TrekGEO > Mineral Trail > Kanto region > Saitama pref. > Sepiolite

Japanese page

Sepiolite

Okura Mine

Minamikawa, Hanno city, Saitama pref., Japan

Sepiolite

Field of view: 5 mm. Sepiolite associated with calcite. The columnar group of the pale green fibers is sepiolite. The pale green color is due to Mn replacing Mg. The surrounding massive brown parts are aggregate of fine caryopilite and quartz crystals. The pale pink grain at the lower right is rhodochrosite.

Recovered from a sepiolite vein in a chert-hosted bedded manganese deposit subjected to Pumpellyite-Actinolite facies metamorphism.

Sepiolite from this location was described in 1982.

Other localities

  • Kuzu-u (Limestone, Crust)
  • Hiiragiyama (Dolomite Skarn, Crust)
  • Okura Mine (Bedded Mn, Fibrous)
Copyright (c) 2017 NariNari, All Rights Reserved.