Kosugi
Kosugi, Ogose city, Iruma county, Saitama pref., Japan
Occurrence
Pumpellyite-Actinolite facies high-P metamorphic rocks
Minerals in pelitic schist of Sanbagawa Metamorphic Rocks. Lawsonite, an index mineral of Pumellyite-Acitinolite facie, is observed.
Outcrop of pelitic schist of Sanbagawa Metamorphic Rocks associated with lawsonite. The massive gray part above the coin is metachert, and the lower black part is pelitic schist. This is the historical outcrop where Professor Yotaro Seki of Saitama University first reported lawsonite from Kanto Mountains in 1957.
Reported Minerals
- Lawsonite
- Epidote
Mineral Assemblages
- Lawsonite - Quartz - Mica
Localities
- Kosugi (Lawsonite)
- Asahine (Pumpellyite)
- Kaiya (Omphacite)
- Mount Nyukasa (Omphacite)
Related Occurrences
- Albite-Epidote-hornfels facies
- Hornblende-hornfels facies
- Pyroxene-hornfels facies
- Sanidinite-hornfels facies