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  3. Mineral Resource Data System (MRDS)

Los Ochos Uranium Mine

Past Producer in Saguache 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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Ownership information
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10190987
MAS/MILS ID 0081090017
Record type Site
Current site name Los Ochos Uranium Mine
Alternate or previous names Thornburg Mine

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -106.75982, 38.3581 (WGS84)
Elevation 2745

Site location context

Political divisions (FIPS codes)

Saguache(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sawtooth Mountain(quadrangle 1:24,000 scale)

Saguache(quadrangle 1:100,000 scale)

Montrose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Tomichi(hydrologic unit)

Gunnison(hydrologic accounting unit)

Gunnison(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CO)

Bureau of Land Management CO BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Colorado Saguache

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 047 N 002 E 04 Colorado

Commodities

Commodity Importance
Uranium Tertiary

Materials information

Materials Type of material
Autunite Unknown
Torbernite Unknown
Uraninite Unknown

Nearby scientific data

Ore Body (1) -106.75982, 38.3581
ListMap

Economic information

Ore body information

  • Strike N84E
    Dip 85S
    Thickness 2.5M
    Length 56M
    Width 26M
    Depth to top 0M
    Field Value
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 PIPELIKE
    Type of Orebody #2 BRECCIA FILL
    Type of Orebody #3 FISSURE VEIN
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control FRACTURING
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 SILICIFICATION
    Type of Wallrock Alter. #2 ADV ARGILLIC
    Type of Wallrock Alter. #3 SERICITIC
    Strike And Dip N84E:85S
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 780213

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1954
Year of first production 1958

Mining district

District name Cochetopa District

Mineral rights holdings

Type of mineral rights Located Claim

Ownership information

  • Type Owner
    Owner Homestake Mining Co.
    Interest 100
    Home office California
    Year 1975

Comments on the ownership information

  • OWNER=HOMESTAKE MINING COMPANY: ADDRESS=650 CALIFORNIA ST. 9 SAN FRANCISCO,CALIFORNIA 94108 THE LOS OCHOS URANIUM DEPOSIT OCCURS IN A NORTHEASTERLY ING ZONE OF SHEARING AND FRACTURING AT THE CONTACT OF GRANIT SCHIST OF PRECAMBRIAN AGE WITH THE MORRISON FORMATION OF JUR AGE NEAR THE INTERSECTION WITH A LARGE EAST-TRENDING FAULT. INTERSECTIONS OF NORTHEAST-TRENDING SHEAR ZONES WITH EAST-TR FAULTS ARE THE MOST OBVIOUS ORE CONTROL. PITCHBLENDE WAS DEP UNDER EPITHERMAL CONDITIONS DURING TERTIARY TIME. THE SEQUEN EVENTS IN THE FORMATION OF THE DEPOSIT ARE:(1)THE MORRISON A DAKOTA FORM. WERE DEPOSITED ON PEGRANITE AND SCHIST DURING J TIME.(2)IN TERTIARY TIME INTENSE FAULTING OCCURRED. FAULTING CIATED THE MORRISON FM AND GRANITE ADJACENT TO IT PROVIDING SPACES FOR POST-FAULTING ORE BEARING SOLUTIONS. (3)POST-MINE TION MOVEMENT OCCURRED ON THE FAULTS OF THE LOS OCHOS MINE.

Reference information

Bibliographic references

  • Deposit

    INFORMATION SOURCES: GUIDEBOOK TO URANIUM DEPOSITS OF THE WE

  • Deposit

    UNITED STATES;1959, U.S.A.E.C.

  • Deposit

    MALAN,R. AND RANSPOT,H.,1959,GEOLOGY OF

  • Deposit

    URANIUM DEPOSITS OF THE COCHETOPA MINING DISTRICT: ECONOMIC

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.

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:

  • Homestake Mining Co. — acquired by Subsidiary of Barrick Gold (2001)
    Operator of the historic Homestake Mine in South Dakota; acquired by Barrick Gold in 2001.

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.