Higashizawa Mine
Kami-Kasuo, Kanuma city, Tochigi pref., Japan
Occurrence
Hornblende-hornfels facies bedded manganese deposit
Chert-hosted bedded manganese deposit in the chert block of Kurohone-Kiryu Complex, a member of Jurassic accretionary complex of Tamba-Mino-Ashio Belt. The deposit was subjected to Hornblende-hornfels facies contact metamorphism by Kobugahara Granodiorite. Slate near this deposit was metamorphosed to Cordierite-bearing hornfels. Approximately 2 km apart from Kobugahara Granodiorite, the heat source.
Reported Minerals
- Rhodonite
- Pyrophanite
- Mn bearing tremolite
- Spessartine
- Tephroite
Mineral Assemblages
- Rhodonite - Mn bearing tremolite
- Rhodonite - Spessartine - Pyrophanite - Quartz
Localities
- Oashi Mine (Helvite)
- Hagidaira Mine (W, Bi, Te)
- Takanosu Mine (Axinite-(Mn))
- Higashizawa Mine (Axinite-(Mn))
Related Occurrences
- Bedded Mn (Diagenesis)
- Bedded Mn (Low-T zeolite facies)
- Bedded Mn (High-T zeolite facies)
- Bedded Mn (Prehnite-Pumpellyite facies)
- Bedded Mn (Pumpellyite-Actinolite facies)
- Bedded Mn (Greenschist facies)
- Bedded Mn (Epidote-Amphibolite facies)
- Bedded Mn (Amphibolite facies)
- Bedded Mn (Albite-Epidote-hornfels facies)
- Bedded Mn (Hornblende-hornfels facies)
- Bedded Mn (Pyroxene-hornfels facies)
- Ocean-floor Mn Nodule
- Ocean-floor Mn Crust
- Bedded Mn (Meteoric supergene)
- Bedded Mn (Marine supergene)