Mine detail: Lookout No. 22 Mine

Previously called ''

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Location

Lat / long:

38.39417, -106.28449

Resource(M)

Primary:	Uranium
Tertiary:	Copper, Zinc, Lead
Ore:	Pitchblende, Uraninite, Uranophane
Gangue:	Boltwoodite, Chalcocite, Chalcopyrite, Covellite, Galena, Limonite, Marcasite, Pyrite, Sphalerite
Orebody form:	irregular, tabular, lenticular
Discovery year:	1956

Production

Operation type:	Surface
Production size:	Small
Development status:	Past Producer
First production started:	1956
Last production ended:	1960

Geology

Host rock:	Mica Gneiss And Schist
Host type:	Schist
Associated rock:	Pegmatite
Associated type:	Pegmatite
Structure:	Chester Fault, Sawatch Range, San Juan Volcanic Field
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Sericitization; Alteration Of Biotite To Fe Oxides; Supergene Alteration Of Uranium Minerals

References

MRDS	D009219
DEP	10013115
Reference	{Deposit:: WRIGHT, R.J., AND EVERHART, D.L., 1960, URANIUM--MARSHALL PASS DISTRICT, IN DEL RIO, S.M., MINERAL RESOURCES OF COLORADO-FIRST SEQUEL: COLORADO STATE MINERAL RESOURCES BOARD, P. 357-359.}{Deposit:: OLSON, J.C., 1977, PRELIMINARY GEOLOGIC MAP OF PART OF THE PAHLONE PEAK QUADRANGLE, GUNNISON, SAGUACHE, AND CHAFFEE COUNTIES, COLORADO: USGS OPEN-FILE REPT. 77-325.}{Deposit:: GROSS, E.B., 1965, A UNIQUE OCCURRENCE OF URANIUM MINERALS, MARSHALL PASS, SAGUACHE COUNTY, COLORADO: AM. MINERALOGIST, V. 50, NOS. 7-8, P. 909-923.}{Deposit:: RANSPOT, H.W., 1958, GEOLOGY AND URANIUM DEPOSITS OF THE INDIAN CREEK AREA, GUNNISON AND SAGUACHE COUNTIES, COLORADO: UNIV. COLORADO M.S. THESIS}{Deposit:: NELSON-MOORE, J.L., COLLINS, D.B., AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULL. 40, P. 391}{Production:: NELSON-MOORE AND OTHERS, 1978}
Reporter	Schwochow, Stephen D.