Cape Bentenzaki
Kodomari, Nakadomari city, Kita-Tsugaru county, Aomori pref., Japan
Occurrence
Neutral metasomatic rocks of Smectite zone
Montmorillonite deposit formed by hydrothermal smectitization alteration of rhyolite of Betenjima Rhyolite Member, early - middle Miocene Fuyube Formation.
Outcrop of rhyolite of Betenjima Rhyolite Member, Fuyube Formation. The rhyolite is subjected to smectitization alteration. The white outcrop is composed of montmorillonite, and gray blocks are perlite.
Reported Minerals
Mineral Assemblage
- Rhyolite(Host) - Montmorillonite
Localities
- Bentenzaki (Montmorillonite deposit)
- Fukaura (Lava, Celadonite)
Related Occurrences
- Halloysite zone (Alunite zone, Argillized zone)
- Kaolinite zone (Alunite zone, Argillized zone)
- Minamiite-Alunite zone (Alunite zone)
- Pyrophyllite zone
- Smectite zone (Argillized zone)
- Interstratified mineral zone (Argillized zone)
- Illite-Chlorite zone (Propylite zone)
- Epidote-Actinolite zone
- Stilbite-Mordenite zone (Zeolite zone)
- Heulandite-Analcime zone (Zeolite zone)
- Laumontite-Albite zone (Zeolite z., Propylite z.)
- Wairakite-Albite zone (Zeolite zone)