Picnic Tree Mine

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

Name: Picnic Tree Mine  

State:  Colorado

County:  Fremont

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.


Satelite image of the Picnic Tree Mine

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


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