1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

La Esperanza

Past Producer in Baja California, Mexico with commodity Tungsten
Map
XML
JSON
KML
C
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. Economic information about the deposit and operations
  11. Mining district
  12. Production statistics
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10049028
MRDS ID MX00237
Record type Site
Current site name La Esperanza
Related records 10254996

Geographic coordinates

Geographic coordinates: -115.98415, 32.15009 (WGS84)

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 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 > Skarn (Tactite)

Nearby scientific data

(1) -115.98415, 32.15009
ListMap

Economic information

Comments on the geologic information

  • N END OF ROOF PENDANT THAT CONTAINS EL TOPO DEPOSIT. AT THIS POINT, THE PENDANT IS ABOUT 2 M WIDE AND CONSISTS MAINLY OF TACTITE AND SOME HORNFELS.

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

Production statistics

  • Year 1943
    Material ORE W
    Accuracy Estimate
    Description Ap_Grade: ^Ave. 0.8% Wo3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Ore Tungsten Tungsten 1wt-pct

Comments on the production information

  • ORE WAS CAREFULLY PICKED UNDER UV LIGHT, MORE THAN HALF OF THE ROCK WAS DISCARDED. OVERALL TENOR OF THE DEPOSIT AVERAGED LESS THAN 0.4% WO3. OPERATION WAS NOT PROFITABLE.

Comments on the reserve resource information

  • NO ORE APPROACHING COMMERCIAL GRADE EXPOSED IN THE WORKINGS. NOT LIKELY THAT ANY MORE WILL BE FOUND.

Workings at the site

  • Type of workings Underground
    Overall depth 6M

Comments on the workings information

  • TWO SHAFTS 6 M DEEP AND 15 M APART.

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 OCCURS IN A ZONE 0.5 - 1.0 M WIDE IN GARNET-DIOPSIDE TACTITE. SOME POCKETS OF MODERATELY RICH ORE MINED FROM UPPER PARTS OF SHAFTS. ORE ZONE LESS THAN 0.5 M WIDE AND LOW GRADE AT BOTTOM OF SHAFTS. PROBABLY CUT OFF BY DIORITE A FEW M BELOW.

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