Ludwigite
Kawamata city, Date county, Fukushima pref., Japan
Field of view: 5 mm. Ludwigite associated with forsterite. The veins of black fibers are ludwigite. The surrounding grayish-green host is massive aggregate of granular forsterite.
Recovered from a ludwigite vein in peridotite subjected to contact metamorphism by S-type (Ilmenite-series) granodiorite. Formed in the Late Cretaceous (100 Ma).
Ludwigite from this location was described in 1952.
Other localities
- Hayama Mine (Metamorphosed peridotite, Fibrous)
- Kurotani (Metamorphosed peridotite, Fibrous)