Mine detail: Mary L. Group

Previously called 'Mary L. 1-6 Claims'

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Location

Lat / long:

38.58279, -105.52475

Resource(M)

Primary:	Uranium
Ore:	Coffinite, Torbernite, Uraninite
Gangue:	Calcite, Gypsum, Hematite, Limonite, Pyrite
Orebody form:	TABULAR, PODS, LENTICULAR BODIES
Discovery year:	1954

Production

Operation type:	Surface-Underground
Production size:	Small
Development status:	Past Producer
First production started:	1955

Geology

Host type:	Sandstone
Associated rock:	Wall Mountain Tuff Was Probable Principal Uranium Source
Associated type:	Rhyolite
Structure:	Thirty Nine Mile Volcanic Field, Currant Creek Basin, Echo Park Graben, Paleovalleys; North-South Trending Reverse Fault Places Precambrian Granite And Schist Against Tertiary Sandstones, Limiting Ore Body On East. Fault Strikes N 35-45 W, Dips 40 Ne; Numerous Small Faults And Fractures Increased Permeability Of Sediments
Tectonic:	Central Cordillera (Southern Rocky Mountains)
Alteration processes:	Oxidation; Alteration Of Feldspar To Clay

References

MRDS	D009328
DEP	10013180
Reference	{Deposit:: NELSON-MOORE, J.L., COLLINS, D.B. AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: Colorado Geological Survey Bulletin 40,P. 150.}{Deposit:: EPIS, R.C., WOBUS, R.A. AND SCOTT, G.R., 1979, GEOLOGIC MAP OF THE BLACK MOUNTAIN QUADRANGLE, FREMONT AND PARK COUNTIES, COLORADO: USGS MAP I-1195, 1:62,500.}{Deposit:: DICKINSON, K.A., 1981, GEOLOGIC CONTROLS OF URANIUM MINERALIZATION IN THE TALLAHASSEE CREEK URANIUM DISTRICT, FREMONT COUNTY, COLORADO: THE MOUNTAIN GEOLOGIST, V. 18, NO. 4, P. 88-94.}{Deposit:: SIMON, M.R., 1956, URANIUM DEPOSITS OF CENTRAL AND SOUTH-CENTRAL COLORADO, IN GUIDEBOOK TO THE GEOLOGY OF THE RATON BASIN, COLORADO: ROCKY MOUNTAIN ASSOCIATION OF GEOLOGISTS GUIDEBOOK, P. 84.}{Deposit:: BABCOCK, J.A., 1980, TALLAHASSEE CREEK URANIUM DEPOSITS: DENVER REGIONAL EXPLORATION GEOLOGISTS SOCIETY GUIDEBOOK, P. 15-31.}{Deposit:: MACPHERSON, B.A., 1959, GEOLOGY AND URANIUM DEPOSITS OF THE TALLAHASSEE CREEK DISTRICT, FREMONT COUNTY, COLORADO: US ATOMIC ENERGY COMMISSION RME-1083, 39 P.}{Production:: NELSON-MOORE AND OTHERS, 1978}
Reporter	Collins, Donna B., Keller, John W.