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Cobriza

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

Geologic information

Identification information

Deposit ID 10068758
MRDS ID W002003
Record type Site
Current site name Cobriza
Related records 10255260

Geographic coordinates

Geographic coordinates: -74.49968, -12.46452 (WGS84)
Elevation 2100
Relative position 110 KM SW OF HUANCAYO; 570 KM SE OF LIMA, 166 KM NNE OF AYACUCHO.

Site location context

Political divisions (FIPS codes)

Huancavelica(province)

Peru(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Peru Huancavelica

Comments on the location information

  • CENTER OF DISTRICT LOCATED FROM METALLOGENIC MAPS OF PERU - 1969 - NO. 18 - JULCANI
  • LOCATION FROM METALLOGENIC MAP OF PERU 1969, NO. 51

Commodities

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

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Covellite Ore
Pyrrhotite Ore
Sphalerite Ore
Stannite Ore
Actinolite Gangue
Barite Gangue
Calcite Gangue
Diopside Gangue
Epidote Gangue
Garnet Gangue
Magnetite Gangue
Quartz Gangue
Scapolite Gangue
Siderite Gangue

Mineral occurrence model information

Model code 59
USGS model code 18b
Deposit model name Skarn Cu
Mark3 model number 8

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Cobriza Batholith
    Rock description Cobriza Batholith
    Stratigraphic age (youngest) Holocene
    Stratigraphic age (youngest) Holocene
  • Host or associated Host
    Rock type Unconsolidated Deposit > Alluvium
    Rock unit name Copacabana Formation;Mitu Group;
    Rock description Copacabana Formation;Mitu Group;

Nearby scientific data

(1) -74.49968, -12.46452
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Coris Anticline N. 45 W. And Fracture Systems Nw-Se; N-S And E-W.
Type of structure Local
Structure description Cobriza Fault Displacing The Mineralized Zone 350 M And Several Other Faults Of Variable Strikes And Dips.

Ore body information

  • General form TABULAR
    Length 2000M
    Depth to bottom 800M

Controls for ore emplacement

  • Stratigraphic (Limestone Unit In Shale And Sandy Shale)

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1866
Discoverer Antonio Raimondi, Known Since Colonial Times
Year of first production 1967

Mining district

District name Cobriza, San Pedro De Coris

Ownership information

  • Type Operator
    Owner Cerro De Pasco Corp. ; Centromin ).
    First year 1966
    Last year 1974
  • Type Owner
    Owner Cerro De Pasco Corp. 1978); Centromin 1966).
    First year 1966

Production statistics

  • Year 1972
    Period 1968-1972
    Material ORE
    Accuracy Estimate
    Description Cp_Grade: ^2.2% Cu, Plus Zn-Pb-Ag Values In Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Copper Copper 2wt-pct
  • Year 1976
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^2.2 % Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Copper Copper 2wt-pct
  • Year 1977
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^2.2 % Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Copper Copper 2wt-pct

Comments on the production information

  • IN 1957 THE ORE IN JULCANI RANGED FROM 600 TO 1200 G/TON AG. SOME W03 HAS BEEN PRODUCED NOT SURE WHAT SIMONS DATA REFERS TO ORE(1953) REFERS TO DATA FROM CAVANAGH AND GLOVER (1991) AND REFLECTS BUENAVENTURA'S DATA. HERMINA AND SACRAMENTO MINES ARE PB RICH, LUCRECIA AND CARMENCITA ARE CU RICH. PB-AG CONCENTRATE CONTAINS 0.15-3.0 OZ/ST AU, 3-7% CU, 4.5-7.5% ZN, 4.0-6.0% SB, 1.5-3.0% AS, 0.2-0.8% BI.
  • 1&2) LA MINERA EN EL PERU, ANUARIO MINERO COMERCIAL 1977; HAND SORTED ORE IN 1960'S AVERAGED 6.73% CU, 0.4% ZN, 2.5 OZ/T AG, 0.1% PB.

Reserves and resources

  • Type In-situ
    Estimate year 1977
    Total resources 42760000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 1.2 wt-pct Copper Major 1977
    Silver Ag 21.6 g/mt Silver Major 1977
  • Type In-situ
    Estimate year 1967
    Total resources 71000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 2.53 wt-pct Copper Major 1967
  • Type In-situ
    Estimate year 1990
    Total resources 30824300000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 1.35 wt-pct Copper Major 1990
    Silver Ag 18.973 g/mt Silver Major 1990
  • Type In-situ
    Estimate year 1991
    Total resources 30824300000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 1.35 wt-pct Copper Major 1991
    Silver Ag 18.973 g/mt Silver Major 1991

Comments on the reserve resource information

  • DEPOSIT SIZE BASED ON 1957-1972 PRODUCTION PLUS 1973 RESERVES.
  • PV = PROVEN, PB = PROBABLE
  • REPORTED BY PETERSEN AND OTHERS(1977)
  • ESTIMATE BASED ON EXPANSION CAPACITY OF ANNUAL PRODUCTION TO 3,650,000 TONS
  • ESTIMATED BY REPORTER 9/2/72
  • ESTIMATED BY REPORTER AT 30 YEARS LIFE OF THE MINE AT AN ANNUAL PRODUCTION RATE OF 500,000 TONS OF ORE. THIS ESTIMATE IS BASED ON INVESTMENT OF 18 MILLION DOLLARS FOR RECENT DEVELOPMENT; 2) 4321709 MT PROVED, 2148534 MT PROBABLE RESERVES 3) DEADLINE 1/1/67.

Comments on the workings information

  • HAULAGE IS BY RAIL. ADIT-CUT AND FILL.

Comments on development

  • CONCENTRATOR FEED CAPACITY:550TPD,DOES CUSTOM MILLING,EXTRACTION METHOD: FLOTATION.PLANT FEED CAPACITY:TAILINGS TPD, PRODUCT-TUNGSTEN, EXTRACTION METHOD:GRAVITY; FIRST DISCUSSED BY MARCOS JIMENEZ DE LA ESPADA IN 1586. ; ECON.COM: EMPLOYMENT (1972)-839; CONCENTRATOR CAPACITY (1991) 400 MT/DAY WITH FEED GRADE OF 0.54% CU, 0.66% PB, 14.1 OZ/ST AG
  • SEE BIBLIOGRAPHY - CAHOON B. G. 1970; CONCENTRATION CAPACITY (1990), 9100 MT PER DAY WITH FEED GRADE OF 1.30% CU, 13.56 G/MT AG; CU RECOVERY 94.12%. ; ECON.COM: FEED GRADE (1990) 1.30% CU, 13.56 G/MT AG ; MILL.CAP : 9100 MET TPD (1990)

Reference information

Bibliographic references

  • Deposit

    PETERSON U. 1965, REGIONAL GEOLOGY AND MAJOR ORE DEPOSITS OF CENTRAL PERU ECON. GEOL. VOL. 60 NO. 3 P. 407-476

  • Deposit

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

  • Deposit

    BELLIDO BRAVO, E. AND DE MONTREUIL., L., 1972, ASPECTOS GENERALES DE LA METALOGENIA DEL PERU, P. 123, ED. MINISTER10 DE ENERGIA Y MINAS, SERVICIO DE GEOLOGIA Y MINERIA.

  • 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 SERVICIOS EDITORIALES S.R.L., P. 135-136.

  • Deposit

    CAHOON, B.G., 1970, GEOLOGIA DE LA MINA COBRIZA IN GEOLOGIA DE LOS YACIMIENTOS OPERADOS PAR LA CERRO DE PASCO, P. 41-61 IN 1ST CONGRESSO LATINO AMERICANO DE GEOLOGIA, NOVEMBER 22-29, 1970, LIMA, PERU.

  • Deposit

    1926 GEOLMAP CERRO DE PASCO

  • Deposit

    1956 GEOLMAP CERRO DE PASCO

  • Deposit

    1966 CERRO DE PASCO

  • Production

    MINING ENGINEERING NOV. 1969 VOL. 21 NO. 11 P. 62; CAVANAGH AND GLOVER (1991)

  • Reserve-Resource

    INTERNATIONAL DIRECTORY ON MINING AND MINERAL PROCESSING OPERATIONS, 1977

General comments

Subject category Comment text
Deposit First Production Year: 1937 SIGNIFICANT
Deposit THE DEPOSITS OF THE JULCANI DISTRICT ARE VEINS USUALLY LESS THAN ONE METER WIDE. THE LARGEST VEIN IS 1 KM LONG AND AS MUCH AS 3 M WIDE. PRINCIPAL VEINS ARE GROUPED AS THE MIMOSA, ACCHILA, ESTELA, TENTADORA, SACRAMENTO, HERMINIA AND RITA AND MANTO GROUPS, THE HERMINIA AND TENTADORA BEING THE MOST PRODUCTIVE. FOUR SEPARATE HYDROTHERMAL SYSTEMS HERMINA, MIMOSA, ESTELA, AND TENTADORA. CENTRAL PART OF DISTRICT (TENTADURA) IS CHARACTERIZED BY PYRITE-GOLD-TUNGSTEN MINERALIZATION. OUTWARD IN MIMOSA SYSTEM TETRAHEDRITE/TENNANTITE WITH GALENA IN OUTER ZONES IS CHARACTERISTIC. IN ESTELLA TENNANTITE/TETREHEDRITE-CHALCOPYRITE-ARSENOPYRITE-BISMUTHINITE-WITH LATE SPHALERITE-GALENA IS CHARCTERISITC. MINOSA MINE CONTAINS VEINS: PORVENIR, SAN DEMETRIO, A, MIMOSA, KEKO, GABY, BARBARA, CARMEN, HADA, SAN PEDRO, APOLLO II. HERMININA MINE CONTAINS VEINS: POZO, DOCENITA, ANO, LUZ, 2NW, ESPERANZA, SAN JOSE, TERESA, SANTO DOMINGO.
Deposit PRINCIPAL SULFIDE MINERALS IN DEPOSIT ARE: PYRRHOTITE, ARSENOPYRITE, CHALCOPYRITE IN COBRIZA LIMESTONE. ARGENTIFEROUS GALENA IS FOUND IN SUBORDINATE FRACTURES IN SHALES OF THE COPACABANA, IN MONZONITE, AND IN ANDESITE DIKES.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1973 Goudarzi, Gus H. (Theune, C. T.) U.S. Geological Survey
Updater 01-APR-1981 Ericksen, George E. U.S. Geological Survey
Updater 01-AUG-1993 Page, Norman J. U.S. Geological Survey
Updater 01-DEC-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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