Iwakuni Granite

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Iwakuni Granite

Plutonic rocks
Late Cretaceous (94 Ma, K-Ar)
Correlation (Same pluton?): Yasakakyo Granite
Intruded by: Rokuroshi Granite Porphyry Dike Swarms
Intruded in: Gamano Granodiorite, Kuga Group

Lithofacies: Biotite granite, Hornblende biotite granite

Hiroshima Granites (Iwakuni, Hiroshima pref.)
[ Young ]
~~~~~~~~~~~~~~
Nakayamagawa Complex
~~~~~~~~~~~~~~
Shimokuhara Granite
~~~~~~~~~~~~~~
Iwakuni Granite / Yasakakyo Granite
~~~~~~~~~~~~~~
Osogoe Complex
~~~~~~~~~~~~~~
Habu Granodiorite
~~~~~~~~~~~~~~
[ Old ]

Sanyo Belt (Hiroshima)
[ Young ]
~~~~~~~~~~~~~~
Hiroshima Granites
~~~~~~~~~~~~~~
[ Old ]

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

Distribution: Iwakuni - Hirata - Fujiyu - Tsuzu - Midoro - Hozu - Ogi, Iwakuni city, Yamaguchi pref.

Higashimoto et al. (1986) Geology of the Otake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 70p. (in Japanese with English abstract 6p.)
Higashimoto et al. (1983) Geology of the Iwakuni District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 6p.)