TrekGEO > Mineral Trail > Koshinetsu region > Yamanashi pref. > Datolite

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Nakanokura, Minobu city, Minami-Koma county, Yamanashi pref., Japan


Field of view: 10 mm. Datolite associated with prehnite. The translucent white parts are datolite exphibiting no cleavage. The pale green parts at the bottom and at the upper right are prehnite.

Recovered from a prehnite-calcite vein in basaltic-andesitic hyaloclastite subjected to Prehnite-Pumpellyite facies metamorphism. Formed in the middle Miocene (12 Ma).

Datolite from this location was described in 1982.

Other localities

  • Chibayama (PrP facies, Granular)
  • Kami-Ochiai (PrP facies, Axinite)
  • Nakayashiki (PrP facies, Prehnite)
  • Obira Mine (Skarn, Axinite)
  • Toroku Mine (Skarn, Axinite)
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