Mine detail: Ascension Mine

Previously called 'Nair ProspectNare Lease'

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Location

Lat / long:

39.77971, -105.29086

Resource(M)

Primary:	Uranium
Tertiary:	Copper, Lead
Ore:	Chalcopyrite, Galena, Pyrite, Uraninite
Gangue:	Ankerite, Calcite, Fluorite, Quartz
Discovery year:	1955

Production

Operation type:	Unknown
Deposit type:	Vein
Production size:	Small
Development status:	Producer
First production started:	1956
Last production ended:	1972

Geology

Host rock:	Idaho Springs Formation-Hornblende Gneiss Unit
Host type:	Gneiss
Associated rock:	Granitic Pegmatite
Associated type:	Pegmatite
Structure:	Front Range Uplift, Denver Basin, Hurricane Hill Fault System, Ascension Fault
Tectonic:	Central Cordillera (Southern Rocky Mts)

References

MRDS	D010153
DEP	10107989
Reference	{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. 190}{Deposit:: SHERIDAN, DOUGLAS M. AND OTHERS, 1967, GEOLOGY AND URANIUM DEPOSITS OF THE RALSTON BUTTES DISTRICT, JEFFERSON COUNTY, COLORADO: USGS PROF. PAPER 520.}{Deposit:: SIMS, P.K., AND SHERIDAN, D.M., 1964, GEOLOGY OF URANIUM DEPOSITS IN THE FRONT RANGE, COLORADO: USGS BULL. 1159, P. 92-93}{Production:: SHERIDAN AND OTHERS, 1967, P. 75; COLORADO DIV. MINES ANN. OPERATORS REPTS. 1957-1972}
Reporter	Banke, Carl M., Spanski, Gregory T.