Nanataki fall
Omurozasu, Doshi city, Minamitsuru county, Ymanashi pref., Japan
Occurrence
Intermediate acidic metasomatic rocks of low-T silicified zone
Alteration zone in Tanzawa Group, Miocene - Pliocene trough-fill deposit.
Silicified zone in Tanzawa Group. The black zone at the right of the coin is the center of the silicified zone. Sedimentary rocks at the both sides of the black zone are replaced by quartz and it turns white.
Reported Minerals
- Quartz
- Gypsum
- rutile
Mineral Assemblages
- Quartz - Pyrite - Gypsum - Rutile
Localities
- Narayama (Rhyolite, Ferrierite-K)
- Katsura Island (Rhyolite, Ferrierite-Mg)
- Kita-Tomida (Dacite, Chalcedony)
- Shibusawa Mine (Gypsum deposit)
- Nanataki fall (Pyrite)
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)