A NEW VIEWPOINT ON THE EVOLUTION STAGES OF QINLING OROGENIC BELT

The development and evolution of Qinling-Dabie orogenic belt is quite similar to the formation and splitting of the Pangea since Phanerozoic eon.The China paleo-plates splitted into North China and Yangtze paleo-plates and Qinling limited ocean basin in middleOrdovician Epoch.The North China and Yangtze paleo-plates coalesced to form China plate and middle Qinling orogenic belt in Carboniferous-Permian times. Since the Mosozoic the newly-formed China plate has once more become splitted.The granites in Qinling-Dabie orogenic belt formed since Mesozoic are the result of splitting rather than the sysmbol of plate convergence and collision.The eclogites containing coesite and diamond and the ultrabasic rocks were brought to eatrh's surface by deep sheets moving upward along the strike of the orogenic belt.