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Dos Amigos Mine

Past Producer in La Paz, Bolivia with commodities Silver, Lead, Zinc, Arsenic
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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. Mining district
  14. Land status
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10005973
MRDS ID BL10194
Record type Site
Current site name Dos Amigos Mine
Alternate or previous names Pacocagua

Geographic coordinates

Geographic coordinates: -69.24176, -17.316 (WGS84)
Elevation 4200
Relative position 4.5 KM S40W OF BERENGUELA

Site location context

Political divisions (FIPS codes)

La Paz(province)

Bolivia(country)

South America(continent)

Land(continent)

Federal lands

Federal(land status)

Geographic areas

Country State
Bolivia La Paz

Commodities

Commodity Importance
Silver Primary
Lead Secondary
Zinc Critical Tertiary
Arsenic Critical Tertiary

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore
Barite Gangue
Pyrite Gangue
Quartz 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 Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Cerke
    Rock description Cerke
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Cerke
    Rock description Cerke

Nearby scientific data

(1) -69.24176, -17.316
ListMap

Economic information

Ore body information

  • Length 350M
    Depth to top 0M

Comments on the geologic information

  • MINE DISCHARGES SIO2 RICH FLUIDS AND CO2 SUGGESTING RECENT OR ONGOING HYDROTHERMAL ACTIVITY. SOME 1000 CU M OF OPALINE SINTER FOUND NEARBY, SOME 12 M THICK.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1650
Discoverer Spanish Colonists
Year of last production 1780

Mining district

District name Berenguela

Land status

Ownership category Federal

Workings at the site

  • Type of workings Underground
    Overall depth 15M

Comments on the workings information

  • LARGE DUMPS; 3 ADITS, 1 SHAFT, ALL FLOODED. MINE HAS A CO2 GAS PROBLEM.

Reference information

Bibliographic references

  • Deposit

    SCHNEIDER-SCHERBINA, A., 1962, LOS YACIMIENTOS POLIMETALICOS DE BERENGUELA: GERMAN GEOLOGICAL MISSION TO BOLIVIA REPORT 39, 54P

  • Deposit

    FIELD INVESTIGATIONS, 1990, USGS/GEOBOL

  • Deposit

    INVESTIGATIONS BY GERMAN GEOLOGICAL MISSION (SCHNEIDER-SCHERBINA, 1962)

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit VEIN IS 300 M LONG
Deposit Discovery Year: 1600'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1990 Long, K.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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