Axinite-(Fe)
Otaki, Chichibu city, Saitama pref., Japan
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.
Other localities
- Chichibu Mine (Hornfels, Tabular)
- Kami-Ochiai (PrP facies, Tabular)
- Obira Mine (Pneumatolytic Skarn, Tabular)