Multi-Layered Low-Angle Ductile Detachment System in Dabie-Sulu UHPM and HPM belts, China

摘要

The present-day observed crustal-scale tectonic style of ultrahigh-pressure metamorphic (UH- PM) and high-pressure metamorphic (HPM) belts in the Dabie-Sulu region was dominantly formed By extensional processes, postdating the Triassic collision between the Sino-Korean and Yangtze Cratons. The extensional structures overprinting the previous structures related to contraction that Produced the thickened continental crust of the UHPM and HPM belts, in particular display the Typical features of a Cordilleran-type metamorphic core complex, in which at least four regional- Scale, low-angle ductile shear zones that constitute a detachment system, are recognized in the Dabie region.