A RESEARCH ON METAMORPHIC CORE COMPLEX OF CHISHISHAN IN RUOQIANG COUNTY,XINJIANG

A large scale metamorphic core complex is found in the western Beishan rift valley, Xinjiang. Its lower plate is the Paleoproterozoic crystalline basement, its hanging wall is a Middle Proterozoic metamorphic rock series and the master detachment fault is a large scale deformed low angle ductile normal fault. The south and north sides of the metamorphic core complex are all grown in the large scale superposed basin, and north side forms a young straight fault and syntectonic magmatic rock. The formation of metamorphic core complex is related to the extension of the Beishan rift valley. The first discovery of the metamorphic core complex possesses important significance to the research of the Beishan rift valley.