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Orcopampa

Plant in Arequipa, Peru with commodities Gold, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Nearby scientific data
  7. Economic information about the deposit and operations
  8. Mining district
  9. Mineral rights holdings
  10. Land status
  11. Ownership information
  12. Production statistics
  13. Reserves and resources
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10158403
MRDS ID ARE0078
MAS/MILS ID 3330070008
Record type Site
Current site name Orcopampa
Related records 10005683

Geographic coordinates

Point of reference Town
Geographic coordinates: -72.38292, -15.33104 (WGS84)
Elevation 3800
Location accuracy 5000(meters)

Site location context

Political divisions (FIPS codes)

Arequipa(province)

Peru(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Peru Arequipa

Commodities

Commodity Importance
Gold Primary
Silver Primary

Nearby scientific data

Town (1) -72.38292, -15.33104
ListMap

Economic information

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1960
Mining method Shrinkage Methods
Year of first production 1967
Plant type Beneficiation (Mill)
Plant subcategory Flotation
Milling method Flotation

Mining district

District name Castilla

Mineral rights holdings

Type of mineral rights Private Lease

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Cia. Minera Orcopampa S. A.
    Interest 100
    Home office Peru
    Year 1991
  • Type Owner
    Owner Cia. Minera Orcopampa S. A.
    Interest 100
    Home office Peru
    Year 1991

Production statistics

  • Year 1987
    Description Mill Feed Capacity 909 Mt/Day
  • Year 1989
    Description Commodity, Gold 2272 Oz Contained Au
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 70667.1g
  • Year 1989
    Description Commodity, Silver 5180000 Oz Contained Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 161116031.58g
  • Year 1989
    Description Mill Feed Capacity 1200 Mt/Day
  • Year 1989
    Description Commodity, Copper 560 Short Tons, Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Copper Copper 617.29mt
  • Year 1991
    Accuracy Estimate
    Description Current Ore Production Estimate 1100 Mt/Day

Comments on the production information

  • ORE CAPACITY WAS INCREASED TO 1200 TPD IN 1989.

Reserves and resources

  • Type In-situ
    Estimate year 1989
    Demonstrated 1400000mt ore
    Total resources 1400000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 469.7 g/mt Silver Major 1989
    Gold Au 2.7 g/mt Gold Major 1989
  • Type In-situ
    Estimate year 1991
    Demonstrated 1254638mt ore
    Total resources 1254638mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 387.43 g/mt Silver Major 1991
    Gold Au 2.74 g/mt Gold Major 1991
  • Type In-situ
    Estimate year 1993
    Indicated 2220000mt ore
    Demonstrated 2220000mt ore
    Total resources 2220000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 4 g/mt Gold Major 1993
    Silver Ag 472.77 g/mt Silver Major 1993

Comments on the reserve resource information

  • GRADE DATA FORM THE 1987-88 EMJ DIRECTORY, AG - 497PPM; AU - 4.3PPM, RESERVE DATA NOT AVAILABLE.
  • PROVEN + PROBABLE (966,153 MT + 258,458 MT = 1,224,611 MT). PUBLISHED TOTAL RESERVES WERE LISTED AS 1,254,638 MT, A DIFFERENCE OF SOME 30,027 MT OF ORE. SEE R BIBLY 001, 002.
  • ORIGINAL PROPERTY ENTRY WAS IN 1976 UNDER MAS SEQ # 3330070999, THIS # WAS CORRECTED TO 3330070008, DATE OF THIS ENTRY WAS SEPT. 1991. PROPERTY WAS DELETED AND REENTERED UNDER SAME SEQ # IN AUG. 1992. SOME DATA IN 1991 FILE WAS MISSING AND COULD NOT BE ENTERED, SO A NEW FILE WAS STARTED.
  • Q-MATRIX 1- DATA USED IN THE MAY 1983 PROPERTY EVALUATION.

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method SHRINKAGE METHODS
    Hardness of Rock UNKNOWN
    Rock Characteristics UNKNOWN
    Rock Support Chars. UNKNOWN
    Mine Support Chars. UNKNOWN
    1st Condition of Workings OPEN
    2nd Condition of Workings OPEN
    3rd Condition of Workings OPEN
    Capacity 1100
    Capacity Units MT ORE/DAY
    Operating Days per Year 330
    Operating Shifts per Day 3
    Year of Information 1991

Comments on other economic factors

  • A CYANIDATION PLANT WAS INSTALLED TO TREAT GRAVIMETRIC COMS. ALLOWING THE RECOVERY OF 2,272 OZ AU AND 6,590 OZ OF AG, 1989

Reference information

Bibliographic references

  • Deposit

    E & MJ INTERNATIONAL DIRECTORY OF MINING, 1987-88

  • Reserve-Resource

    US EMBASSY DATA, 1989 ?.

  • Reserve-Resource

    THE PRUE REPORT'S "LAS MINAS DEL PERU" - "MINES AND MINERS

  • Reserve-Resource

    OF PERU", PP 215-217.

  • Reserve-Resource

    AME MINERAL ECONOMICS QUARTERLY MINE ANALYSIS, JUNE 1993,

  • Reserve-Resource

    P. 31, 44.

General comments

Subject category Comment text
Deposit PUBLIC MINE OUTPUT AT 909MT/DAY, GRADE AG AT 497 PPM; AU AT 4.3 PPM, 1987-88. RESERVE DATA NOT AVAILABLE. 6/27/97--CONFIRMED WITH COUNTRY SPEC. THAT MINE IS PRODUCING.

Reporter information

Type Date Name Affiliation Comment
Reporter 20-JUN-1997 Peterson, Gary R. U.S. Bureau of Mines

Beyond USGS

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

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