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Axinite-(Fe)

Chichibu Mine

Otaki, Chichibu city, Saitama pref., Japan

Axinite-(Fe)

Field of view: 20 mm. A group of axinite-(Fe). The tabular purple crystals are axinite-(Fe). The surrounding brown host is hornfels encrusted with limonite.

Recovered from an open space of an axinite-(Fe) vein in hornfels near a moderately low-temperature hydrothermal deposit combined with skarn formed by contact metamorphism of I-type (magnetite-series) quartz diorite. Formed in the late Miocene (6 Ma).

Axinite-(Fe) from this location was described in 1939.

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