TrekGEO > Mineral Trail > Kanto region > Gunma pref. > Allanite-(Ce)

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Sori, Azuma town, Midori city, Gunma pref., Japan


Field of view: 30 mm. Euhedral crystals of allanite-(Ce) included in plagioclase of granite. The long black prisms in relatively large white plagioclase are allanite-(Ce). The surrounding host is compolsed of black biotite, gray quartz, and white plagioclase.

Recovered from an enclave in Ilmenite-series) granite. Formed in Crataceous (145 - 66 Ma).

Allanite-(Ce) from this location was described in 1969.

Other localities

  • Daibosatsu Pass (Pegmatite, Prismatic)
  • Ote (Granite, Prismatic)
  • Kusaki (Granite, Prismatic)
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