[ Top ] [ Japanese ]

Shirakamidake Granitic Complex

Invalid synonym: Shirakamidake Complex, Shirakamidake Granites

• Type locality: seashore along Cape Sugo - Ira river - Tsubai river, Iwasaki, Fukaura city, Nishitsugaru county, Aomori prefecture
• Plutonic rocks
• Late Cretaceous (65.6 Ma, 91.3 - 97.8 Ma, K-Ar; 110.0 Ma, Rb-Sr)
• Intruded by: Aplite, Pegmatite, Rhyolite, Andesite

• Lithofacies: Hornblende-biotite tonalite, Hornblende-biotite granodiorite, Biotite granite

• Distribution (Width): 4 km or narrower
• Distribution (Length): 15 km
• Upper limit: Unconformity (Fujikuragawa Formation)

• Distribution: Cape Sugo, Iwasaki, Fukaura city, Nishitsugaru county, Aomori pref.; Omagoshi - Mokurenji river - Iragawa river - Tsubai river - Shirakami river, Fukaura city, Nishitsugaru county, Aomori pref.; Mount Shirakami, Aomori pref.; Kawaratai, Nishimeya city, Nakatsugaru county, Aomori pref.; Iwadate, Happo city, Yamamoto county, Akita pref.

• Watanuki et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.7, pp.533-549 DOI
• Ozawa et al. (1983) Geology of the Nakahama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 62p. (in Japanese with English abstract 4p.)
• Moritani (1968) Geology of the Fukaura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 5p.)
• Ozawa (1963) Iwadate, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 14p. (in Japanese with English abstract 3p.)