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  3. Mineral Resource Data System (MRDS)

La Sirena

Past Producer in Baja California, Mexico with commodities Gold, Copper, Iron
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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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  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 10049289
MRDS ID MX00569
Record type Site
Current site name La Sirena

Geographic coordinates

Geographic coordinates: -112.88404, 28.2794 (WGS84)

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Mexico Baja California

Comments on the location information

  • ESTIMATED TO NEAREST 15 SECONDS.

Commodities

Commodity Importance
Gold Primary
Copper Secondary
Iron Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Hematite Ore
Limonite Ore
Magnetite Ore
Pyrite Ore
Specularite Ore
Calcite Gangue
Chlorite Gangue
Quartz Gangue
Sericite Gangue
Tourmaline Gangue
Zircon Gangue

Alteration

  • (Local) Phyllic

Analytical data

Result 0.5-88.0 G/MT AU, 0.5-3.0% CU.

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -112.88404, 28.2794
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Economic information

Geologic structures

Type of structure Local
Structure description Vertical Fault, N 15-25 W.

Ore body information

  • Strike N 15-25 W
    Dip A90
    Thickness 1M
    Length 270M
    Width 40M

Controls for ore emplacement

  • Fault Controlled

Comments on the geologic information

  • MAIN VEIN FOLLOWS VERTICAL FAULT ALONG WITH SUBPARALLEL QUARTZ-SERICITE ZONES AND PEGMATITE DIKES.

Economic information about the deposit and operations

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

Mining district

District name /El Barril

Reserves and resources

  • Type In-situ
    Estimate year 1980
    Total resources 25913000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 4 g/mt Gold Major 1980

Comments on the reserve resource information

  • 1-2> PROVEN ORE (LEVEL 40) 3> PROBABLE ORE. 4> POSSIBLE ORE. 5> ORE DUMPS.

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 40M

Comments on the workings information

  • THREE SHAFTS, 12-30 M DEEP, PLUS 30 M ADIT. A 20 M INCLINED SHAFT AND ABOUT 200 M OF WORKINGS ADDED BY CONSEJO DE RECURSOS MINERALES A1980.

Comments on development

  • ACTIVE: 1900-1904, 1940-1945.

Reference information

Bibliographic references

  • Deposit

    GONZALEZ G., J.A., Y AMAYA M., R., 1980, PROGRAMA DE EXPLORACION POR ORO EN EL PROYECTO EL BARRIL, MINA LA SIRENA, BAJA CALIFORNIA NORTE: SEMINARIO SOBRE EXPLORACION GEOLOGICO-MINERA 8, 1980, P. 137-162

General comments

Subject category Comment text
Deposit AU AND CU ASSOCIATED WITH MAGNETITE, SPECULARITE, HEMATITE, AND REMNANT PYRITE AND CHALCOPYRITE IN LIMONITE BOXWORK ALONG QUARTZ-TOURMALINE-ZIRCON VEINS AND ZONES OF QUARTZ-SERICITE ALTERATION. DIMENSIONS OF OREBODY, INCLUDING BOTH VEINS AND QUARTZ-SERICITE ZONE: 270 M CONTINUOUS OUTCROP LENGTH, 0.2-1.5 M WIDTH (AVE: 1.0 M), 40 M KNOWN DEPTH.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1988 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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