Abstract
The progressive synmetamorphic deformation path of the Ryoke low P/T type regional metamorphic belt changes from flattening to uniaxial extension. The flattening-type deformation dominates in the northern region of the Ryoke belt, whereas in the southern region the uniaxial extension deformation is predominant. The strain magnitudes of both regions increase with the increasing metamorphic temperature. The axial ratios of a 1 a 2 ( a 1 is the long axis and a 2 is the intermediate axis of strain ellipsoid) reached 3bout 3 and 4. The gradual change in deformation history suggests that the Ryoke low P/T type metamorphic belt underwent a progressive tangential shear with successive change in magnitude of longitudinal shortening during progressive deformation/metamorphism.
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