Osaka
Kunikami, Minano city, Chichibu county, Saitama pref., Japan
Synonym
Kanasaki
Occurrence
Greenschist facies serpentinite
Serpentinite in Mikabu Unit of Sanbagawa Belt. This serpentinite block contais calcite veins, and mined as ophicalcite. This serpentinite block is lens-shaped and is concordant with schistosity of Sanbagawa Metamorphic Rocks.
Outcrop of serpentinite associated with calcite veins in Mikabu Unit. This serpentinite was mined for construction material by the name "Ophicalcite". White veins in this photograph are calcite, and tremolite veins may be included in other parts of this locality. The dark reddish-green host is serpentinite. Calcite veins are undulated and do not last long. Veins are aligned in a direction, not randam.
Reported Minerals
- Tremolite
- Calcite
- Talc
Mineral Assemblages
- Serpentinite - Tremolite
- Serpentinite - Calcite
Localities
- Orihara (Talc, High-P)
- Matsunaga Mine (Talc, High-P)
- Arai (Diopside, High-P)
- Osaka (Ophicalcite, High-P)
- Miyazawa (Dolomite, High-P)
- Onara (Fe-Ni, High-P)
- Yashio mine (Fe-Cr, High-P)