The Picnic Tree Mine is a uranium mine located in Fremont county, Colorado at an elevation of 8,041 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 8,041 Feet (2,451 Meters)
Commodity: Uranium
Lat, Long: 38.53667, -105.52556
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Picnic Tree Mine MRDS details
Site Name
Primary: Picnic Tree Mine
Secondary: Picnic Tree Claims
Secondary: Hall Homestead
Secondary: Picnic Tree-Hall
Commodity
Primary: Uranium
Secondary: Vanadium
Location
State: Colorado
County: Fremont
District: Tallahassee Creek
Land Status
Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Cyprus Mines Corp.
Home Office: Denver, Co.
Years: 1982 -
Owner Name: Cyprus Mines Corp., Wyoming Minerals
Home Office: Denver, Co.
Years: 1982 -
Production
Year: 1967
Time Period: 1958-1967
Mined: 12270.000 mt
Material type: ORE U3O8
Description: Cp_Grade: ^0.20% U308
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Surface-Underground
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Model Name: Sandstone U
Orebody
Form: TABULAR, PODS
Structure
Type: R
Description: Thirtynine Mile Volcanic Field, Currant Creek Basin
Type: L
Description: Echo Park Graben, Paleovalleys, Fault Blocks
Alterations
Alteration Type: L
Alteration Text: Oxidation; Alteration Of Feldspar To Clay
Rocks
Name: Rhyolite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Oligocene
Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age Young: Oligocene
Name: Rhyolite
Role: Associated
Age Type: Host Rock Unit
Age Young: Oligocene
Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age Young: Oligocene
Analytical Data
Not available
Materials
Ore: Uraninite
Ore: Coffinite
Gangue: Limonite
Gangue: Hematite
Comments
Comment (Deposit): THE DEPOSIT LIES ON THE UPRAISED FAULT ROCK THAT BOUNDS THE EASTERN/SOUTHEASTERN EDGE OF THE HANSEN DEPOSIT
Comment (Geology): DEPOSITS LOCALIZED AND PRESERVED BY SLUGGISH GROUNDWATER MOVEMENT IN AREA. THOSE CONDITIONS STILL PRESENT AS EVIDENCED BY ARTESIAN PRESSURE IN WELLS AND SPRINGS ISSUING FROM ECHO PARK FORMATION AND BY A PRESENT URANIUM CONTENT OF GROUNDWATER IN AREA AS HIGH AS 900 PPB.
Comment (Location): IN DRAINAGE AND VALLEY OF MIDDLE TALLAHASSEE CREEK ; INFO FROM LAND.ST :(1982)
Comment (Reserve-Resource): Deposit was drilled by Cyprus Mines Corp. in late 1970s and early 1980s. Information from Dickinson (1981). The Hansen orebody is the largest know deposit in the district.
Comment (Reserve-Resource): AVERAGE ORE GRADE 0.08% U308
Comment (Workings): OPEN PITS, DRILLING
References
Reference (Deposit): NELSON-MOORE, J.L., COLLINS, D.B., HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULLETIN 40, P. 151.
Reference (Deposit): EPIS, R.C., WOBUS, R.A., SCOTT, G.R., 1979, GEOLOGIC MAP OF THE BLACK MOUNTAIN QUADRANGLE, FREMONT AND PARK COUNTIES, COLORADO: USGS MAP I-1195, 1:62,500.
Reference (Deposit): DICKINSON, K.A., 1981, GEOLOGIC CONTROLS OF URAINUM MINERALIZATION IN THE TALLAHASSEE CREEK URANIUM DISTRICT, FREMONT COUNTY, COLORADO: THE MOUNTAIN GEOLOGIST, V. 18, NO. 4, P. 88-94.
Reference (Deposit): BABCOCK, J.A., 1980, TALLAHASSEE CREEK URANIUM DEPOSITS: DENVER REGIONAL EXPLORATION GEOLOGISTS SOCIETY GUIDEBOOK, P. 15-31.
Reference (Production): NELSON-MOORE AND OTHERS, 1978
Reference (Reserve-Resource): BABCOCK, 1980
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
