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CRUSTAL TECTONIC FRAMEWORK OF CHINA AND ITS FORMATION PROCESSES: CONSTRAINTS FROM STUCTURAL DEFORMATION

LI Jinyi;ZHANG Jin;LIU Jianfeng;QU Junfeng;ZHENG Rongguo;ZHAO Shuo;WANG Lijia;ZHANG Xiaowei;Institute of Geology,Chinese Academy of Geological Sciences;  
The crustal tectonic framework of China with its formation and evolution has been a major issue for geological field. However,almost all the available studies on this issue focus on tectonic division and evolution,but very few attentions are given to the deformation features and structural relation of various tectonic units in China. On the basis of comprehensive study of the existing data and the authors' research,this paper analyzes and summarizes the structural deformation and crustal tectonic framework of various regions such as South China,North China,Northeast China,Northwest China,Qinghai-Tibet plateau and Sulu-Dabie-Qinling,discusses tectonic division of some regions and put forward some new ideas which includes that there are same tectonic units on the two sides of the Songliao basin could be divided and correlated; that tectonic units in the West Junggar region were parts of the Kazakhstan paleoplate,and the ones in the East Junggar and northern East Tianshan belonged to the accretionary margins of Siberian Paleoplate; that the so-called Mudanjiang suture is not proved by available geological data; and that there are nearly EW-and NW-extended uplifts and depressions besides previous NNEextensional ones in East China. And then,based on structural data,it briefly probes into the basement framework and formation age of North China craton,the formational age of the Yangtze and Tarim basements,amalgamation of North China,Yangtze and Tarim cratons and some other smaller blocks from Early Paleozoic through Triassic, Jurassic to Cenozoic, superposition and reworking of tectonic deformation in eastern China since Jurassic on the existing structures,and the formation of the current crustal tectonic framework of China
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