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Picnic Tree Mine

Past Producer in Fremont county in Colorado, United States with commodities Uranium, Vanadium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Land status
  18. Ownership information
  19. Production statistics
  20. Reserves and resources
  21. Links to other databases
  22. Bibliographic references
  23. General comments
  24. Reporter information

Geologic information

Identification information

Deposit ID 10013182
MRDS ID D009330
Record type Site
Current site name Picnic Tree Mine
Alternate or previous names Picnic Tree Claims, Hall Homestead, Picnic Tree-Hall
Related records 10142262

Geographic coordinates

Geographic coordinates: -105.52614, 38.53668 (WGS84)
Elevation 2451
Relative position 9.2 MILES N66W OF PARKDALE

Site location context

Political divisions (FIPS codes)

Fremont(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Hall Gulch(quadrangle 1:24,000 scale)

Pikes Peak(quadrangle 1:100,000 scale)

Pueblo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Arkansas Headwaters(hydrologic unit)

Upper Arkansas(hydrologic accounting unit)

Upper Arkansas(hydrologic subregion)

Arkansas-White-Red(hydrologic region)

Geographic areas

Country State County
United States Colorado Fremont

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 017S 073W 26 NE OF NW OF SW Colorado

Comments on the location information

  • IN DRAINAGE AND VALLEY OF MIDDLE TALLAHASSEE CREEK ; INFO FROM LAND.ST :(1982)

Commodities

Commodity Importance
Uranium Primary
Vanadium Critical Secondary

Materials information

Materials Type of material
Coffinite Ore
Uraninite Ore
Hematite Gangue
Limonite Gangue

Alteration

  • (Local) Oxidation; Alteration Of Feldspar To Clay

Mineral occurrence model information

Model code 204
USGS model code 30c
Deposit model name Sandstone U

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Wall Mountain Tuff Was Probable Principal Uranium Source
    Rock description Wall Mountain Tuff Was Probable Principal Uranium Source
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Mudstone > Claystone
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Mudstone > Bentonite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff
    Rock unit name Tallahassee Creek Conglomerate, Tallahassee Creek Ash Fall Member
    Rock description Tallahassee Creek Conglomerate, Tallahassee Creek Ash Fall Member
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)

Nearby scientific data

(1) -105.52614, 38.53668
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Thirtynine Mile Volcanic Field, Currant Creek Basin
Type of structure Local
Structure description Echo Park Graben, Paleovalleys, Fault Blocks

Ore body information

  • General form TABULAR, PODS
    Thickness 9.14M
    Depth to top 15.24M
    Depth to bottom 106.68M

Controls for ore emplacement

  • 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.

Comments on the geologic information

  • 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.

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Tallahassee Creek

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Cyprus Mines Corp., Wyoming Minerals
    Home office Denver, Co.
    First year 1982
  • Type Owner
    Owner Cyprus Mines Corp.
    Home office Denver, Co.
    First year 1982

Production statistics

  • Year 1967
    Period 1958-1967
    Material ORE U3O8
    Ore mined 12270mt
    Accuracy Accurate
    Description Cp_Grade: ^0.20% U308
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major U3O8 Ore Uranium Uranium 23.93mt 0WT%

Reserves and resources

  • Type In-situ
    Name U3O8
    Estimate year 1981
    Total resources 1000000kg commodity
    Commodity Subtype Grade units Group Importance Year
    Uranium 0.08 wt-pct Uranium Major 1981

Comments on the reserve resource information

  • 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.
  • AVERAGE ORE GRADE 0.08% U308

Comments on the workings information

  • OPEN PITS, DRILLING

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit THE DEPOSIT LIES ON THE UPRAISED FAULT ROCK THAT BOUNDS THE EASTERN/SOUTHEASTERN EDGE OF THE HANSEN DEPOSIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1982 Collins, Donna B. Colorado Geological Survey
Updater 14-JUN-2004 Keller, John W. Colorado Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

  • Cyprus Mines Corp. — now part of Subsidiary of Freeport-McMoRan (2007)
    Merged with AMAX into Cyprus Amax (1993); then to Phelps Dodge (1999); then to Freeport-McMoRan (2007).

Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.