华北板块北缘中元古代造山带的确立及其构造演化

THE ESTABLISHMENT AND TECTONIC EVOLUTION OF PROTEROZOIC OROGENIC BELT IN THE NORTH MARGIN OF NORTH CHINA PLATE

华北板块北缘发育一条中元古代晚期大陆边缘碰撞造山带 ,它由内蒙西部狼山起向东延伸到辽西和吉林东部一带 ,全长 2 0 0 0余km。造山带内部发育了不同类型变质的沉积岩、火山沉积岩 ,以及各种类型深成侵入岩。在 1.0Ga左右 ,由西伯利亚板块和华北板块对接碰撞 ,形成了巨大陆缘碰撞造山带。这次构造事件是Rodinia超大陆拼合事件的一部分 ,表明了在Rodinia超大陆时期华北板块和西伯利亚板块是连在一起的。

There is the collision orogenic belt which was developed in late middle Proterozoic era, in north margin of North China plate. The belt extends from Langshan in Inner Mongolia to Western Liaoning province and Eastern Jilin province. Its length is over 2 000 km. A variety of metamorphic sedimentary rocks, volcanic rocks and plutonic rocks were developed in this tectonic belt. This significant tectonic belt was formed by the collision between Siberia plate and North China plate in about 1.0 Ga. This tectonic event was a part of Rodinia super continent convergence event.It is clear that Siberia platform connected with North China platform during period of Rodinia supercontinent.