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Last Chance Mine

Past Producer in Fremont county in Colorado, United States with commodity Uranium
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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. Links to other databases
  21. Bibliographic references
  22. Reporter information

Geologic information

Identification information

Deposit ID 10107980
MRDS ID D009326
Record type Site
Current site name Last Chance Mine
Alternate or previous names Last Chance Pit
Related records 10118209

Geographic coordinates

Geographic coordinates: -105.49391, 38.52529 (WGS84)
Elevation 2515
Relative position 6.5 MILES N 64 W OF PARKDALE

Site location context

Political divisions (FIPS codes)

Fremont(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gribble Mountain(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 072W 31,30 N2 OF NW OF NW OF NE (31); S2 OF SW OF SW OF SE (30) Colorado

Comments on the location information

  • NEAR TWELVE MILE HOLE; MINE IS ON LAST CHANCE NO. 1 CLAIM; PIT IS ON LAST CHANCE NO. 8 CLAIM ; INFO FROM LAND.ST :1980

Commodities

Commodity Importance
Uranium Primary

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 Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff
    Rock unit name Tallahassee Creek Conglomerate
    Rock description Tallahassee Creek Conglomerate
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)

Nearby scientific data

(1) -105.49391, 38.52529
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Thirty Nine Mile Volcanic Field, Currant Creek Basin
Type of structure Local
Structure description Echo Park Graben, Paleo Valleys

Ore body information

  • General form TABULAR, PODS
    Depth to top 27.43M

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 BLM Administrative Area

Ownership information

  • Type Owner
    Owner Charles Heisen
    First year 1980

Production statistics

  • Year 1966
    Period 1958-1966
    Material U ORE
    Accuracy Accurate
    Description Cp_Grade: ^0.31% U308
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Ore Uranium Uranium 0wt-pct

Comments on the workings information

  • OPEN PIT WITH UNDERGROUND WORKING EXTENDING OFF WALLS OF PIT; SECOND PIT ABOUT 600 FT SOUTH OF MAIN MINE

Reference information

Bibliographic references

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.

External references

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.