Commodities
PrimaryUranium
SecondaryMolybdenum
Commodity typeM
Deposit
Deposit sizeM
WorkingsSurface/Underground
Orebody formLENTICULAR
Materials
Ore mineralsIlsemannite, Jordisite, Uranophane
GangueCalcite, Clay, Gypsum, Jarosite, Limonite, Pyrite, Quartz
Geology
Host rockSandstone · Browns Park Formation
StructureWashakie Basin, Axial Basin, Lay Syncline, Maybell Monocline, Normal Fault (Unnamed)
Tectonic settingColorado Platform
AlterationOxidation Of Fe And U Minerals
Economic & production
Development statusProducer
First production1955
Discovery year1954
Identification
Deposit ID10107975
MRDS IDD008020
Alternate namesMarge Mine, Gertrude Pits, Trace Elements Pits
RegionNA
Data scoreB
Coordinates40.54719, -107.99511
References
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. 268, 271.MCKAY, E.J., AND BERGIN, M.J., 1974, GEOLOGIC MAP OF THE MAYBELL QUADRANGLE, MOFFAT COUNTY, COLORADO: USGS GQ-1145.WRIGHT, R.J., AND EVERHART, D.L., 1960, URANIUM, IN DEL RIO, S.M., MINERAL RESOURCES OF COLORADO-FIRST SEQUEL: COLO. STATE MINERAL RESOURCES BD., P. 343-347.KING, R.U., (UNPUBLISHED DATA)COLO. DIV. MINES ANN. OPERATOR REPTS.