿带热液型铅锌银矿床具有分布密集、成矿时代集中以及成矿条件相似的特征,它们有着内在的成因联系.铅锌银矿体主要赋存于中、晚侏罗世火山岩中,早白垩世次火山岩或侵入岩可能为成矿提供了重要的物源和动力源;区域性的隆-拗交接构造、火山机构以及火山-次火山岩浆作用是最重要的控制因素,北西向张-剪性断裂系统为成矿提供了控矿、导矿和容矿空间,成矿物质主要源于地幔,含矿气液沿火山岩断裂系统运移并与围岩发生充填和交代使成矿元素析出沉淀而成矿.
The hydrothermal vein-type Pb-Zn-Ag deposits in the Derbugan metallogenic belt are characterized by intensive distribution, concentrated times of mineralization and similar metallogenie conditions. They have inherent relations in genesis. The Pb-Zn-Ag ore bodies occur mainly in the Middle-Late Jurassic volcanic rocks. The Early Cretaceous subvolcanic or intrusive rocks may be the essential sources of substance and power. The regional uplift-depression structures, volcanic edifices and volcanic-subvolcanic magmatism are the significant controlling factors. The NW-trending tensional-shearing fault system provides guide and host for ore-forming materials. The ore materials are mainly derived from the mantle. The ore-bearing hydrothermal fluid transmitted within the fracture system in the volcanic rocks, filled and replaced the surrounding rock metasomatism, making the precipitation and mineralization of ore-forming elements.
出处
《地质与资源》
CAS
2014年第6期525-530,共6页
Geology and Resources
关键词
铅锌银矿
成矿特征
控矿因素
成矿模式
得尔布干成矿带
Pb-Zn-Ag deposit
metallogenic characteristics
ore-controlling factor
metallogenic model
Derbuganmetallogenic belt
