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Toromocho

Producer in Junin, Peru with commodities Antimony, Bismuth, Copper, Gold, Molybdenum, Silver, Tungsten, Uranium
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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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10207032
MAS/MILS ID 3330210014
Record type Site
Current site name Toromocho

Geographic coordinates

Point of reference Claim
Geographic coordinates: -76.15, -11.6 (WGS84)
Elevation 4500
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Junin(province)

Peru(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Peru Junin

Commodities

Commodity Importance
Antimony Critical Tertiary
Bismuth Critical Tertiary
Copper Primary
Gold Secondary
Molybdenum Secondary
Silver Secondary
Tungsten Critical Tertiary
Uranium Tertiary

Materials information

Materials Type of material
Bismuthinite Unknown
Chalcocite Unknown
Chalcopyrite Unknown
Covellite Unknown
Enargite Unknown
Galena Unknown
Magnetite Unknown
Molybdenite Unknown
Pyrite Unknown
Quartz Unknown
Sphalerite Unknown
Tennantite Unknown

Nearby scientific data

Claim (1) -76.15, -11.6
ListMap

Economic information

Ore body information

  • Length 900M
    Width 450M
    Area 1000HA
    Depth to top 250M
    Field Value
    Type of Orebody #1 STOCKWORK
    Shape of Orebody #1 MASSIVE
    Type of Orebody #2 BRECCIA FILL
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin OXIDATION
    Primary Ore Control FRACTURING
    Secondary Ore Control IGNEOUS
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 ADV ARGILLIC
    Type of Wallrock Alter. #2 SERICITIC
    Type of Wallrock Alter. #3 PROPYLITIC
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 40
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 1000
    Date of Last Modification 810409

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Metallic
Significant Yes
Mining method Open Pit
Milling method Flotation
Production years Dec. 2013,

Mining district

District name Morococha Mining District

Mineral rights holdings

Type of mineral rights State Lease

Land status

Ownership category State

Ownership information

  • Type Owner-Operator
    Owner Centromin
    Interest 100
    Home office Peru
    Year 1994
  • Type Owner
    Owner Chinalco Mining Corp. International
    Year 2014

Comments on the production information

  • SB, WO3 AND BI WILL NOT BE CONSIDERED FOR CREDIT OR PENALTY ACCORDING TO MAFO INFORMATION.

Reserves and resources

  • Type In-situ
    Estimate year 1981
    Demonstrated 584000000mt ore
    Total resources 584000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.35 wt-pct Copper Major 1981
  • Type In-situ
    Estimate year 1981
    Demonstrated 594000000mt ore
    Total resources 594000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 10 g/mt Silver Minor 1981
    Gold Au 0.15 g/mt Gold Minor 1981
    Copper Cu 0.68 wt-pct Copper Major 1981
    Molybdenum Mo 0.013 wt-pct Molybdenum Minor 1981
  • Type In-situ
    Estimate year 1993
    Demonstrated 86240000mt ore
    Total resources 86240000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 9 g/mt Silver Minor 1993
    Copper Cu 0.89 wt-pct Copper Major 1993
  • Type In-situ
    Estimate year 1981
    Demonstrated 594000000mt ore
    Total resources 594000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 10 g/mt Silver Minor 1981
    Gold Au 0.15 g/mt Gold Minor 1981
    Copper Cu 0.68 wt-pct Copper Major 1981
    Molybdenum Mo 0.013 wt-pct Molybdenum Minor 1981

Comments on the reserve resource information

  • E/MJ, 11/84, P67; E/MJ, 8/84, P48. (12/31/83)
  • QUANTITY MARIX 1 IS BASED ON GOLDER ASSOCIATES DATA AND ON GOLDER & MAFO REVISION OF FORMER DATA. (E. BOYLE, MAFO, JAN. 16, 1981 ). QUANTITY MATRIX 2 IS BASED ON GOLDER ASSOCIATES DATA AND ON GOLDER & MAFO REVISION OF FORMER DATA. ( E. BOYLE, MAFO, JAN. 16, 1981 ). 25-PERCENT AND 10-PERCENT PROBABILITY LEVEL QUANTITIES IN MATRICES 1 AND 2 ARE CONSERVATIVE ESTIMATES.
  • OXIDE RESOURCE IS 584 MILLION MT @ 0.35 % CU USING 0.20 % CU CUTOFF.

Workings at the site

  • Type of workings Surface
    Area 1000HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method BENCH (BERM)
    Percent Waste Rock 50
    Avg. Overburden Thickness 40
    Primary Material Cover SAND, GRAVEL
    Percentage 20
    Secondary Material Cover M-HARD ROCKS
    Percentage 80
    Hardness of Ore HARD ROCKS
    Avg. Bench Height (meters) 15
    Max. Pit Slope (degrees) 50
    Capacity 30000
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 15700
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 2
    Year of Information 1987
  • Type of workings Surface
    Area 1000HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method BENCH (BERM)
    Percent Waste Rock 16.6
    Hardness of Ore HARD ROCKS
    Avg. Bench Height (meters) 15
    Max. Pit Slope (degrees) 50
    Capacity 300000
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 1
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 2
    Year of Information 1987
  • Type of workings Surface
    Area 1000HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 3
    Status of Mining Method PROPOSED
    Mining Method BENCH (BERM)
    Percent Waste Rock 50
    Avg. Overburden Thickness 40
    Primary Material Cover SAND, GRAVEL
    Percentage 20
    Secondary Material Cover M-HARD ROCKS
    Percentage 80
    Hardness of Ore HARD ROCKS
    Avg. Bench Height (meters) 15
    Max. Pit Slope (degrees) 50
    Capacity 38860
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 2
    Year of Information 1987

Reference information

Bibliographic references

  • Reserve-Resource

    TOROMOCHO: A PROJECT IN SEARCH OF PARTNERS. ENGINEERING AND MINING JOURNAL, NOV. 1979, P.133.

  • Deposit

    Mining Engineering, 2014, Toromocho Mine begins production in Peru; Openpit mine is owned by China's state-owned Chinalco: Mining Engineering, Jan. 2014, v. 66, no. 1, p. 15.

  • Reserve-Resource

    ENGINEERING AND MINING JOURNAL, NOV. 1984, P.67.

  • Reserve-Resource

    CENTROMIN PERU, TOROMOCHO PROJECT, 1992, 5PP.

  • Deposit

    EYZAGUIRRE, V., MONTOYA, D., SILBERMAN, M., NOBLE, D., 1975, IGNEOUS ACTIVITY AND MINERALIZATION, MOROCOCHA DIST., PERU: GEOL. VOL. 70, NO. 6, P. 1123.

  • Deposit

    ANDEAN AIR MAIL - PERUVIAN TIMES,1974, ANDEAN TIMES: PERU MI SURVEY: ANDEAN TIMES, WEEKLY, VOL. 34, NO 1764, 88P

  • Deposit

    ANDEAN-PERUVIAN TIMES, 1974, DEVELOPMENT AND EXPANSION PROJE LIMA, PERU, VOL. 34, NO. 1764, P. 60.

  • Deposit

    MINING JOURNAL, TOROMOCHO DEVELOPMENT UNDERWAY: FEBRUARY 15, 1974.

  • Deposit

    METALS SOURCEBOOK, PERU: FEBRUARY 25, 1974.

  • Deposit

    METALS SOURCEBOOK, PERU: MARCH 11, 1974.

  • Deposit

    MINING JOURNAL, TOROMOCHO BID: AUGUST 1, 1975, P. 87.

  • Deposit

    WORLD MINING CATALOG, SURVEY AND DIRECTORY NUMBER, PERU: V. 29, NO. 7, 1976, P. 186.

  • Deposit

    MINING MAGAZINE, PERUVIAN COPPER: V. 134, NO. 2, 1976, P. 131.

  • Deposit

    WORLD MINING, LATIN AMERICA: PERU: FLUOR UTAH HEADS STUDY GROUP FOR TOROMOCHO COPPER PORPHYRY PROJECT: V. 29, NO. 2, 1976.

  • Deposit

    ENGINEERING AND MINING JOURNAL, TOROMOCHO: V. 176, NO. 10, 1975.

  • Deposit

    METALS SOURCEBOOK, PERU: OCTOBER 28, 1974.

  • Deposit

    METALS SOURCEBOOK, COPPER: JUNE 4, 1973.

  • Deposit

    WORLD MINING, PERU: V. 27, NO. 6, 1974, P. 59.

  • Deposit

    MINING MAGAZINE, THE MINERAL INDUSTRY OF PERU: V. 131, NO. 4, 1974, P. 262-263, 271, 275.

  • Deposit

    MEMORANDUM, U. S. BUREAU OF MINES, WASHINGTON D. C.: DECEMBER 16, 1974.

  • Deposit

    MINING MAGAZINE, PERU: V. 140, NO. 1, 1979, P. 68.

  • Deposit

    ENGINEERING AND MINING JOURNAL, COPPER: SOUTH AMERICA AND CARIBBEAN: V. 179, NO. 1, 1978, P. 70.

  • Deposit

    ENGINEERING AND MINING JOURNAL. CENTROMIN PERU AND MINERO PERU. NOV. 1979, PP. 128-141.

  • Deposit

    GOLDER ASSOCIATES REPORT ON TOROMOCHO PREPARED FOR THE U.S. BUREAU OF MINES, MAS, 1980, 11 PP.

  • Deposit

    EL YACIMIENTO POLIMETALICO DE TOROMOCHO. MENSAJE DEL PRESIDENTE EJECUTIVO DE CENTROMIN PERU, 1974?, PP. 6-20.

  • Deposit

    CERRO DE PASCO CORPORATION. LETTER OF TRANSMITTAL MOROCOCHA LOW GRADE PROJECT. NOV. 4, 1968.

  • Deposit

    WORLD MINING, JULY 1981

  • Deposit

    MINING JOURNAL, JULY 1, 1983

  • Deposit

    MINE DEVELOPMENT MONTHLY, SEPT. 1981

  • Deposit

    ENGINEERING AND MINING JOURNAL, 8/84, P.48.

Reporter information

Type Date Name Affiliation Comment
Reporter 1995-03-02 Porter, Kenneth E. U.S. Bureau of Mines
Editor 2014-02-06 Wilson, Anna B U.S. Geological Survey

Beyond USGS

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

Maps centered on this site