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Nibetsu Granite Kim, 1969

Invalid synonym: Nibetsu Tertiary Granite

• Type locality: Nibetsu Akita city, Akita prefecture
• Plutonic rocks
• Stock
• Miocene - Pliocene (7.2, 6.0, 4.4 Ma, K-Ar, FT)
• Intruded in: Taiheizan Granodiorite, Onnagawa Formation, Haginari Formation, Okuramata Formation

• Lithofacies: Granite porphyry
• Lithofacies (Minor): Quartz diorite, Trondhjemite, Granodiorite, Granophyre

• Distribution (East-West): 4 km
• Distribution (North-South): 4 km

• Distribution: Nibetsu, Akita city, Akita pref.; Yodo river, Kyowa, Daisen city, Akita pref.

• Kano et al. (2012) Geology of the Aniai District, 2nd Edition, 1:50,000 Quadrangle Series, Geological Survey of Japan, AIST, 59p. (in Japanese with English abstract 4p.)
• Ozawa et al. (1981) Geology of the Taiheizan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 4p.)
• Huzioka et al. (1977) Geology of the Akita District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 5p.)