裂谷演化对铅锌矿成矿作用的影响——以辽吉裂谷为例

辽吉裂谷在拱张、裂陷、下沉、上升和挤压消亡过程中,沉积了巨厚的碎屑沉积物,并发生多次强烈的构造活动、岩浆活动、变质变形作用及深部的壳幔作用.通过对辽吉裂谷的演化和成矿模式、裂谷内铅锌矿床的成因类型和其地球化学行为的分析,认为裂谷作用为铅锌矿形成提供了丰富的矿源、富集成矿的场所和有效的热能、裂谷演化中物理化学条件的改变和岩浆活动也使得成矿物质进一步富集成矿.

EFFECT OF THE RIFT EVOLUTION ON Pb-Zn MINERALIZATON:A CASE STUDY OF LIAOJI RIFT

Globally,many Pb-Zn ore are hosted in rifts.Especially the mega Pb-Zn ore deposit-Jiande Pb-Zn ore deposit of Korea is occurred in Liaoji rift.It is obvious that the relation of rift and mineral resources is intimate.In the pocess of arch-stretching,rifting,sinking,uplifting and compression,disappearance of the rift,mega-thick clastic sediments and many violent tectonic,magmatism,metamorphism and deformation,the deep crust-mantle interaction took place.The evolution of Liaoji rift,the metallogenic model,the genetic types of Pb-Zn ore deposits in the rift and its geochemical behavior is analyzed.The authors think: that the rift provide the abundant ore source,the location of enrichment and mineralization and the effectual thermal energy for ore formation,the change of physical-chemical condition of the rift evolution and magmatism,make the minerogenic matter more enrichment and mineralization.