Inakuraishi mine, Furubira, Shakotan peninsula, Shiribeshi Province, Hokkaido, Japan
|Latitude & Longitude (WGS84):||43° 9' North , 140° 38' East|
|Latitude & Longitude (decimal):||43.15000,140.63333|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
Largest manganese deposit in Japan. (1944 production: 72,000 tons @ 27% Mn, mainly from rhodochrosite.) Mine now closed. En echelon hydrothermal rhodochrosite veins in Tertiary volcanosedimentary rocks. The largest vein had a strike of 900 meters, x 5m thick. Has produced many beautiful rhodochrosite specimens now widely distributed in collections.
18 valid minerals. 1 erroneous literature entry.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Pliocene - Miocene|
2.588 - 23.03 Ma
|Miocene-Pliocene mixed volcanic, volcaniclastic and sedimentary rocks|
Age: Neogene (2.588 - 23.03 Ma)
Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.