Coesite-bearing eclogites from the Dabie Mountains, central China: petrogenesis, P-T paths, and implications for regional tectonics

Coesite- and kyanite-bearing eclogites are abundant in the southern part of the Dabie Mountains (southern Dabie terrane-SDT). Two types of eclogites from the SDT (Types III and IV) were selected for detailed paragenetic study. This study, together with ultrahigh-pressure mineral assemblages identified in the gneiss-marble country rock, suggests that the continental crust of the SDT has been subjected to a regional ultrahigh-pressure metamorphism as part of a north-dipping subduction zone formed between the Sino-Korean and Yangtze cratons in Triassic time. -from Authors