REVIEW OF THE BASIC CHARACTERISTICS OF THE METAMORPHIC CORE COMPLEXS IN CHINA

Based on the predecessor's studies,a three-layer structure of the metamorphic core complex is established in this paper.The three layers include the cover (upside brittle distorted stratum), surge layer (the middle solid rheologic ductile layer) and the nucleus (metamorphic core and the paratectonic infracrustal rock).All the three-layer structure's major characters are summarized,and the forming time of the metamorphic core complex is marked out.The forming time is mostly Yanshan epoch,the second is Himalayan epoch, then Tsinning epoch,Caledonian epoch,Hercynian and Indosinian epoch.According to the metamorphic corecomplex's geotectonic locations,the author classifies the metamorphic core complex in China into two types.One is the plate edged metamorphic core complex and the other is the inner plate metamorphic core complex.All the metamorphic core complexs in China are related to anomalous thermality and magmatic activity.There are more than one time magmas invading in the nucleus of the metamorphic core complex.So metamorphic core complex is an ideal structure region for prospecting.