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  3. Mineral Resource Data System (MRDS)

Negra Mine

Occurrence in Potosi, Bolivia with commodities Silver, Manganese
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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. Economic information about the deposit and operations
  13. Ownership information
  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 10005914
MRDS ID BL10104
Record type Site
Current site name Negra Mine
Alternate or previous names Avaroa, La Negra

Geographic coordinates

Geographic coordinates: -68.297, -21.0384 (WGS84)
Elevation 3820
Relative position 6.5 KM S50E OF PAJANCHA, 620 KM FROM LA PAZ BY ROAD

Site location context

Political divisions (FIPS codes)

Potosi(province)

Bolivia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Bolivia Potosi
Bolivia Potosi

Comments on the location information

  • ON NE FLANK OF CHIPAPA LOMA

Commodities

Commodity Importance
Silver Primary
Manganese Critical Primary

Materials information

Materials Type of material
Alunite Gangue
Chalcedony Gangue

Alteration

  • (Local) Silicification, Oxidation, Argillization, Kaolinization

Analytical data

Result ORE ANALYSES BY SANJINES (1968): 28.55% MN 20 G/T AG

Mineral occurrence model information

Model code 156
USGS model code 25g
Deposit model name Epithermal Mn

Host and associated rocks

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

Nearby scientific data

(1) -68.297, -21.0384
ListMap

Economic information

Ore body information

  • Strike N 55 W
    Dip 68?
    Depth to top 0M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No
Discoverer Spanish Colonists

Ownership information

  • Type Owner-Operator
    Owner Cooperativa Minera Industrial El Porvenir

Workings at the site

  • Type of workings Underground
    Length 15M

Comments on the workings information

  • TWO ADITS, 5 AND 10 M LONG RESPECTIVELY

Reference information

Bibliographic references

  • Deposit

    SANJINES, R., 1968, INFORME DE ASISTENCIA TECNICA MINERA A LA PROPIEDAD DE LA COOPERATIVE MINERA INDUSTRIAL EL PORVENIR LIMITADA: SERVICIO GEOLOGICO DE BOLIVIA, UNPUBLISHED REPORT, 14P., MAPS 1:1,000, 1:500, 1:200

  • Deposit

    ESPINOZA, A., 1990, MINTEC INTERNAL REPORT

  • Deposit

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

  • Deposit

    GEOLOGICAL INVESTIGATIONS BY SANJINES (1968

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit SEVERAL BRECCIATED VEINS ARE 2 TO 90 CM WIDE WITH SMALL VEINLETS, CLOTS, AND COATINGS OF MN OXIDES AND SELVAGES OF ARGILLIC ALTERATION

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1990 Long, Keith R. U.S. Geological Survey
Updater 01-MAR-1991 Guerra, Edwin Servicio Geologic de Bolivia
Updater 01-NOV-1993 Long, Keith 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