Post-collisional ductile extensional tectonic framework in the UHP and HP metamorphic belts in the dabie-sulu region, China

摘要

The present-day observable tectonic framework of the ultrahigh-pressure(UHP)and high- pressure(HP)metamorphic belts in the Dabie-Sulu region was dominantly formed by an extensional process, mostly between 200 and 170 Ma, following the Triassic collision between the Sino-Korean and Yangtze cratons. The framework that controls the present spatial distribution of UHP and HP metamorphic rocks in particular Displays the typical features of a Cordilleran-type metamorphic core complex, in which at least four regional-scale, Shallow-dipping detachment zones are recognized.