Mann Ranch

Past Producer in Jefferson county in Colorado, United States with commodities Radium, Uranium, Vanadium
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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  13. Ownership information
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10190959
MRDS ID D009852
MAS/MILS ID 0080590015
Record type Site
Current site name Mann Ranch
Alternate or previous names Mann Mine
Related records 10101826

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -105.17528, 39.62999 (WGS84)
Elevation 1854

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 005 S 070 W 12 E2 Colorado

Commodities

Commodity Importance
Radium Tertiary
Uranium Tertiary
Vanadium Critical Tertiary

Materials information

Materials Type of material
Pyrite Unknown
Quartz Unknown
Uraninite Unknown

Nearby scientific data

Ore Body (1) -105.17528, 39.62999

Economic information

Ore body information

  • Strike N40W
    Dip 50W
    Depth to top 22.9M
    Field Value
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 IRREGULAR
    Type of Orebody #2 FISSURE VEIN
    Shape of Orebody #2 TABULAR
    Type of Orebody #3 SEDIMENTARY
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin RESIDUAL CONCENT
    Primary Ore Control FAULTING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 SILICIFICATION
    Strike And Dip N40W:50W
    Minimum Depth to Top 15.3
    Date of Last Modification 780213

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1954
Year of first production 1955

Mining district

District name Front Range

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner J. L. Mann Uranium
    Interest 100
    Home office Colorado
    Year 1975

Reference information

Bibliographic references

  • Deposit

    MINE MAP REPO # 404110 -403952 OWN/OP: URANIUM ENTERPRISE

General comments

Subject category Comment text
Deposit THE MODE OF ORIGIN IS STILL BEING DEBATED BETWEEN A HYDROTHE ORIGIN AND AN EPIGENETIC ORIGIN WHEREBY URANIUM WAS CARRIED SOLUTION BY GROUNDWATERS. ADDITIONAL INFORMATION FROM DMEA REPORT, DOCKET NO. 4382, DA 1956: AT THE TIME OF THE REPORT, THE CLAIM LEASER WAS URANIU PRISES, COLO. THE CLAIMS COMPRISE THE SE 1/4, NE 1/4 AND NE SE 1/4 OF SEC. 12, T. 5 S., R. 70 W., 6TH P.M. AT THE TIME O REPORT, PRODUCTION CONSISTED OF TWO SHIPMENTS, 6 TONS AVERAGE % U308, AND 900 TONS AVERAGING .30% U308. INCLUDED IN THE DM PORT ARE LOCATION AND GEOLOGIC MAPS. THE DMEA REPORT CONCLUD LIMITED ASSISTANCE FOR EXPLORATION BE APPROVED. ADDITIONAL INFORMATION IN BACKUP FILE.

Reporter information

Type Date Name Affiliation Comment
Reporter 27-FEB-1984 Minecom U.S. Bureau of Mines

Beyond USGS

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

External references

Authoritative Colorado resources

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