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Kori Kollu Mine

Producer in Oruro, Bolivia with commodities Gold, Silver, Copper, Lead, Zinc, Antimony, 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. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Reserves and resources
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10056482
MRDS ID TC00500
Record type Site
Current site name Kori Kollu Mine
Alternate or previous names Cerro Chuquina, Khori Kkollu, Inti Raymi

Geographic coordinates

Geographic coordinates: -67.44949, -17.80043 (WGS84)
Elevation 3820
Relative position 6 KM SE OF LA JOYA

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

Comments on the location information

  • MINE LOCATED ON TOP OF CERRO CHUQUINA; PREVIOUS QUAD DESIGNATION = COCHABAMBA(SE 19-8) 1:250000

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Tertiary
Lead Tertiary
Zinc Critical Tertiary
Antimony Critical Tertiary
Arsenic Critical Tertiary

Materials information

Materials Type of material
Chalcocite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Orpiment Ore
Realgar Ore
Silver Ore
Sphalerite Ore
Stibnite Ore
Tetrahedrite Ore
Jarosite Gangue
Pyrite Gangue

Alteration

  • (Local) Intense Sericitization

Analytical data

Result ROCK AND MINERAL AND FLUID INCLUSION ANALYSES (ALARCON AND VILLALPANDO, 1988)

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) > Felsic Volcanic Rock > Dacite
    Stratigraphic age (youngest) Middle Miocene
    Chronological age 15
    Dating method K-Ar

Nearby scientific data

(1) -67.44949, -17.80043
ListMap

Economic information

Ore body information

  • General form TABULAR
    Thickness 50M
    Depth to top 0M
    Depth to bottom 50M

Controls for ore emplacement

  • Intense Ne Trending Fractures

Comments on the geologic information

  • SILICIFIED OXIDE ORE ZONE UNDERLAIN BY SULFIDE BEARING, ADVANCED ARGILLIC ALTERED INTERMEDIATE INTRUSIVE.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1979
Year of first production 1983
Production years 1983-

Mining district

District name La Joya District

Land status

Ownership category Federal

Ownership information

  • Type Joint Venture Owner
    Owner Empresa Minera Inti Raymi S. A
  • Type Joint Venture Partner
    Owner Battle Mountain Gold Co.
    Interest 51
  • Type Joint Venture Partner
    Owner Westworld Resources
    Interest 24.5
  • Type Joint Venture Partner
    Owner Zeland Mines S. A.
    Interest 24.5

Reserves and resources

  • Type In-situ
    Estimate year 1983
    Total resources 10000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.2 g/mt Gold Major 1983
    Silver Ag 15 g/mt Silver Major 1983
  • Type In-situ
    Estimate year 1990
    Total resources 27000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.891 g/mt Gold Major 1990
    Silver Ag 12.423 g/mt Silver Major 1990

Comments on the reserve resource information

  • ITEM 1 IS OXIDIZED ORE ONLY. ITEM 2 HAS 55.1 MILLION ST SULFIDE ORE, 5.7 MILLION ST OXIDE ORE.

Workings at the site

  • Type of workings Surface
    Overall depth 0M

Comments on development

  • TOTAL$: 4000 ; MILL.CAP: 2500 ; ECON.YEAR: 1989 ; ECON.COM: $2.9 MILLION GUARANTEED LOAN FROM U.S. OVERSEAS PRIVATE INVESTMENT CORP. IN 1986

Reference information

Bibliographic references

  • Deposit

    REDWOOD, S.D., 1987, THE SOLEDAD CALDERA, BOLIVIA: A MIOCENE CALDERA WITH ASSOCIATED EPITHERMAL AU-AG-CU-PB-ZN MINERALIZATION: GEOLOGICAL SOCIETY OF AMERICA BULLETIN, V. 99, P. 395-404.

  • Deposit

    ALARCON B., H., AND VILLALPANDO B., A., 1988, ALTERACIONES HIDROTERMALES Y TERMOMETRIA DEL YACIMIENTO "LA JOYA" - ORURO, BOLIVIA, IN EXTENDED ABSTRACTS, YACIMIENTOS EPITERMALES EN AMBIENTES DE VOLCANISMO RECIENTO, SEMINARIO-TALLER, BOLIVIA, SEPT. 4-16, 1988, 2 P.

  • Deposit

    ANZOLEAGA, V., 1988, THE JOYA COPPER-GOLD-SILVER DISTRICT, BOLIVIA, IN EXTENDED ABSTRACTS, YACIMIENTOS EPITERMALES EN AMBIENTES DE VOLCANISMO RECIENTE, SEMINARIO-TALLAR, BOLIVIA, SEPT. 4-16, 1988, 2 P.

  • Deposit

    MINING MAGAZINE, JANUARY, 1989, P. 45.

  • Deposit

    SITE VISIT, MAY, 1990 BY USGS GEOLOGISTS.

  • Deposit

    VISITED BY USGS/GEOBOL PERSONNEL 199

  • Other Database

    CIMRI

  • Production

    STATE DEPT MINERALS REPORT BOLIVIA 1988, P. 41-42

  • Reserve-Resource

    REDWOOD (1987)

General comments

Subject category Comment text
Deposit DEPOSIT HAS AN OXIDIZED SILICA CAP, 35-50 M THICK WHERE JAROSITE AND MINOR GOETHITE REPLACE DISSEMINATED AND VEINLET PYRITE. STOCKWORK SULFIDE MINERALIZATION IS FOUND BELOW A WEAK CHALCOCITE ENRICHMENT BLANKET THAT FLOORS OXIDE ZONE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1989 Long, Keith U.S. Geological Survey
Updater 01-DEC-1990 Long, Keith; Ludington, Steve (Usgs) U.S. Geological Survey

Beyond USGS

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

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