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  3. Mineral Resource Data System (MRDS)

Los Cinco Hermanos North

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. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10095820
MRDS ID MX00460
Record type Site
Current site name Los Cinco Hermanos North
Related records 10135400

Geographic coordinates

Geographic coordinates: -115.90665, 32.23758 (WGS84)
Relative position SHAFT IN NORTHERNMOST TACTITE BODY ON LOS CINCO HERMANOS CLAIM.

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

Analytical data

Result ORE PROBABLY AVERAGED LESS THAN 0.2% 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 > Hornfels
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble
  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -115.90665, 32.23758
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Roof Pendant

Ore body information

  • Strike NNE
    Dip 70 W

Comments on the geologic information

  • FOUR SEPARATE BEDS (LISTED UNDER SEPARATE MRDS-REV RECORDS) IN ELONGATE PENDANT OF HORNFELS AND SCHIST IN QUARTZ DIORITE. NORTHERNMOST BED IS LARGEST, 250 M LONG WITH MAX. WIDTH OF 40 M. MARBLE, AS WELL AS ADJACENT HORNFELS AND SCHIST, ARE INTRUDED BY SMALL IRREGULAR MASSES OF QUARTZ DIORITE.

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

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 7M

Comments on the workings information

  • FOUR SHALLOW PITS AND AN INCLINE SHAFT 6-7 M DEEP.

Comments on development

  • A FEW TONS OF ORE WERE SORTED OUT DURING EXPLORATORY WORK. TOO LEAN TO SHIP TO MILL.

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. 99, PLATE 26

General comments

Subject category Comment text
Deposit NORTHERNMOST OF FOUR SEPARATE BEDS OF MARBLE-TACTITE ON LOS CINCO HERMANOS CLAIM. TACTITE OCCURS ALONG EAST SIDE OF MARBLE BED TRENDING NNE WITH 70 W DIP. ONLY TRACES OF SCHEELITE FOUND IN SURFACE WORKINGS, BUT SHAFT EXPOSED A SCHEELITE-BEARING ZONE RANGING FROM A FEW TENTHS OF A METER TO ABOUT 1.5 M IN WIDTH.

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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