Abstract:

Rheology of rocks is an essential characteristics for continental orogenesis. The formation and exhumation of the UHP metamorphic rocks is a complex rheological process for the material in deep subduction zone. A profound study on the rock rheology of continental crust and mantle is a key to comprehensively understand of the continental orogenesis and dynamic process of deep subduction and exhumation of the continental crustal rocks. Lithosphere rheology mainly concerns about the rheological stratification, deformation partitioning and strain localization, and the effect of partial melting on the rheology of the continental crustal rocks. Based on the essential principle and method of the lithosphere rheology, the rheological properties of the UHP metamorphic rocks in the DabieSulu UHP metamorphic belt are described and the plastic rheology of the formation and exhumation process of the UHP metamorphic rocks are discussed.

Key words: ultrahigh-pressure metamorphic rock, plastic rheology, Dabie-Sulu UHP metamorphic belt