1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Four Corners Mine

Past Producer in Jefferson county in Colorado, United States with commodities Uranium, Vanadium, Molybdenum
Map
XML
JSON
KML
B
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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Production statistics
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10013507
MRDS ID D009851
Record type Site
Current site name Four Corners Mine
Alternate or previous names Pallaoro Lease, Morrison Mine

Geographic coordinates

Geographic coordinates: -105.17058, 39.63582 (WGS84)
Elevation 1780
Relative position 1.7 MILES S 40 E FROM MORRISON

Site location context

Political divisions (FIPS codes)

Jefferson(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Morrison(quadrangle 1:24,000 scale)

Denver West(quadrangle 1:100,000 scale)

Denver(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper South Platte(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Colorado Jefferson

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 005S 070W 12 SW OF NE OF NE Colorado

Comments on the location information

  • ON NORTH SIDE OF TURKEY CREEK AT BOTTOM OF DAKOTA HOGBACK, JUST ACROSS CREEK FROM MANN RANCH MINE ; INFO FROM LAND.ST :(1976)

Commodities

Commodity Importance
Uranium Primary
Vanadium Critical Secondary
Molybdenum Tertiary

Materials information

Materials Type of material
Uraninite Ore
Ilsemannite Gangue
Pyrite Gangue

Analytical data

Result PRINCIPAL ORE GRADES RANGED FROM 0.19 TO 0.23% U308, OVERALL 0.19% U308

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name South Platte Formation
    Rock description South Platte Formation
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -105.17058, 39.63582
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Denver Basin, Front Range Uplift
Type of structure Local
Structure description Golden Fault, Damming Fault

Ore body information

  • General form WEDGE, LENTICULAR
    Thickness 6.1M
    Length 18.29M
    Depth to bottom 25.91M

Controls for ore emplacement

  • Sandstone Permeability And Fault Control

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1954
Discoverer S.N. Strauss And R.W. Strauss
Year of first production 1955
Year of last production 1960

Mining district

District name Foothill District

Land status

Ownership category Private

Production statistics

  • Year 1955
    Accuracy Accurate
    Description Ap_Grade: ^0.19% U308
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major U3O8 Ore Uranium Uranium 0wt-pct
  • Year 1956
    Accuracy Accurate
    Description Ap_Grade: ^0.23% U308
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major U3O8 Uranium Uranium 0wt-pct
  • Year 1960
    Period 1955-1960
    Accuracy Accurate
    Description Cp_Grade: ^0.19% U308
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major U3O8 Ore Uranium Uranium 0wt-pct

Comments on the production information

  • NO PRODUCTION IN 1958 AND 1959. NELSON-MOORE AND OTHERS (1978) CITE V205 PRODUCTION. DISCREPANCY BETWEEN SOURCES AS TO TOTAL PRODUCTION; RICHTER'S FIGURES USED FOR ANNUALS, CUMUL. ORE, AND CUMUL. U308.

Workings at the site

  • Type of workings Unknown
    Length 114.3M
    Overall depth 22.86M
    Overall length 91.44M

Comments on the workings information

  • 75-FT VERTICAL SHAFT WITH LEVELS AT 62 AND 75 FT. DRIFTS ON 75-FT LEVEL EXTEND ABOUT 200 FT TO NW AND ABOUT 100 FT TO SE

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit URANINITE AND URANIFEROUS ASPHALT (PROBABLY RELATED TO OIL SEEPS IN AREA) COAT SAND GRAINS AND FILL INTERSTICES IN SANDSTONE AND TO SMALL EXTENT FILL FRACTURES IN DAMMING FAULT ZONE. SOME ORE IS SPHEROIDAL AND COMPOSED OF CONCENTRIC BANDS OF URANINITE AROUND PYRITE GRAIN. ORE BODIES ARE ELONGATED, THIN, DISCONTINUOUS WEDGES AND LENSES PARALLEL TO INTERSECTION OF DAMMING FAULT AND BEDDING. MOST MINED ORE CAME FROM HANGING WALL OF FAULT ALTHO SOME FOUND IN FOOTWALL. GOLDSTEIN (1957) BELIEVED URANIUM TO BE OF PRIMARY ORIGIN AND WAS PRECIPITATED FROM ASCENDING HYDROTHERMAL SOLUTIONS ALONG DAMMING FAULT AT ZONES OF FAVORABLE SANDSTONE PERMEABILITY.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1983 Schwochow, Stephen D. Colorado Geological Survey
Updater 01-MAY-1993 Spanski, Gregory T. U.S. Geological Survey

Beyond USGS

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

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.