Ittanda Mine
Tsuzuraya, Miwa village Mino-Kamo city, Gifu pref., Japan
Occurrence
Albite-Epidote-hornfels facies bedded Manganese deposit
Chert-hosted bedded manganese deposit in a chert block of the Middle Jurassic (165 Ma) Kamiaso unit, a member of the Tanba-Mino-Ashio accretionary complex. The age of chert is Late Triassic (230 Ma) to Middle Jurassic (165 Ma). Ore of this deposit is composed of neotocite with minor amount of rhodochrosite. This deposit has probably been subjected to Albite-Epidote-hornfels facis contact metamorphism. Ages of sedimentary rocks were determined by radiolarians.
Entrance of an adit on the outcrop of bedded chert of the Kamiaso Unit. Ore of this deposit is very simple and is composed of neotocite and rhodochrosite. Neotocite in this deposit was described as penwithite before.
Reported Minerals
- Neotocite
- Rhodochrosite
Mineral Assemblages
- Quartz(Host chert) - Neotocite - Rhodochrosite
History
- 1940: A local person discovered the deposit.
- 1950: Local people started to mine maganese oxide ore.
- 1955: The mine was closed.
- 1962: Started to mine maganese ore.
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)