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La Raza

Past Producer in Baja California, Mexico with commodity Tungsten
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Controls for ore emplacement
  11. Economic information about the deposit and operations
  12. Mining district
  13. Ownership information
  14. Production statistics
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10049022
MRDS ID MX00230
Record type Site
Current site name La Raza
Related records 10133641

Geographic coordinates

Geographic coordinates: -116.00081, 32.25008 (WGS84)
Elevation 1500
Relative position 600 M W OF LOS GAVILANES, NE CORNER OF EL TOPO AREA.

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

San Diego(quadrangle 1:250,000 scale)

Geographic areas

Country State
Mexico Baja California

Comments on the location information

  • ESTIMATE TO WITHIN 1 KM

Commodities

Commodity Importance
Tungsten Critical Primary

Materials information

Materials Type of material
Scheelite Ore
Diopside Gangue
Garnet Gangue

Mineral occurrence model information

Model code 42
USGS model code 14a
Deposit model name W skarn

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Metamorphic Rock > Hornfels
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
  • Host or associated Host
    Rock type Metamorphic Rock > Skarn (Tactite)

Nearby scientific data

(1) -116.00081, 32.25008
ListMap

Economic information

Controls for ore emplacement

  • Igneous/Carbonate Contact

Comments on the geologic information

  • DEPOSIT IN SMALL PENDANT OF MM ROCK, 21M X 13M X 16M, IN QUARTZ DIORITE AND BIOTITE DIORITE. PENDANT CONSISTS MAINLY OF GARNET-DIOPSIDE TACTITE WITH SUBORDINATE HORNFELS AND SCHIST. PROBABLE COMPLETE REPLACEMENT OF THIN LIMESTONE BEDS. THREE OTHER LARGER PENDANTS OF HORNFELS AND SCHIST WITH MINOR TACTITE OCCUR NEAR THE MINE. NNE-TRENDING PEGMATITE DIKES MORE NUMEROUS THAN AT OTHER MINES IN THE AREA.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Los Gavilanes District

Ownership information

  • Type Owner
    Owner Cia. Minera Del Gran Oeste (Circa
    Last year 1945

Production statistics

  • Year 1943
    Material ORE W
    Accuracy Estimate
    Description Ap_Grade: ^Ave. 1.3% Wo3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Ore Tungsten Tungsten 1wt-pct

Comments on the production information

  • MOST OF ORE WAS MINED FROM SMALL GLORY HOLE IN SW CORNER OF OPEN-PIT.

Reserves and resources

  • Type In-situ
    Estimate year 1945
    Commodity Subtype Grade units Group Importance Year
    Tungsten Wo3 1.2 wt-pct Tungsten Major 1945

Comments on the reserve resource information

  • ESTIMATED 150 TO 200 TONS OF ORE FROM AREA AROUND THE N END OF THE VERTICAL SHAFT. REMOVAL WOULD RESULT IN THE DESTRUCTION OF THE SHAFT.

Workings at the site

  • Type of workings Surface/Underground
    Length 70M

Comments on the workings information

  • EXPLORED BY SMALL GLORY HOLE AND 70 M OF UNDERGROUND WORKINGS; INCLUDING VERTICAL SHAFT, INCLINE SHAFT, AND SHORT DRIFTS AND CROSSCUTS. ORE BODY CUT OFF BY DIORITE 2 M BELOW FIRST UNDERGROUND LEVEL.

Reference information

Bibliographic references

  • Deposit

    FRIES, CARL AND SCHMITTER, EDUARDO, 1945, SCHEELITE DEPOSITS IN THE NORTHERN PART OF SIERRA DE JUAREZ NORTHERN TERRITORY LOWER CALIFORNIA, MEXICO: USGS BULL 946-C, P. 73-101

  • Production

    FRIES AND SCHMITTER, 1945, P. 83.

General comments

Subject category Comment text
Deposit SCHEELITE- BEARING TACTITE IN TWO PARALLEL ZONES THAT JOIN AT THE N END OF OPEN-CUT AGAINST INTRUSIVE CONTACT WITH BIOTITE DIORITE BODY. WESTERNMOST ZONE WAS MINED.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1987 Staude, John-Mark G. (Page, Norman J.) U.S. Geological Survey
Updater 01-OCT-1987 Leonard, Kenneth R. 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