抄録
The Tonaru metagabbro mass which is considered to have been derived from a layered gabbro is one of the eclogite-bearing bodies located in the central part of the Besshi district, and it lies within the highest grade oligoclase-biotite zone of the Sambagawa sequence. Kyanite-garnet amphibolites from the western parts of the Tonaru metagabbro mass represented three metamorphic events.