Ijimi Granodiorite

Ijimi Granite Yoshida, 1961

Invalid synonym: Iwami Granite, Kasubuchi Granite

Type locality (Main facies): Hamahara dam - Ijimi - Futagodani, Misato city, Ochi county, Shimane prefecture
Type locality (Migmatite): Sawadani - Chihara, Misato city, Ochi county, Shimane prefecture
Plutonic rocks
late Eocene - early Oligocene (31.6, 31.5, 31.2 Ma, K-Ar; 35.9 Ma, FT)
Intruded by: Nodayama Complex, Quartz porphyry dikes, Porphyrite dikes, Rhyolite dikes
Intruded in: Nojiro Granite, Hakami Volcanic Rocks, Satsume Volcanic Rocks, Ochi Group, Kotani Formation, Sakurae Group, Akana Granodiorite, Takahata Granite, Onbara Granite, Shimotone Body, Takayama Volcanic Rocks, Tsuremizu Volcanic Rocks, Yugakaigawa Volcanic Rocks, Sakedani Tonalite

Sedimentary facies (Minor): Dikes
Lithofacies: Biotite granite
Lithofacies (Minor): Quartz diorite, Tonalite, Hornblende biotite granodiorite, Granite porphyry
Sedimentary structures (Minor): Miarolitic

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

Distribution: Hamahara dam - Ijimi - Futagodani - Sawadani - Chihara, Misato city, Ochi county, Shimane pref.; Hanbe - Takubo, Kawamoto city, Ochi county, Shimane pref.; Kubota - Kamihashinami, Izumo city, Shimane pref.; Satsume - Ushijiri - Nobata, Oda city, Shimane pref.

Nishida (2013) Jour. Geol. Soc. Japan, vol.119, no.4, pp.229-248 DOI
Kano et al. (2001) Geology of the Yunotsu and Gotsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 129p. (in Japanese with English abstract 5p.)
Kano et al. (1998) Geology of the Iwami-Oda and Oura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 118p. (in Japanese with English abstract 5p.)
Hattori et al. (1983) Geology of the Sambesan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 168p. (in Japanese with English abstract 7p.)