Mogurazawa Mine
Kamibishi, Hishi village, Kiryu city, Gunma pref., Japan
Occurrence
Albite-Epidote-hornfels facies bedded Manganese deposit
Chert-hosted bedded manganese deposit in Permian - Jurassic chert block of Kurohone-Kiryu Complex, a member of Jurassic accretionary complex of Tamba-Mino-Ashio Belt. The deposit was subjected to Albite-Epidote-hornfels facies contact metamorphism by Sori Granodiorite of Sori-type Granitic Rocks. Approximately 10 km apart from Sori Granodiorite, the heat source. This deposit produces various V-bearing minerals, and the type locality of Nagashimalite and Suzukiite.
Adits mined the southern ore body. There are adits of 3 levels. There are outcrops of chert and slate of Kurohone-Kiryu Complex around these adits.
Reported Minerals
- Sulphure
- Tennantite
- Tetrahedrite
- Alabandite
- Bornite
- Pyrite
- Pyrrhotite
- Helvite
- Cymrite
- Hausmannite
- Manganosite
- Pyrochroite
- Sonolite
- Rhodochrosite
- Malachite
- Barite
- Manganese Calcite
- Rhodonite
- Suzukiite
- Nagashimalite
- Roscoelite
- Wiserite
- Tephroite
- Jacobsite
- Alleghanyite
- Spessartine
Mineral Assemblages
- Hausmannite - Jacobsite - Alleghanyite - Pyrochroite - Manganosite - Sonolite - Rhodochrosite
- Rhodonite - Quartz - Nagashimalite
- Rhodonite - Quartz - Suzukiite - Roscoelite
- Rhodonite - Tetrahedrite - Pyrite
Localities
- Mogurazawa Mine (V-bearing minerals)
- Kyurazawa Mine (Pyrosmalite-(Mn))
- Kurokawa Mine (Ni-bearing minerals)
- Kawazura Mine (Low AE facies)
- Daikei Mine (AE facies)
- Ittanda Mine (Neotocite)
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)