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Gran Bretana Mine

Producer in Ancash, Peru with commodities Zinc, Lead, Silver, Manganese, Cadmium, Iron
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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. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Production statistics
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10068762
MRDS ID W002008
Record type Site
Current site name Gran Bretana Mine
Alternate or previous names Azulcocha

Geographic coordinates

Geographic coordinates: -75.66638, -12.06453 (WGS84)
Elevation 4200
Relative position 30 KM NORTH OF YAURICOCHA

Site location context

Political divisions (FIPS codes)

Ancash(province)

Peru(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Peru Ancash

Comments on the location information

  • LOCATION FROM METALLOGENIC MAP OF PERU 1969 - NO. 44 - NEARBY ARE SAN PEDRO AND SAN PEBLO DEPOSITS; 90 KM SE OF LA OROYA; 470 KM N OF LIMA

Commodities

Commodity Importance
Zinc Critical Primary
Lead Primary
Silver Primary
Manganese Critical Secondary
Cadmium Secondary
Iron Tertiary

Comments on the commodity information

  • MANGANESE MINERALS, PYROLOSITE, PSILOMELANE ARE FOUND IN SECONDARY FRACTURES IN PACARA LIMESTONE IN LENSES

Materials information

Materials Type of material
Galena Ore
Orpiment Ore
Psilomelane Ore
Realgar Ore
Sphalerite Ore
Barite Gangue
Clay Gangue
Iron Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Pucara Limestone;Goyllarisquisga Formation, Arenaceous Sediments
    Rock description Pucara Limestone;Goyllarisquisga Formation, Arenaceous Sediments

Nearby scientific data

(1) -75.66638, -12.06453
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Anticlinal Structure.

Ore body information

  • General form IRREGULAR
    Strike E
    Dip 60S
    Length 500M
    Width 60M

Controls for ore emplacement

  • Reverse Fault

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1950
Year of first production 1953

Mining district

District name Junin

Ownership information

  • Type Operator
    Owner Toho Zinc Co. Ltd. And Banco Mineral Del Peru , Sociedad Minera Gran Bretana S. A.
    First year 1966
    Last year 1978
  • Type Operator
    Owner Sociedad Minera Gran Bretana S. A.
    First year 1978
  • Type Operator
    Owner Sociedad Minera Gran Bretana S. A.
    First year 1978

Production statistics

  • Year 1955
    Period 1953-55
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^ 1954: 42% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Manganese Manganese 42wt-pct
  • Year 1955
    Period 1953-55
    Material MN
    Accuracy Accurate
    Description Cp_Grade: ^1953: 42% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Manganese Manganese 42wt-pct
  • Year 1990
    Period 1980-1990
    Material ZN
    Accuracy Accurate
    Description Cp_Grade: ^ 1955: 43% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Manganese Manganese 43wt-pct

Comments on the production information

  • 134 TONS OF MANGANESE ORE WAS PRODUCED IN 1970. THE MINE IS BEING DEVELOPED TO PRODUCE 165,000 MET TONS OF ZN ORE ANNUALLY, CAPACITY, 25,000 TONS/YEAR OF ZN; ZN PRODUCTION PRE-1985 IS PRODUCTION FROM AZULCOCHA; 1986 PRODUCTION INCLUDES BOTH AZULCOCHA AND CONTONGA; POST-1986 PRODUCTION IS CONTONGA; AZULCOCHA CLOSED IN 1986 IN PART BECAUSE OF DECLINING RESERVES BUT ALSO BECAUSE OF TERRORISM. FEED GRADE IS 1990 WAS 2.49% PB, 5.58% ZN, 3.04 OZ/ST AG. CONCENTRATOR CAPACITY 1990 WAS 450 METRIC TONS/DAY.

Comments on the reserve resource information

  • ESTIMATED BY REPORTER 3/73 BASED ON 10 YEARS RESERVES TO SUSTAIN MAX. ANNUAL CAPACITY OF 25,000 TONS ZN METAL. ORE (1973) FROM BRISKEY, JOE FILES; ESTIMATES PRE-1985 ARE FOR AZULCOCHA; POST-1986 FOR CONTONGA. ORE (1990) INCLUDES 382,801 MT PROVED AND 156, 141 MT PROBABLE.
  • ESTIMATED BY REPORTER 3/73. BASED ON GEOLOGIC DATA. THE POTENTIAL RESOURCE ESTIMATES ARE PROBABLY CONSERVATIVE; ORE ESTIMATES PRE-1985 ARE FOR AZULCOCHA, POST 1986 ARE FOR CONTONGA.
  • ESTIMATED BY REPORTER TO HAVE POTENTIAL RESOURCES EQUIVALENT TO PRESENTLY ESTIMATED RESERVES 3/73. RESOURCE ESTIMATES CONSERVATIVE. ESTIMATES PRE-1985 ARE FOR AZULCOCHA; POST-1986 FOR CONTONGA.

Comments on the workings information

  • THE MINE IS BEING DEVELOPED

Comments on development

  • ECON.COM: ESSENTIALLY A MANGANESE PRODUCER IN THE PAST HAS BEEN DEVELOPED AS A ZINC MINE RECENTLY. SOLD MANGANESE OXIDES TO CERRO DE PASCO AND LATER TO JAPAN AND KOREA FOR ZINC PROCESSING. ZINC DEPOSIT DISCOVERED IN 1961 WHILE DIGGING DEEPER FOR MANGANESE. OPEN AS ZN MINE IN 1963.

Reference information

Bibliographic references

  • Deposit

    MINING MAGAZINE SEPT. 1969 VOL. 121 NO. 3 P. 257

  • Deposit

    PERU-MAPA METALOGENETICO, 1969, AND, GUIA PARA EL MAPA METALOGENETICO DEL PERU, SOCIEDAD NACIONAL DE MINERIA Y PETROLEO, LIMA, PERU, NOV. 1969

  • Deposit

    SIMONS, FRANK, 1960, UNPUBLISHED REPORT, P. 1547.

  • Deposit

    MINING MAGAZINE, JANUARY, 1987, P. 59.

  • Deposit

    CAVANAGH, J., AND GLOVER, M., 1991, THE PERU REPORT'S GUIDE TO MINES AND MINERS IN PERU: LIMA, PERU, PERU REPORTING SERVICES EDITORIALES S.R.L., P. 161-163.

  • Deposit

    1960 COMPILE FRANK SIMONS UNPUBLISHED REPOR

  • Production

    U.S.B.M. MINERALS YEARBOOK - 1970, PERU PREPRINT. CUMMULATIVE PRODUCTION FROM F. SIMONS, 1960, UNPUB. REP.; CAVANAGH AND GLOVER (1991)

General comments

Subject category Comment text
Deposit AZULCOCHA IS THE ZINC MINE DISCOVERED IN 1961, RECORD INCLUDES PRODUCTION FROM CONTONGA
Deposit THE MINE WAS THE ONLY SIGNIFICANT PRODUCER OF MANGANESE IN PERU

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1973 Goudarzi, Gus H. U.S. Geological Survey
Updater 01-JUL-1993 Page, Norman J. U.S. Geological Survey

Beyond USGS

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

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