Pre-Yanshanian geological events in the northern margin of the North China Craton and its adjacent areas

摘要: Recent researches on the northern margin of North China Craton(NCC) and its adjacent areas have been mainly focused main pre-Yanshanian tectonic framework late Mesozoic tectonomagmatic evolution lithosphere destruction.This paper gives a brief review previous research progress future prospect in this aspect.The NCC has undergone multiple magmatic processes after cratonization during ～1.8 Ga.Large volumes 1.35-1.30 Ga mafic sill(dyke) swarms are related to breakup from Columbia supercontinent might indicate that was probably member Nena including Laurentia(North America Greenland),Siberia Baltica cratons supercontinent.The continental initiated at 1.35 Ga.During Early Paleozoic,the Bainaimiao island arc belt located south NCC.At end accreted by arc-continental collision.EarlyMiddle alkaline complexes with emplacement ages ranging 410-380 Ma extension collision between terrane.From Late Carboniferous(～320 Ma),the became an Andean-style due southward subduction Paleo-Asian oceanic plate beneath NCC.The also occurred Xing-Meng orogenic period,which resulted formation Baolidao arc.Final closure Ocean Mongolian terrane latest Permian ～earliest Triassic period post collison magmatism ～250 Ma.During ～Early Jurassic period,the is characterized strong thrusting.In early Jurassic,the Archean-Paleoproterozoic basement metamorphic rocks were widely exposed.The preliminarily established prior Yanshanian tectonism magmatism.