Ijimi Granodiorite

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Ijimi Granite Yoshida, 1961

Invalid synonym: Iwami Granite, Sakedani Tonalite

Type locality: Ijimi, Misato city, Ochi county, Shimane prefecture
Plutonic rocks
Eocene - Oligocene (31.6, 31.5, 31.2 Ma, K-Ar; 35.9 Ma, FT)
Intruded by: Quartz porphyry dikes
Intruded in: Nojiro Granite, Hakami Volcanic Rocks, Satsume Volcanic Rocks

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

Distribution (East - West): ca. 4 - 14 km
Distribution (South - North): ca. 28 km

Younger Inbi stage intrusive rocks
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Daito Granodiorite
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Ijimi Granite
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Shimokuno Granite
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Neu Granite
~~~~~~~~~~~~~~
Abire Granodiorite
~~~~~~~~~~~~~~
Otsukamiya Granite
~~~~~~~~~~~~~~
Fube Granite
~~~~~~~~~~~~~~
Ushirodani Granite
~~~~~~~~~~~~~~
Akana Granodiorite
~~~~~~~~~~~~~~
Onbara Granite
~~~~~~~~~~~~~~
Hiyodori Granite
~~~~~~~~~~~~~~

Sanin Belt
[ Young ]
~~~~~~~~~~~~~~
Tamagawa stage volcanic rocks
~~~~~~~~~~~~~~
Younger Inbi stage intrusive rocks
?--?--?--?--?-
Older Inbi stage intrusiv rocks
?--?--?--?--?-
Inbi stage volcanic rocks
~~~~~~~~~~~~~~
Mochigase stage intrusive rocks
?--?--?--?--?-
Mochigase stage volcanic rocks
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[ Old ]

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

Distribution: Ijimi, Misato city, Ochi county, Shimane pref.; Kubota - Kamihashinami, Izumo city, Shimane pref.; Satsume - Ushijiri, Oda city, Shimane pref.

Nishida (2013) Jour. Geol. Soc. Japan, vol.119, no.4, pp.229-248 DOI
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.)