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Orikabe Plutonic Complex

Invalid synonym: Orikabezawa Body, Orikabe Quartz Monzonite

• Type locality: Orikabe, Ohasama town, Hanamaki city, Iwate prefecture
• Plutonic rocks
• A member of Volcano-plutonic complex with Niitsuki Formation
• Late Cretaceous (120 Ma, K-Ar)
• Intruded by: Senmaya Tonalitic Pluton, Hornblende porphyry dykes
• Intruded in: Hiraiso Formation, Osawa Formation, Saragai Group, Niitsuki Formation

• Sedimentary facies: Shallow intrusion
• Lithofacies: Quartz monzodiorite, Granodiorite
• Lithofacies (Minor): Granite, Gabbro, Quartz monzonite, Monzodiorite, Tonalite, Quartz diorite, Diorite, Quartz monzonite porphyry

• Distribution (East-West): 8 km
• Distribution (South-North): 20 km

------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Orikabe, Murone town, Ichinoseki city, Iwate pref.; Akaiwa - Mizunashi - Hada - Shijuni, Kesennuma city, Miyagi pref.

• Kawamura et al. (2013) Geology of the Hayachine San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 101p. (in Japanese with English abstract 4p.)
• Takeuchi and Mikoshiba (2002) Geology of the Senmaya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 76p. (in Japanese with English abstract 3p.)
• Kambe and Shimazu (1961) Kesennuma, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 73p. (in Japanese with English abstract 16p.)