ひだ変成岩の構造

概要

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A lot of contraversies have been held from various standpoint of view about the age of the Hida metamorphism. The structure of the metamorphic rocks on the inner side and its relationship to the structure of the Paleozoic formation on the outer side have bearings quite important on this problem. Several years ago, the writers pointed out the parallelism of structure between metamorphic rocks and Paleozoic formation, in the Funatsu district. After the survey covering almost all area within the metamorphic terrain, the writers become to realize that the relationship concluded in the Funatsu district is passable through all the area. The main skelton of structure common to metamorphic and Paleozoic formation near-by is "stepwise" combination of two trends, tangential and normal to the arc of distribution of metamorphic rock. This step-wise structure is often found even in the Paleozoic formations far from the Hida metamorphic rock. The writers, therefore, believe that, from the structural standpoint of view, Hida metamorphism belongs probably to the orogenic movement which gave rise to folding of Paleozoic sediments.
地学団体研究会の論文
1960-05-03