Gamano Granodiorite

Gamano Granodiorite (Okamura, 1957) Matsuura, 1997

Invalid synonym: Gamano Gneissose Granodiorite

Type locality: Gamano, Suooshima city, Oshima county, Yamaguchi prefecture
Plutonic rocks
Late Cretaceus (100.0 - 94.7 Ma, 89.5, 84 Ma, K-Ar; U-Pb; 95.1 Ma, CHIME, 102.1, 91.3, 86.6 Ma, Rb-Sr)
Intruded by: Kibe Granite, Tengadake Migmatite, Tajiri Granite, Nakayamagawa Complex, Iwakuni Granite, Takatoyama Felsite Dike Swarms, Towa Granodiorite
Intruded in: Kuga Group

Lithofacies: Hornblende biotite granodiorite, Biotite granodiorite, Tonalite
Lithofacies (Minor): Hornblende biotite granodiorite, Garnet biotite granodiorite, Biotite granite, Tonalite, Quartz diorite
Structures: Foliated, Enclaves (Banded gneiss)

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

Distribution: Tsuzu - Yuu - Ikachi - Tajiri - Yokomichi - Maeba - Kuroshima island, Iwakuni city, Yamaguchi pref.; Hizumi, Yanai city, Yamaguchi pref.; Yashiro island - Gamano - Maeshima island, Suooshima city, Oshima county, Yamaguchi pref.; Tanoshirihana cape, Suooshima city, Oshima county, Yamaguchi pref.; Murotsu peninsula, Kaminoseki city, Kumage county, Yamaguchi pref.; Tsukari - Kurokui, Hikari city, Yamaguchi pref.; Komatsubara, Shunan city, Yamaguchi pref.

Ikeda et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.2, pp.167-182 DOI
Terabayashi et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.8, pp.599-612 DOI
Kamitomo et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.2, pp.88-91 DOI
Matsuura (1997) Geology of the Kurahashi Jima and Hashira Jima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 53p. (in Japanese with English abstract 4p.)
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.)