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Tremolite

Waga-Sennin Mine

Sennin, Waga village, Kitakami city, Iwate pref., Japan

Tremolite

Field of view: 50 mm. Tremolite associated with pyrite. The columnar groups of white fibers are tremolite. The yellow cubes are pyrite. The massive white to gray host is aggregate of fine calcite crystals.

Recovered from an oxidative metazomatic zone combined with skarn formed by contact metamorphism of S-type (Ilmenite-series) granodiorite. Formed in the middle Miocene (15 Ma).

Tremolite from this location was described in 1919.

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