Oshima Tonalite

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Oshima Tonalite

Type locality: Oshima island, Niihama city, Ehime prefecture
Plutonic rocks
Cretaceous
Intruded by: Waita Granite, Felsic rock dikes
Intruded in: Habu Granodiorite, Ryoke Metamorphic Rocks

Lithofacies: Hornblende biotite tonalite
Lithofacies (Minor): Hornblende biotite quartz diorite
Structures: Weakly foliated

Older Ryoke Granitoids (Niihama, Ehime pref.)
[ Young ]
~~~~~~~~~~~~~~
Waita Granite
~~~~~~~~~~~~~~
Oshima Tonalite
~~~~~~~~~~~~~~
Habu Granodiorite
~~~~~~~~~~~~~~
[ Old ]

Ryoke Belt
[ Young ]
~~~~~~~~~~~~~~
Ryoke Metamorphic Rocks
~~~~~~~~~~~~~~
Younger Ryoke Granitoids
~~~~~~~~~~~~~~
Older Ryoke Granitoids
~~~~~~~~~~~~~~
[ Old ]

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

Distribution: Oshima island - Kuroshima island, Niihama city, Ehime pref.

Aoya et al. (2013) Geology of the Niihama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 181p. (in Japanese with English abstract 3p.)