Mindat Logo

Johkoku mine (Jôkoku; Jokoku mine), Kaminokuni, Oshima peninsula, Hokkaido Island, Japan

Hydrothermal rhodochrosite veins mined for manganese and base metals. This was once the largest of Japan's numerous manganese mines; now closed. (1958 production: 105,652 tons crude rhodochrosite.) The Uwaban No. 5 vein also carried nickel minerals in a dolomite veinlet.





Mineral List:
Acanthite
Actinolite
Ankerite
Annabergite
Argyrodite
Arsenopyrite
Calcite
var: Manganoan Calcite

Chalcopyrite
'Chlorite Group'
Coronadite
Cryptomelane
Dolomite
Epidote
Galena
Geocronite
Gersdorffite
Goethite
Hexahydrite
Ilesite
Jôkokuite (TL)
Kaolinite
Kutnohorite
Lepidocrocite
Lithiophorite
Mallardite
Manganite
Marcasite
Millerite
Nickeline
Nsutite
Pararammelsbergite
Pentlandite
Plumbogummite
Polybasite
Pyrargyrite
Pyrite
Pyrite
var: Bravoite

Pyrolusite
Quartz
var: Chert
Rhodochrosite
'Sericite'
Silver
Sphalerite
Stephanite ?
Szmikite
Szomolnokite
Talnakhite ?
Tetrahedrite
var: Argentian Tetrahedrite

Violarite
'Wad'
Zincmelanterite


52 entries listed. 45 valid minerals. 1 type locality (valid mineral).

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!
This page is currently not sponsored. Click here to find out how you can sponsor this page.


Mineral and/or Locality
Google
 
www.mindat.org Web
Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 21st Nov 2009 14:39:54