Mine detail: Sunshine Mine

Previously called 'Sunshine No. 2Sunshine Claims'

Location:	Fremont County, Colorado, United States, North America
Lat / long:	38.53445, -105.48919
dep_id:	10013187
mrds_id:	D009335
Commodity type:	metallic
Major mineral:	Uranium
Operation type:	Unknown
Production size:	Small ammount of material produced
Development status:	Past Producer
ore:	Coffinite, Uraninite
gangue:	Hematite, Limonite
orebody_fm:	TABULAR, PODS, LENS-SHAPED
work_type:	Unknown
alteration:	Oxidation; Alteration Of Feldspar To Clay
conc_proc:	Concentration By Oxidized, Uranium-Bearing Groundwater Passing Through Areas With Localized Reducing Conditions Such As Carbonaceous Material (Mostly Wood Fragments) And Associated Pyrite In Fluvial Channel Sandstones.
ore_ctrl:	Deposition Controlled By Ground Water Flow Conditions And Carbonaceous Material With Associated Pyrite. Flow Was Impeded By The Fault On The Southern End Of The Echo Park Graben. Highest Grade Ore Near A Fault. Meanders May Have Helped To Localize Ore
Reporter:	Collins, Donna B.
hrock_unit:	Tallahassee Creek Conglomerate
hrock_type:	Rhyolite
arock_unit:	Wall Mountain Tuff Was Probable Principal Uranium Source
arock_type:	Rhyolite
Structure:	Thirty Nine Mile Volcanic Field, Currant Creek Basin, Echo Park Graben, Paleovalleys, Faults; Reverse Fault Strikes N18w, Dips 35ne
tectonic:	Central Cordillera (Southern Rocky Mountains)
disc_yr:	1954
discr:	George Oliver, Raymond Geim, Pete Wedel
References:	Deposit:: NELSON-MOORE, J.L., COLLINS, D.B. AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULLETIN 40, P. 152. Deposit:: WOBUS, R.A., EPIS, R.C. AND SCOTT, G.R., 1979, GEOLOGIC MAP OF THE COVER MOUNTAIN QUADRANGLE, FREMONT, PARK, AND TELLER COUNTIES, COLORADO: USGS MAP I-1179, 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, OPEN-FILE REPORT, 39 P. Production:: NELSON-MOORE AND OTHERS, 1978; MACPHERSON, 1959