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

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Gozaisho Mine

Odaira, Tono village, Iwaki city, Fukushima pref., Japan


Field of view: 5 mm. Helvine associated with rhodonite. The green triangle is a cross section of tetragonal helvine. The surrounding massive reddish-brown host is aggregate of rhodonite.

Recovered from a bedded manganese deposit subjected to Epidote-Amphibolite facies regional metamorphism and contact metamorphism by granite.

Helvine from this location was described in 1975.

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