Mindat Logo

Mena Mine (Hoffmeister Homestead Prospect; Black Judge Shaft; Nigger Shaft), Ralston Buttes District, Jefferson Co., Colorado, USA

REF:Deposit:: NELSON-MOORE, J.L., COLLINS, D.B., AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: COLORADO GEOL. SURVEY BULL. 40, P. 193
Deposit:: SHERIDAN, DOUGLAS M. AND OTHERS, 1967, GEOLOGY AND URANIUM DEPOSITS OF
Commodities (Major) - Uranium; (Trace) - Iron, Molybdenum, Bismuth, Nickel, Zinc, Silver, Copper, Lead
Development Status: Past Producer
Host Rock Unit: Idaho Springs Formation-Hornblende Gneiss Unit
Structure: Front Range Uplift, Denver Basin, Rogers Fault Zone
Host Rock: Sedimentary Breccia
Tectonic Structure: Central Cordillera (Southern Rocky Mts.)





Map Reference: 39°51'10"N , 105°18'7"W

Important Disclaimer: 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.

Switch between Map and Globe


Mineral List:
  • Ankerite
  • Bismuth
  • Bismuthinite
  • Bornite
  • Calcite
  • Chalcocite
  • Chalcopyrite
  • 'Chlorite Group'
  • Covellite
  • Digenite
  • Glaucodot
  • Gold
    var: Electrum
  • Magnetite
  • Marcasite
  • Maucherite
  • Molybdenite
  • Nickeline
  • Pararammelsbergite
  • Pyrite
  • Pyrrhotite
  • Quartz
       var: Amethyst
  • Rammelsbergite
  • Silver
  • Sphalerite
  • Stromeyerite
  • Tetrahedrite
  • Uraninite
    var: Pitchblende


    28 entries listed. 24 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 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 & Ida Ralph 1993-2009. Jobs in Colorado, USA 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.