[ Top ] [ Japanese ]

Hiroshima Granites

• Type locality: Sanyo region, Western Japan
• Plutonic rocks
• Late Cretaceous (115 - 70 Ma, K-Ar, 105- 85 Ma, Rb-Sr; Younger than Younger Ryoke Granitoids)
• Intruded by: Ondo Dike Swarms, Northern Kure Dike Swarms, Nisogi-Myojinyama Dike Swarms, Ishidakeyama Dike Swarms, Ishiuchi-Konigata Dike Swarms, Dolerite
• Intruded in: Yoshiwa Group, Yuki Formation, Tsuno Group, Nishiki Group, Hikimi Group, Norosan Welded Tuff, Haigamine Formation, Kamagari Formation, Kuga Group

• Sedimentary facies: Batholith
• Lithofacies: Ilmenite series
• Lithofacies: Biotite granite
• Lithofacies (Minor): Quartz diorite, Hornblende biotite granite, Gabbro, Hornblende biotite granodiorite, Granodiorite porphyry

• Magnetic susceptibility: 100 x 10^-6 emu/g or less
• Upper limit: Unconformity (Setouchi Volcanic Rocks, Yokoyama Andesite, Gokurakuji Gravel, Terrace Deposits)

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

• Distribution: Otagawa river - Tsuda - Kujima - Akutani - Hariyama - Mount Megahirayama - Yoshiwa - Kumazaki - Ono town - Tsuzurawara - Hachimangawa river - Nogakogen - Ohara - Yuzuri - Mitaraigawa river - Miyauchi - Tsukuneshima island - Ujinajima island - Kanawajima island, Hatsukaichi city, Hiroshima pref.; Utsuodani - Numata town - Kuchi - Gion town - Ishigatanigawa river - Fushidani - Yoshiyama - Koitoge pass - Hatatao pass - Ushita - Hesaka - Mount Dakeyama - Mount Takanosuyama - Mount Togoyama - Uokiri dam - Mount Madogayama - Mitakidera - Mount Arataniyama - Mount Notoroyama - Mount Gongenyama - Mount Takedayama - Mount Koganeyama - Ebasarayama - Yahatagawa river - Nukushina - Tateishi - Mount Hinourayama - Shiroyama - Mount Rengejiyama - Mount Gosasozan - Oyama - Nakafukagawa - Mount Takaoyama - Mount Chojayama - Mount Iwatakiyama - Mount Sobagajoyama, Hiroshima city, Hiroshima pref.; Lake Oyamadaike - Ichinohata - Morichika - Tosei - Mount Kagamiyama - Mount Tabusayama - Mount Yaseizan - Kurose dam - Mount Ryuozan, Higashihiroshima city, Hiroshima pref.; Taibi, Saka city, Aki county, Hiroshima pref.; Togochi, Akiota city, Yamagata county, Hiroshima pref.; Hatachi - Mount Osakoyama - Mount Doshoyama - Mount Kanagatoroyama, Kumano city, Aki county, Hiroshima pref.; Nagase valley, Yoshika city, Kanoashi county, Shimane pref.; Okayama pref.; Yamaguchi pref.; Shodoshima island, Kagawa pref.; Ehime pref.

• Terabayashi et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.8, pp.599-612 DOI
• Tatsumi et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.12, pp.661-679 DOI
• Kawamura (2010) Jour. Geol. Soc. Japan, vol.116, no.1, pp.27-44 DOI
• Fujita and Yokoyama (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.89-107 DOI
• Kishi et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.9, pp.479-491 DOI
• Matsuura et al. (1999) Geology of the Itsuku Shima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 37p. (in Japanese with English abstract 3p.)
• 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.)
• Takagi and Mizuno (1999) Geology of the Kaitaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 49p. (in Japanese with English abstract 4p.)
• Takahashi (1991) Geology of the Hiroshima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 41p. (in Japanese with English abstract 3p.)
• Takahashi et al. (1989) Geology of the Tsuda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 56p. (in Japanese with English abstract 4p.)
• 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. (1985) Geology of the Kure District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (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.)
• Huzita and Kasama (1982) Geology of the Osaka-Seihokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 8p.)
• Mitsuno and Omori (1965) Susai, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 59p. (in Japanese with English abstract 17p.)