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Nishizawa Mine

Kawamata, Nikko city, Tochigi pref., Japan

Occurrence

Hydrothermal Au-Ag deposit

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

Mineral Assemblages

  • Quartz(Gangue) - Pyrargyrite/Proustite - Xanthoconite
  • Quartz(Gangue) - Silver band - Matildite
  • Quartz(Gangue) - Ferberite
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