Description
Al Newman, Monarch Exploration Co.
Commodities
PrimaryUranium
TertiaryCopper, Zinc, Lead
Commodity typeM
Deposit
Deposit sizeS
Orebody formirregular, tabular, lenticular
Ore controlNortheast-Trending Fault Zone And Pegmatite
Materials
Ore mineralsPitchblende, Uraninite, Uranophane
GangueBoltwoodite, Chalcocite, Chalcopyrite, Covellite, Galena, Limonite, Marcasite, Pyrite, Sphalerite
Geology
Host rockSchist · Mica Gneiss And Schist
Associated rockPegmatite · Pegmatite
StructureChester Fault, Sawatch Range, San Juan Volcanic Field
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationSericitization; Alteration Of Biotite To Fe Oxides; Supergene Alteration Of Uranium Minerals
Economic & production
Development statusPast Producer
First production1956
Last production1960
Discovery year1956
Identification
Deposit ID10013115
MRDS IDD009219
RegionNA
Data scoreB
Coordinates38.39417, -106.28449
References
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.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.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.RANSPOT, H.W., 1958, GEOLOGY AND URANIUM DEPOSITS OF THE INDIAN CREEK AREA, GUNNISON AND SAGUACHE COUNTIES, COLORADO: UNIV. COLORADO M.S. THESISNELSON-MOORE, J.L., COLLINS, D.B., AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULL. 40, P. 391NELSON-MOORE AND OTHERS, 1978