Mindat Logo

Geco Mine, Manitouwadge, Thunder Bay District, Ontario, Canada

A copper-zinc mine located 200 km East of Thunder Bay near Manitouwadge. Ore is an Archean Cu-Zn massive sulfide deposit. Mine is at least to the 2,850 level.

This volcano-sedimentary deposit has been affected by an amphibolite facies metamorphism (T=650 °C, P=6 kb) resulting in the formation of rocks such as gedrite-cordierite gneisses (cf. Petersen, 1984).

References

Canadian Mineralogist (1982): 20: 549-553.

Petersen, E.U. (1984), Economic Geology: 81(2): 323-342.

Stevenson, R.K. and Martin, R.F. (1986) Implications of the presence of amazonite in the Broken Hill and Geco metamorphosed sulfide deposits. Canadian Mineralogist: 24: 729-745.

Contributions to Mineralogy and Petrology (1989): 101(3)(March): 350-360.


Mineral List

Acanthite
Actinolite
Almandine
Andradite
Biotite
Cassiterite
Chalcopyrite
'Chlorite Group'
Cordierite
Corundum
Epidote
Ferronigerite-2N1S
Gahnite
Gedrite
Hercynite
Högbomite
Ilmenite
Magnetite
Microcline
var: Amazonite

Muscovite
var: Sericite

Phlogopite
Pyrite
Pyrosmalite-(Fe)
Pyrosmalite-(Mn)
Pyrrhotite
Quartz
Rutile
Sillimanite
Staurolite
Sudoite
Thaumasite
Zircon


32 entries listed. 27 valid minerals.

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 locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
This page is currently not sponsored. To sponsor this page click here.


Mineral and/or Locality
Search Google
 
Copyright © Jolyon Ralph and Ida Chau 1993-2011. Jobs in Ontario, Canada 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. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: 18th Oct 2011 11:24:04
Mineral and Locality Search
Mineral:
and/or Locality:
Options
Fade toolbar when not in focusFix toolbar to bottom of page
Hide Social Media Links
Slideshow frame delay seconds