摘要
The Greater Himalayan Complex(GHC),as the metamorphic core of the Himalayan orogen,shows a “hot” collisional orogen characterized by high-grade (up to granulite facies) metamorphic rocks exhumed from the middle-lower crust,widespread migmatites from extensive anatectic processes and high-temperature ductile deformation. It is suggested that extrusion dynamic processes of the GHC are as follows: 1) partial melting in 45~36 Ma resulting in the weak and hot middle crust; 2) orogenparallel gravitational collapse in 28~26 Ma; 3) ductile thrusting since > 26 Ma; and 4) ductile extrusion resulting from the formation of MCT and STD during 23~17 Ma.