White mica K–Ar ages from lawsonite–blueschist facies Hakoishi sub–unit and from prehnite–pumpellyite facies Tobiishi sub–unit of the Kurosegawa belt, Kyushu, Japan

White mica K–Ar age dating was carried out for metapelites in the Hakoishi sub–unit and a meta–pillow basalt in the Tobiishi sub–unit of the Kurosegawa belt (Kamimura et al., 2012), Yatsushiro district, Kyushu, Japan. The Hakoishi sub–unit suffered the lawsonite–blueschist facies metamorphism with peak conditions of 0.7–0.9 GPa and