TrekGEO > Mineral Trail > Shikoku region > Kagawa pref. > Pyrophyllite

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Nekoyama mine

Nagano, Manno city, Nakatado county, Kagawa pref., Japan


Field of view: 2 mm. Massive pyrophyllite. The group of platy white crystals and massive pale green parts are pyrophyllite. The light brown crusts are limonite.

Recovered from a pyrophyllite deposit formed by pyrophyllitization alteration of granite and associated hornfels in a low-pressure regional metamorphic belt by andesite. Formed in the middle Miocene (13 Ma).

Pyrophyllite from this location was described in 1934.

Other localities

  • Nekoyama (Pyrophyllitization, Platy)
  • Yoji Mine (Pyrophyllitization, Platy)
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