TrekGEO > Mineral Trail > Kanto region > Gunma pref. > Mogurazawa Mine

Japanese page

Mogurazawa Mine

Kamibishi, Hishi village, Kiryu city, Gunma pref., Japan


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.

Mogurazawa Mine

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

Mineral Assemblages

  • Hausmannite - Jacobsite - Alleghanyite - Pyrochroite - Manganosite - Sonolite - Rhodochrosite
  • Rhodonite - Quartz - Nagashimalite
  • Rhodonite - Quartz - Suzukiite - Roscoelite
  • Rhodonite - Tetrahedrite - Pyrite
Copyright (c) 2023 NariNari, All Rights Reserved.