阿武隈帯,松ヶ平・母体帯,北上帯

概要

論文の詳細を見る
The Abukuma, Matsugadaira-Motai and Kitakami belts form the fundamental structure of the basement complex in Northeastern Japan. The Matsugadaira Motai belt is of glaucophanitic metamorphism. The metamorphic rocks of this belt are covered with unconformity by the Upper Devonian and the Lower Carboniferous rocks belonging to the Kitakami belt. The Kitakami belt consists of the Paleozoic (from Middle Silurian) - Mesozoic sediments and is developed mainly on the eastern side of the Matsugadaira-Motai belt. The glaucophanitic metamorphism of the Matsugadaira-Motai belt occurred in the pre-Middle Silurian before the development of the Kitakami belt. In the Abukuma belt the older metamorphism of kyanite-sillimanite series with granite intrusions seems to have occurred in the pre-Middle Silurian and the younger metamorphism of andalusite-sillimanite series with granite intrusions in the Late Mesozoic. The Late Mesozoic granite intrusions and related metamorphism occurred also in the Matsugadaira-Motai and the Kitakami belts. The geological relationship between the Matsugadaira-Motai and the Abukuma belts during the pre-Middle Silurian is discussed in this paper.
日本地質学会の論文
1974-07-31