Nishizawa Mine
Kawamata, Nikko city, Tochigi pref., Japan
Occurrence
Low temperature hydrothermal Au-Ag deposit in rhyolitic tuff of the late Miocene (7.2 Ma) Oku-Kinu Rhyolites. The Oku-Kinu Rhyolites are eruption products of the Oku-Kinu Caldera.
Reported Minerals
- Gold
- Silver
- Cassiterite
- Barite
- Proustite
- Pyrargyrite
- Xanthoconite
- Matildite
- Cerargyrite
- Ferberite
- Wolframite
- Laumontite
Mineral Assemblages
- Quartz(Gangue) - Pyrargyrite/Proustite - Xanthoconite
- Quartz(Gangue) - Silver band - Matildite
- Quartz(Gangue) - Ferberite
Localities
- Shobusawa (Izu Peninsula)
- Seikoshi Mine (Izu Peninsula)
- Toi Mine (Izu Peninsula)
- Tensho Mine (Izu Peninsula)
- Takatama Mine (Gold/Silver deposit)
- Nishizawa Mine (silver sulfides)
- Nebasawa Mine (Gold/Silver deposit)
- Hishikari Mine (Kyusyu Island)