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Maria Francisca Mine

Past Producer in Oruro, Bolivia with commodities Lead, Zinc, Silver, Tin, Antimony
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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. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Reserves and resources
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10006424
MRDS ID BL20455
Record type Site
Current site name Maria Francisca Mine

Geographic coordinates

Geographic coordinates: -66.8328, -18.24764 (WGS84)
Elevation 3900
Relative position SOUTH OF HUANUNI MILL

Site location context

Political divisions (FIPS codes)

Oruro(province)

Bolivia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Bolivia Oruro
Bolivia Oruro

Comments on the location information

  • LAT LONG FOR HUANUNI DISTRICT

Commodities

Commodity Importance
Lead Primary
Zinc Critical Primary
Silver Primary
Tin Critical Secondary
Antimony Critical Secondary

Materials information

Materials Type of material
Boulangerite Ore
Galena Ore
Jamesonite Ore
Sphalerite Ore
Tetrahedrite Ore
Pyrite Gangue
Quartz Gangue
Tourmaline Gangue

Alteration

  • (Local) Silicification

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 Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Stratigraphic age (youngest) Early Silurian
    Stratigraphic age (youngest) Early Silurian
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Llallagua
    Rock description Llallagua

Nearby scientific data

(1) -66.8328, -18.24764
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description On W Flank Of Haununi Anticline

Ore body information

  • General form PINCH AND SWELL

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1850
Year of last production 1951

Mining district

District name Huanuni

Ownership information

  • Type Operator
    Owner Empresa Minera Huanuni, Empresa Minera Subsidiaria Oruro (Comibol Subsidiary)
  • Type Owner
    Owner Corporacion Minera De Bolivia (Comibol)

Reserves and resources

  • Type In-situ
    Estimate year 1990
    Total resources 4188000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 1.76 wt-pct Lead Major 1990
    Zinc Zn 5.68 wt-pct Zinc Major 1990
    Silver Ag 437 g/mt Silver Major 1990
  • Type In-situ
    Estimate year 1990
    Total resources 2687000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 1.41 wt-pct Lead Major 1990
    Zinc Zn 4.54 wt-pct Zinc Major 1990
    Silver Ag 350 g/mt Silver Major 1990
  • Type In-situ
    Estimate year 1990
    Total resources 3186000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 1.37 wt-pct Lead Major 1990
    Zinc Zn 6.72 wt-pct Zinc Major 1990
    Silver Ag 305 g/mt Silver Major 1990
  • Type In-situ
    Estimate year 1990
    Total resources 16389000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 2.16 wt-pct Lead Major 1990
    Zinc Zn 8.67 wt-pct Zinc Major 1990
    Silver Ag 580 g/mt Silver Major 1990

Comments on the reserve resource information

  • (1) POSITIVE; (2) PROBABLE; (3) POSSIBLE; (4) PROSPECTIVE

Workings at the site

  • Type of workings Underground
    Overall depth 100M

Comments on the workings information

  • INCLINE SHAFTS, ADITS, SEVERAL LEVELS, NOW FLOODED.

Comments on development

  • UP TO 1951 HAD PRODUCED HAND SORTED ORE CONTAINING 30% ZN, 8% PB, 0.5% AG, PLUS SN.

Reference information

Bibliographic references

  • Deposit

    AHLFELD, F., AND SCHNEIDER-SCHERBINA, A., 1964, LOS YACIMIENTOS MINERALES Y DE HIDROCARBUROS DE BOLIVIA: DEPARTAMENTO NACIONAL DE GEOLOGIA (BOLIVIA) BOLETIN 5 (ESPECIAL), P. 170-171.

  • Deposit

    COMIBOL, 1990, PROYECTOS DE INVERSION MINERA: BOLETIN DE LA DIRECCION DE RELACIONES PUBLICAS E INFORMACION DE LA CORPERACION MINERA DE BOLIVIA.

  • Deposit

    GUSTAVSON ASSOC., 1992, COMPENDIUM OF THE ECONOMIC GEOLOGY OF BOLIVIA

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit MINE LOCATED ON THE SW EDGE OF THE HUANUNI DISTRICT. TWO MAIN VEINS: ONE WITH COMPLEX MINERALOGY (N70E), THE OTHER WITH ONLY STANNITE (N70W) FOUND ON THE 87 M LEVEL DEEP IN THE MINE. THE COMPLEX VEIN AVERAGES 0.4 M WIDE WITH AVERAGE GRADES OF 152 G/MT AG, 2.49% PB, 13.39% ZN, AND 2.75% SN. THE STANNITE VEIN AVERAGES 0.4 M WIDE WITH AN AVERAGE GRADE OF 3.42% SN. AN ORE SHOOT IN THE COMPLEX VEIN 20 M LONG AND 0.7 M WIDE WAS MINED TO 100 M DEPTH.
Deposit Discovery Year: 1800'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1993 Long, Keith R. U.S. Geological Survey

Beyond USGS

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

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