Mine detail: North Star Mine

Previously called ''

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Location

Lat / long:

39.86055, -105.2978

Resource(M)

Primary:	Copper
Tertiary:	Lead, Silver, Zinc, Uranium
Ore:	Bornite, Chalcocite, Covellite, Malachite, Pitchblende, Uranophane
Discovery year:	1895

Production

Operation type:	Unknown
Deposit type:	Vein
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	Idaho Springs Formation-Microcline-Quartz-Plagioclase-Biotite Gneiss Unit
Host type:	Gneiss
Associated rock:	Granitic Pegmatite
Associated type:	Pegmatite
Structure:	Front Range Uplift, Denver Basin, Rogers Fault Zone
Tectonic:	Central Cordillera (Southern Rocky Mountains)
Alteration processes:	Breccia Fragments Are Reported As Being Altered

References

MRDS	D010160
DEP	10101834
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. 193-194}{Deposit:: SHERIDAN, DOUGLAS M. AND OTHERS, 1967, GEOLOGY AND URANIUM DEPOSITS OF THE RALSTON BUTTES DISTRICT JEFFERSON COUNTY, COLORADO: USGS PROF. PAPER 520.}{Deposit:: ADAMS, J.W., AND OTHERS, 1953, URANIUM OCCURRENCES IN THE GOLDEN GATE CANYON AND RALSTON CREEK AREAS, JEFFERSON COUNTY, COLORADO: USGS CIRC. 320}{Production:: ORIGINAL CRIB RECORD}
Reporter	Banke, Carl M., Spanski, Gregory T.