SPATIOTEMPORAL DISTRIBUTION AND DYNAMIC CHARACTERISTICS OF THE EARLY CRETACEOUS METAMORPHIC CORE COMPLEXES IN SOUTHERN LIAODONG PENINSULA

Through detailed geological structure survey and comprehensive study on large amounts of previous data, 4 metamorphic core complexes(MCC) are identified in the southern Liaodong Peninsula, namely Jinzhou MCC, Wanfu MCC, Xinfang MCC and Lizifang MCC, among which the latter two are newly discovered. They have both similarities and differences in formation time and kinematic characteristics. The macro and micro kinematic characteristics show that the relative movement of hanging wall to footwall of Jinzhou MCC and Xinxin MCC is generally shearing slide from east to west, while that of Wanfu MCC and Lizifang MCC is shearing slide from west to east. By comprehensively analyzing the evolution process, formation model and formation mechanism of the MCCs in southern Liaodong Peninsula, it is concluded that they were all formed in the Early Cretaceous destructive peak of North China Craton, with the interaction between Izanagi Plate and Eurasian Plate as one of the important factors for their formation.