Structural Analysis of the Sambagawa Crystalline Schists of the Sazare Mining District, Central Shikoku

Rock structures of crystalline schists in the Sambagawa metamorphic zone have been analysed and described in three scales, macroscopic, mesoscopic, and microscopic scales. Relation between these structures and metamorphism has been briefly considered. Gradual change in styles of folds and S-surfaces during metamorphism can be recognized. Orientation of fold axes and lineations is variable in the early stages but is constant in the later stages of the Sambagawa metamorphism. Change in movement plan which is suggested from orientation of rock structures during metamorphism has been recognized.