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Chichibu Tonalite
Invalid synonym: Chichibu Quartz Diorite
- Plutonic rocks
- late Miocene (6.8 - 5.3 Ma)
- Intruded by: Pyroxene hornblende andesite
- Intruded in: Ryokami Unit
- Lithofacies (Center): Magnetite series)
- Lithofacies (Marginal): Ilmenite series)
- Lithofacies: Biotite hornblende tonalite, Hornblende biotite tonalite
- Chichibu Tonalite
- [ North ]
- ~~~~~~~~~~~~~~
- North Body
- ~~~~~~~~~~~~~~
- South Body
- ~~~~~~~~~~~~~~
- [ South ]
------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Nakatsugawa, Chichibu city, Saitama pref.
- Hara et al. (2010) Geology of the Mitsumine District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 110p. (in Japanese with English abstract 4p.)