Mine detail: Schwartzwalder Mine

Previously called 'Ralston Creek Mine'

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Location

Lat / long: 39.84499, -105.28141

Resource(M)

Primary: Uranium
Secondary: Molybdenum
Tertiary: Copper, Lead, Zinc, Bismuth
Ore: Coffinite, Molybdenite, Pitchblende, Uraninite
Gangue: Ankerite, Bornite, Calcite, Chalcopyrite, Galena, Jordisite, Marcasite, Niccolite, Pyrite, Pyrrhotite, Quartz, Sphalerite
Orebody form: IRREGULAR TO LENTICULAR
Discovery year: 1949

Production

Operation type: Unknown
Production size: Medium
Development status: Past Producer
First production started: 1953

Geology

Host rock:Idaho Springs Formation
Host type:Quartzite,Schist,Gneiss
Structure:Front Range Uplift, Colorado Mineral Belt, Idaho Springs-Ralston Shear Zone, Rogers Fault Zone, Illinois Fault System
Tectonic:Central Cordillera (Southern Rocky Mtns)
Alteration processes:Chloritic And Potassic, Silicic; Replacement By Ankerite

References

MRDSD008019
DEP10107507
Reference{Deposit:: YOUNG, E.J., 1977, GEOLOGIC, RADIOMETRIC, AND MINERALOGIC MAPS AND UNDERGROUND WORKINGS OF THE SCHWARTZWALDER URANIUM MINE AND AREA, JEFFERSON COUNTY, COLORADO: USGS OPEN-FILE REPT. 77-725, 38 P.}{Deposit:: DOWNS, G.R., AND BIRD, A.G., 1965, THE SCHWARTZWALDER URANIUM MINE, JEFFERSON COUNTY, COLORADO: MTN. GEOLOGIST, V. 2, NO. 4, P. 183-191.}{Deposit:: SHERIDAN, D.M., AND OTHERS, 1967, GEOLOGY AND URANIUM DEPOSITS OF THE RALSTON BUTTES DISTRICT, JEFFERSON COUNTY, COLORADO: USGS PROF. PAPER 520.}{Deposit:: NELSON-MOORE, J.L., COLLINS, D.B., AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: COLORADO GEOLOGICAL SURVEY BULL. 40, P. 194-195. 5) SIMS, P.K., AND SHERIDAN, D.M., 1964, GEOLOGY OF URANIUM DEPOSITS IN THE FRONT RANGE, COLORADO: USGS BULL. 1159, P. 87-92. 5) SIMS, P.K., AND SHERIDAN, D.M., 1964, GEOLOGY OF URANIUM DEPOSITS IN THE FRONT RANGE, COLORADO: USGS BULL. 1159, P. 87-92.}{Deposit:: BUREAU OF MINES REPORT RI 7975 AND BUREAU OF MINES IC 7963}{Deposit:: Cotter Corp. corporate info., accessed from internet on 12/02/2005}
ReporterSchwochow, Stephen D., Spanski, Gregory T., Beach, Richard A.