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

Mann Ranch

Past Producer in Jefferson county in Colorado, United States with commodities Uranium, 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 10101826
MRDS ID D009852
Record type Site
Current site name Mann Ranch
Alternate or previous names Mann Mine, Vanadium Queen Mine
Related records 10190959

Geographic coordinates

Geographic coordinates: -105.16947, 39.63416 (WGS84)
Elevation 1768
Relative position 1.75 MILES S 40DEG 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 NW OF SE OF NE Colorado

Comments on the location information

  • ON SOUTH SIDE OF TURKEY CREEK AT BOTTOM OF HOGBACK, JUST ACROSS CREEK FROM FOUR CORNERS MINE ; INFO FROM LAND.ST :(1976)

Commodities

Commodity Importance
Uranium Primary
Molybdenum Tertiary

Materials information

Materials Type of material
Uraninite Ore
Ilsemannite Gangue
Pyrite Gangue

Analytical data

Result ORE GRADES RANGED FROM 0.21 TO 0.27% 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) Colorado Group
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
    Depth to bottom 30.48M

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
Year of first production 1955
Year of last production 1961

Mining district

District name Foothill District

Land status

Ownership category Private

Production statistics

  • Year 1955
    Material ORE U
    Accuracy Accurate
    Description Ap_Grade: ^0.21% U308
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Ore Uranium Uranium 0wt-pct
  • Year 1956
    Material U308
    Accuracy Accurate
    Description Ap_Grade: ^0.36% U308
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Uranium Uranium 0wt-pct
  • Year 1958
    Material 030 U
    Accuracy Accurate
    Description Ap_Grade: ^0.14% U308
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Uranium Uranium 0wt-pct
  • Year 1961
    Period 1955-1961
    Material ORE U
    Accuracy Accurate
    Description Cp_Grade: ^0.27% U308
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Ore Uranium Uranium 0wt-pct

Comments on the production information

  • ESTIMATED FIGURES FOR 1961 CALCULATED FROM DIFFERENCE BETWEEN RICHTER'S TOTAL FOR 1955-60 AND NELSON-MOORE AND OTHERS' CUMULATIVE TOTAL FOR 1955-61.

Workings at the site

  • Type of workings Underground
    Length 204.22M
    Overall length 158.5M

Comments on the workings information

  • 50-FT TUNNEL DRIVEN SE AND SSE. SECOND TUNNEL DRIVEN N80E FOR 320 FT, THENCE INTO APPROX 300 FT OF DRIFTS TO NW AND SE

Comments on development

  • PRODUCTION FROM OLDER ADIT WAS 6 TONS AT 0.21% U308. TOTAL PRODUCTION THRU 1961 WAS 2893 TONS AT 0.27% U308 YIELDING 15579 LB U308

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit URANIFEROUS ASPHALTIC MATERIAL (PROBABLY RELATED TO OIL SEEPS IN AREA) OCCURS IN ELONGATED WEDGES IN EITHER KASSLER OR UPPER SANDSTONE MEMBERS OF SOUTH PLATTE FM ON FOOTWALL OF DAMMING FAULT. ORE EXTENDS DOWNWARD ALONG BEDDING 10 TO 30 FT FROM FAULT. SIZE AND GRADE OF ORE DECREASE UPWARD ALONG FAULT PLANE. 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 Banke, Carl M. 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.