Glaucophane-bearing mafic schist discovered from the Nedamo Terrane (ex- “Hayachine Terrane”), Northeast Japan, and its geologic implications

Abstract

Glaucophane-bearing mafic schist was discovered from the Nedamo Complex of the Nedamo Terrane for the first time. The Nedamo Terrane is an Early Carboniferous accretionary belt and is situated between the North Kitakami Terrane (Jurassic accretionary complex) and the South Kitakami Terrane (Paleozoic island-arc). The mafic schist indicates that a part of the Nedamo Complex has suffered high-P/T metamorphism of blueschist facies, probably epidote-blueschist subfacies. The present discovery gives a clue for the geotectonic comparison between the Southwest and Northeast Japan, and accordingly the Paleozoic tectonics of eastern Asian margin.