华北前寒武纪成矿系统与重大地质事件的联系

Secular changes of metallogenic systems link with continental evolving of the North China Craton

前寒武纪是指显生宙最古老的地质时代——寒武纪之前的地质时代,它占了地球演化历史的近90%。地球陆壳的80%～90%以上是在前寒武纪形成的,记录了复杂和惊心动魄的地质构造过程,还赋存着丰富的矿产资源。前寒武纪最重要的地质事件有陆壳的巨量增生、前板块机制/板块机制的构造转折、由缺氧到富氧的地球环境的剧变。华北克拉通是全球最古老陆块之一,前寒武纪各阶段全球性重大地质事件几乎都被记录下来,并表现出一些特殊性。与全球其它克拉通相比,华北陆壳生长-稳定化过程具有多阶段特征,太古宙末-古元古代环境剧变记录复杂多样,古元古代与板块体制建立和超大陆演化相关的俯冲碰撞和伸展裂解等地质记录丰富,中-新元古代经历持续伸展并接受巨量裂谷沉积。这些重大地质事件都伴随大规模成矿作用,形成了华北克拉通丰富的矿产资源和独特的优势矿种。

Precambrian period is an oldest and longest eon from 5420Ma to about 4500Ma, taking over - 90% of the Earth＇ s history. The 80% ~90% continental crust in the Earth generated in Precambrian, which records complicated geoteetonic processes. The most important geological events in Precambrian tectonic evolution include Neoarchean enormous crustal growth, tectonic regime inversion from pre-plate tectonics to plate tectonics, and great oxygen event （GOE） in Paleoproterozoic. The North China Craton （NCC） is one of oldest eratons in the world and records almost all the important geological events of the Earth. The NCC also demonstrates some special characteristics, such as multi-stage cratonization, Paleoproterozoic rifl-subduction-collisional event, Earth＇ s paleo-elimate and paleo-environment change, and Late-Paleoproterozoic-Neoproterozoic multi-stage rifting event. These important geological events controlled mineralization with tectonic evolution and formed various and abundant ore-deposits in the NCC.