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Maria Luisa Mine

Producer in Oruro, Bolivia with commodities Silver, Lead, Zinc, Gold, Copper, Cadmium
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Production statistics
  18. Reserves and resources
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10107579
MRDS ID BL10051
Record type Site
Current site name Maria Luisa Mine
Alternate or previous names Vein: Santo Domingo

Geographic coordinates

Geographic coordinates: -67.71366, -19.70593 (WGS84)
Elevation 3825
Relative position 9.5 KM S25W OF SALINAS DE GARCI MENDOZA

Site location context

Political divisions (FIPS codes)

Oruro(province)

Bolivia(country)

South America(continent)

Land(continent)

Federal lands

Federal(land status)

Geographic areas

Country State
Bolivia Oruro

Commodities

Commodity Importance
Silver Primary
Lead Secondary
Zinc Critical Secondary
Gold Tertiary
Copper Tertiary
Cadmium Tertiary

Materials information

Materials Type of material
Argentite Ore
Cerargyrite Ore
Cerussite Ore
Chalcopyrite Ore
Covellite Ore
Freibergite Ore
Galena Ore
Sphalerite Ore
Stephanite Ore
Chlorite Gangue
Hematite Gangue
Jarosite Gangue
Kaolinite Gangue
Limonite Gangue
Pyrite Gangue
Quartz Gangue
Sericite Gangue
Specularite Gangue

Alteration

  • (Local) Silicification And Argillization Extending Up To 30 M From Veins. Weak Silicification Of Country Rock. Chalcedony-Pyrite Alteration Found In One Drill Hole.

Analytical data

Result ORE ANALYSES BY ENTWISTLE (1948). AHLFELD AND SCHNEIDER-SCHERBINA (1964) REPORT CD ASSAYS OF 0.14 AND 0.02%. SCHULTZE (1968) REPORTS THAT CONCENTRATES SENT TO ASARCO SMELTER IN EL PASO IN 1948 HAD GRADES OF 0.5 G/T AG AND 350 G/T AG. USGS (1990): UP TO 2000 G/MT AG, 0.85 G/MT AU, 20% PB, 10% ZN, 3% CU

Mineral occurrence model information

Model code 77
USGS model code 20b
Deposit model name Sn-polymetallic vein

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)

Nearby scientific data

(1) -67.71366, -19.70593
ListMap

Economic information

Ore body information

  • General form IRREGULAR
    Strike N 40 W TO EW
    Dip 60NE TO VERTICAL
    Depth to top 0M

Controls for ore emplacement

  • Nw Fractures

Comments on the geologic information

  • HOST ROCKS ARE A THICK SECTION OF PORPHYRITIC LAVAS, LAPILLI AND CRYSTAL-RICH TUFFS, AND ASSOCIATED BRECCIAS OF PROBABLE MIOCENE AGE. WALL ROCKS CONTAIN UP TO 1% DISSEMINATED PYRITE PLUS A LESSER AMOUNT OF DARK SULFIDES.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discoverer Spanish Colonists

Mining district

District name Salinas De Garci Mendoza

Land status

Ownership category Federal

Ownership information

  • Type Operator
    Owner Empresa Minera Maria Luisa (Comibol)
  • Type Owner
    Owner Corporacion Minera De Bolivia (Comibol)

Production statistics

  • Year 1967
    Material MARIA LUISA
    Accuracy Accurate
    Description Ap_Grade: ^66.8% Pb 3.1% Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Silver Silver 3wt-pct
    Lead Lead 67wt-pct

Reserves and resources

  • Type In-situ
    Estimate year 1948
    Total resources 436200000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 263 g/mt Silver Major 1948
    Lead Pb 4.5 wt-pct Lead Minor 1948
    Zinc Zn 5.52 wt-pct Zinc Minor 1948
  • Type In-situ
    Estimate year 1982
    Total resources 304500000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 287 g/mt Silver Major 1982
    Lead Pb 4 wt-pct Lead Minor 1982
    Zinc Zn 4.44 wt-pct Zinc Minor 1982

Comments on the reserve resource information

  • INCLUDES ORE IN MARGARITA AND SAN MIGUEL MINES EXCEPT FOR ITEMS 3 AND 4 WHICH IS MARIA LUISA EXCLUSIVELY.

Workings at the site

  • Type of workings Underground
    Length 120M

Comments on the workings information

  • ONE ADIT. MANY OLD COLONIAL WORKINGS.

Comments on development

  • EXPLORATION BY A CHILEAN CONCERN 1925. MAJOR EXPLORATION PROGRAM BY ASARCO 1947-1949. NATIONALIZED 1952.

Reference information

Bibliographic references

  • Deposit

    ENTWISTLE, L.P., 1948, MARIA LUISA UNIT, GEOLOGY AND EXPLORATION: CIA. ASARCO BOLIVIA LTDA. INTERNAL REPORT, 6P.

  • Deposit

    GAMBOA, C., 1982, RESERVAS ACTUALIZADAS DE LA MINA MARIA LUISA: COMIBOL, INTERNAL REPORT, 4P.

  • Deposit

    PAZ, F., 1971, VERIFICACION DE RESERVAS Y POSIBILIDADES DE LA MINA MARIA LUISA: COMIBOL, INTERNAL REPORT, 11P.

  • Deposit

    SCHULTZE, H., 1968, ESTUDIO DE FACTIBILIDADES, MINA MARIA LUISA: COMIBOL, INTERNAL REPORT, 11P.

  • Deposit

    MEDINA C., A., JIMENEZ CH., N., AND IBANEZ V., V., 1988, CARACTERISTICAS GEOLOGICAS Y EVALUACION DEL POTENCIAL MINERAL DEL YACIMIENTO DE METALES PRECIOSOS MARIA LUISA, ORURO-BOLIVIA: PROGRAMA DE LAS NACIONES UNIDAS PARA EL DESAROLLO, PROYECTO BOL/87/012, INFORME NU-17, 32P.

  • Deposit

    AHLFELD, F., AND SCHNEIDER-SCHERBINA, A., 1964, LOS YACIMIENTOS MINERALES Y DE HIDROCARBUROS DE BOLIVIA: DEPARTAMENTO NACIONAL DE GEOLOGIA BOLETIN 5, 388P.

  • Deposit

    SANJINES V., ORLANDO, 1968, ESTUDIO GEOLOGICO DE LA REGION DE TAGUA: UNPUBLISHED TESIS DE GRADO, UNIVERSIDAD MAYOR DE SAN ANDRES, FACULTAD DE CIENCIAS GEOLOGICAS, 102P., MAP 1:50,000

  • Deposit

    COMIBOL, INFORME SOBRE GRUPO MINERO MARIA LUISA, DE LA CORPORACION MINERA DE BOLIVIA, PROVINCIA LADISLAO CABRERA, DEPARTAMENTO DE ORURO, 4P.

  • Deposit

    DETAILLED EXPLORATION BY ASARCO 1917-1949 (ENTWISTLE, 1948)

  • Deposit

    SPORADIC EXPLORATION BY COMIBOL AFTER 1952 (SCHULTZE, 1968; PAZ, 1971, GAMBOA, 1982)

  • Deposit

    THESIS BY SANJINES (1968)

  • Deposit

    GEOLOGICAL STUDY BY UNDP 1988 (MEDINA ET. AL., 1988)

  • Deposit

    EXAMINED BY USGS/GEOBOL PERSONNEL 1990

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit VEINS STRIKE N 70 TO 80 W, DIP VERTICAL TO 70N AND ARE 0.1 TO 2 M WIDE. ARE OTHER VEIN SYSTEMS (CRUCERO, TANCANE, SANTA RITA, JOHNNY WALKER, ETC.) THAT ARE UNEXPLORED. SANTO DOMINGO VEIN IS 3000 M LONG AND UP TO 6 M WIDE BUT GENERALLY AROUND 2 M WIDE. THE PIE DE GALLO ORE SHOOT WAS 200 M LONG, AND 2 TO 5 M WIDE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1990 Long, Keith R. U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD
Editor 27-APR-1995 Mosier, Dan U.S. Geological Survey

Beyond USGS

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

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