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Pearl Harbor

Occurrence 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. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10095819
MRDS ID MX00456
Record type Site
Current site name Pearl Harbor
Related records 10303701

Geographic coordinates

Geographic coordinates: -115.91276, 32.24036 (WGS84)
Relative position NEAR CENTER OF THE 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

El Centro(quadrangle 1:250,000 scale)

Geographic areas

Country State
Mexico Baja California

Comments on the location information

  • ESTIMATE TO WITHIN 1.0 KM.

Commodities

Commodity Importance
Tungsten Critical Primary

Materials information

Materials Type of material
Scheelite Ore
Axinite Gangue
Calcite Gangue
Garnet Gangue
Quartz Gangue
Vesuvianite Gangue

Analytical data

Result 0.5-0.7% WO3.

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 > Metasedimentary Rock > Marble

Nearby scientific data

(1) -115.91276, 32.24036
ListMap

Economic information

Ore body information

  • Strike N 15 E
    Dip 65-70 W
    Length 60M
    Width 1M

Comments on the geologic information

  • TUNGSTEN DEPOSITS LIE IN A LONG PENDANTLIKE EXTENSION, ABOUT 20 M WIDE, OF A LARGE BODY OF METAMORPHIC ROCK. PENDANT CONSISTS MAINLY OF HORNFELS AND SCHIST, IN CONTACT ON BOTH SIDES WITH INTRUSIVE DIORITE. FIVE SEPARATE BODIES OF MARBLE OCCUR IN A NNE TRENDING ZONE WITHIN THE PENDANT. THE MIDDLE BODY OF MARBLE, WHICH HOSTS THE TUNGSTEN DEPOSITS, IS COMPRISED OF TWO PARALLEL BEDS, STRIKING N 15 E AND DIPPING 65-70 W, BOTH OF WHICH ARE CUT OFF BY DIORITE. THE EASTERN BED IS 60 M LONG AND 7 M WIDE, AND THE WESTERN BED IS 45 M LONG AND 2-3 M WIDE. TACTITE SHEETS FROM 0.5-1.0 M WIDE EXTEND ALONG THE EASTERN SIDES OF THE MARBLE BEDS.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Sierra De Juarez/Cerro El Topo

Comments on the reserve resource information

  • SEE GENERAL COMMENTS. ABOVE ESTIMATE ASSUMES AVERAGE MINING WIDTH OF 1.2 METERS.

Comments on the workings information

  • EASTERN ORE BODY: OPEN PIT AND 3-METER ADIT. WESTERN ORE BODY: TRENCH 7 M LONG, 1.5 M WIDE, AND 1.5 M DEEP.

Comments on development

  • ABOUT 15 TONS OF ORE GRADING 0.5-0.7% WO3 WAS SORTED OUT DURING EXPLORATION OF THE PROSPECT, BUT APPARENTLY WAS NEVER SHIPPED.

Reference information

Bibliographic references

  • Deposit

    FRIES, CARL, JR., AND SCHMITTER, EDUARDO, 1945, SCHEELITE DEPOSITS IN THE NORTHERN PART OF THE SIERRA DE JUAREZ, NORTHERN TERRITORY, LOWER CALIFORNIA, MEXICO: U.S. GEOLOGICAL SURVEY BULLETIN 946-C, P.85, 91-92, PLATE 26

General comments

Subject category Comment text
Deposit SCHEELITE OCCURS IN TACTITE ALONG EAST SIDE OF TWO MARBLE BEDS. GANGUE IS MAINLY GARNET IN EASTERNMOST TACTITE ZONE, WESTERN ZONE CONTAINS ABUNDANT EPIDOTE. BEST ORE EXPOSED IN EASTERN ZONE CONSISTED OF COARSELY CRYSTALLINE GARNET, VESUVIANITE, CALCITE, QUARTZ, AND AXINITE. EASTERN ORE BODY: 0.2 TO 1.0 METER IN WIDTH WITH APPARENT LENGTH OF 60 METERS. WESTERN ORE BODY: 0.1 TO 0.5 METERS WIDE AND ABOUT 40 METERS LONG.
Deposit INFERRED MAXIMUM TONNAGE OF ORE IN EASTERN ZONE EQUAL TO ABOUT 3,000 TONS AVERAGING ROUGHLY 0.5% WO3. AN ADDITIONAL AMOUNT OF BARREN ROCK OF ALMOST EQUAL TONNAGE WOULD HAVE TO BE REMOVED. IN THE WESTERN ZONE, ABOUT 500 TONS OF BARREN ROCK WOULD HAVE TO BE REMOVED IN ORDER TO MINE 500 TONS OF ORE GRADING 0.5% WO3. THUS, TOTAL TONNAGE (ORE + WASTE ROCK) WOULD AMOUNT TO ABOUT 7,000 TONS OF MATERIAL WITH AN OVERALL GRADE OF ONLY 0.2 OR 0.3% TUNGSTIC OXIDE. (1943 ASSESSMENT) THIS DATA DIFFERS SLIGHTLY FROM DATA PRESENTED IN TABLE ON P. 85 OF USGS BULL 946-C. 5 ; INFO.SRC : 1 PUB

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1987 Leonard, Kenneth R. (Page, Norman J.) U.S. Geological Survey

Beyond USGS

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

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