Narukawa Granite

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Narukawa Granite Collaborative Research Group for the Ryoke Belt in the Ikoma Mountains, 1997

Type locality: Narukawa, Ikoma city, Nara prefecture
Plutonic rocks
Late Cretaceus (79.5 Ma, Rb-Sr; 82.0 Ma, U-Pb; 87.0 Ma, SHRIMP)
Transitional: Katano Granite
Intruded by: Taike Granite, Hornblende granodiorite porphyry dikes
Intruded in: Fukihata Quartz Diorite

Lithofacies: Hornblende biotite granite, Granodiorite
Structures: Weakly foliated

Younger Ryoke Granitoids (south Ikoma, Nara pref. - Osaka pref.)
[ Young ]
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Taike Granite
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Minamikawachi Granite
--------------
Omichi Granite
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Katagami Granite
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Katashimo Granodiorite
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Narukawa Granite
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[ Old ]

Ryoke Belt
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Ryoke Metamorphic Rocks
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Younger Ryoke Granitoids
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Older Ryoke Granitoids
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------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Narukawa, Ikoma city, Nara pref.; Yamatokoriyama city, Nara pref.

Miyachi et al. (2001) Geology of the Osaka-Tohokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 130p. (in Japanese with English abstract 6p.)
Miyachi et al. (1998) Geology of the Osaka-Tonambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 113p. (in Japanese with English abstract 5p.)