TrekGEO > Mineral Trail > Tohoku region > Fukushima pref. > Nagakuki

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Hanawa city, Higashi-Shirakawa county, Fukushima pref., Japan

Closed to collecting




S-type (Ilmenite-series) skarn

Skarn formed by granite of the Late Cretaceous (100 Ma) Tabito pluton, a member of the S-type (Ilmenite-series) Abukuma granitic rocks. Silicate and aluminosilicate skarn minerals are unusually large. The age of the Tabito pluton by K-Ar radiometric dating of hornblende and biotite.


Outcrop of skarn. This skarn is composed of large crystals of porous quartz, grossular, and clinozoisite. The brown parts of this photograph are grossular, and the white parts are quartz. Grossular-rich zone and clinozoisite-rich zone are strictly separated.

Reported Minerals

Mineral Assemblages

  • Grossular - Quartz - Epidote
  • Vesuvianite - Grossular - Calcite - Quartz
  • Grossular - Scheelite
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