Presentation Information
[R6P-02]Petrography of the granitic and metamorphic rocks in Minami-Zao and Kuriko areas, central part of Abukuma Belt, Northeast Japan
*Jun-ichi Maruyama1, Shin-ichi Kagashima2 (1. Yamagata Uni. Sci., 2. Yamagata Uni.)
Keywords:
Abukuma Belt,granitic rock
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Cretaceous granitoids and metamorphic rocks are located in Minami-Zao and Kuriko areas in the central part of Abukuma Belt. Granitoids are classified as granite to tonalite. Metamorphic rocks are mainly pelitic gneiss, and amphibolite. As a result of the bulk composition of granitoids, examination of compositional trends including other granitoids from the central Abukuma Belt revealed three trends, which are divided into Zao, Nanyo-Hiyama, and Shirabu-Inawashiro. This is thought to reflect the difference in the source material or the difference in the crystallization process.
Cretaceous granitoids and metamorphic rocks are located in Minami-Zao and Kuriko areas in the central part of Abukuma Belt. Granitoids are classified as granite to tonalite. Metamorphic rocks are mainly pelitic gneiss, and amphibolite. As a result of the bulk composition of granitoids, examination of compositional trends including other granitoids from the central Abukuma Belt revealed three trends, which are divided into Zao, Nanyo-Hiyama, and Shirabu-Inawashiro. This is thought to reflect the difference in the source material or the difference in the crystallization process.