A PRELIMINARY NOTE ON DYNAMOMETAMORPHISM DUE TO TECTONIC FORCES

In this article a basic concept on dynamometamorphism as a result of the action of tectonic forces is presented. This means the metamorphism caused by the deformation and factes transformations of rocks and minerals during the tectonic movement in response to the tectonic forces and the resulting rise of temperature. In terms of the texture and structure of the metamorphic rocks,the dynamic recrystallization and the migmatization,as well as the association of stress minerals and their spatial distribution etc.,there can be divided four stages in increasing grade of metamorphism and four corresponding metamorphic rock types as follows:(a)brittle deformation/metamorphism stage; (b)brittle-ductile transition deformation/metamorphic stage; (c)ductile deformation stage and (d) a fourth stage in which significant flow occurs due to local high heat flow stage. A brief description of the main features is here given.