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Colquechaca Mine

Producer in La Paz, Bolivia with commodities Lead, Silver, Zinc, Antimony, Copper
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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. Economic information about the deposit and operations
  13. Ownership information
  14. Production statistics
  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 10100660
MRDS ID BL20293
Record type Site
Current site name Colquechaca Mine
Alternate or previous names La Solucion, Colquehuasi

Geographic coordinates

Geographic coordinates: -67.9995, -16.41437 (WGS84)
Elevation 4600
Relative position 15 KM S40W OF UNDUAVI

Site location context

Political divisions (FIPS codes)

La Paz(province)

Bolivia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Bolivia La Paz

Commodities

Commodity Importance
Lead Primary
Silver Primary
Zinc Critical Secondary
Antimony Critical Secondary
Copper Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrargyrite Ore
Sphalerite Ore
Stibnite Ore
Pyrite Gangue
Quartz Gangue
Siderite Gangue

Alteration

  • (Local) Hornfels Aureole Around Intrusives; Oxidized To 3 M Depth; Silicification

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Taquesi Batholith
    Rock description Taquesi Batholith
    Stratigraphic age (youngest) Late Devonian
    Stratigraphic age (youngest) Early Jurassic
    Stratigraphic age (youngest) Early Jurassic
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite

Nearby scientific data

(1) -67.9995, -16.41437
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description On W Limb Of N60w Anticline

Ore body information

  • General form TABULAR
    Strike N 40-45 E, N 60-65 E
    Dip 74-85 SE, ?
    Thickness 12M
    Length 2000M

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of last production 1991

Ownership information

  • Type Operator
    Owner Jose Rico Estensoro
  • Type Owner
    Owner Empresa Minera Colquechaca Limitada

Production statistics

  • Year 1974
    Period 1973-1974
    Material CONS PB
    Accuracy Estimate
    Description Cp_Grade: ^About 60% Pb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Conc. Lead Lead 60wt-pct

Comments on the production information

  • (1) EIGHT MONTHS PRODUCTION

Reserves and resources

  • Type In-situ
    Estimate year 1977
    Total resources 192442000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 3.7 wt-pct Lead Major 1977
    Silver Ag 153.28 g/mt Silver Major 1977
    Zinc Zn 8.04 wt-pct Zinc Minor 1977

Comments on the reserve resource information

  • POSITIVE RESERVE
  • PROSPECTIVE RESERVE

Workings at the site

  • Type of workings Underground
    Length 500M
    Overall depth 200M

Comments on the workings information

  • CROSSCUTS AND TUNNELS

Comments on development

  • ECON.COM: FLOATATION MILL

Reference information

Bibliographic references

  • Deposit

    IPORRE, F. AND SANDOVAL, R., 1977, COLQUECAHUA MINE PREFEASIBILITY STUDY: FONEM INTERNAL REPORT

  • Deposit

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

  • Other Database

    CIMRI

  • Production

    IPORRE AND SANDOVAL (1977)

General comments

Subject category Comment text
Deposit TWO VEIN SYSTEMS: COLQUECAHUA - SAN RAFAEL WHICH IS THE MAIN VEIN, 2 KM LONG, DIP 74-85 S, 4 TO 12 M THICK, AND MACHUCA VEIN WHICH IS A BRANCH OF THE MAIN STRUCTURE, 200 M LONG, N 60-65 E STRIKE, 20-30 CM THICK. VERTICALLY ZONED WITH SB IN THE UPPER PART, PB IN THE MIDDLE, AND ZN IN THE LOWER PART OF THE VEINS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1991 Cardenas, Nestor 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.

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