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  3. Mineral Resource Data System (MRDS)

Caylloma San Cristobal

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. 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. Production statistics
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10255548
MRDS ID W002175
MAS/MILS ID 3330070013
Record type Site
Current site name Caylloma San Cristobal
Alternate or previous names Caylloma
Related records 10068904

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -71.84961, -15.33104 (WGS84)
Elevation 4200
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Arequipa(province)

Peru(country)

South America(continent)

Land(continent)

Federal lands

Federal(land status)

Geographic areas

Country State
Peru Arequipa

Commodities

Commodity Importance
Gold Primary
Silver Primary

Materials information

Materials Type of material
Calcite Unknown
Quartz Unknown
Rhodonite Unknown

Nearby scientific data

Ore Body (1) -71.84961, -15.33104
ListMap

Economic information

Ore body information

  • Thickness 8M
    Length 3500M
    Width 300M
    Area 100HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Secondary Ore Control IGNEOUS
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 PYRITIZATION
    Type of Wallrock Alter. #2 INTERM ARGILLIC
    Strike And Dip N60E:
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 100
    Date of Last Modification 780615

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1620
Mining method Combined Methods
Year of first production 1932
Plant type Beneficiation (Mill)
Plant subcategory Flotation
Milling method Flotation

Mining district

District name Caylloma

Mineral rights holdings

Type of mineral rights State Lease
Type of mineral rights Minerals Only

Land status

Ownership category Federal

Ownership information

  • Type Owner-Operator
    Owner Cia. Minera Cayollma S. A.
    Interest 100
    Home office Peru
    Year 1971
  • Type Owner
    Owner Minas De Arcata S. A. (Hochschild Group)
    Interest 58.3
    Home office Peru
    Year 1994
  • Type Owner
    Owner Sindicato Inv. En Valores S. A.
    Interest 33
    Home office Peru
    Year 1991

Comments on the ownership information

  • OWNERSHIP RECORDS 02, 03 ARE OTHER OWNERS LISTED FOR THIS PROPERTY.

Production statistics

  • Year 1991
    Description Ore Production 700 Mt/Day
  • Year 1992
    Description Silver Production 24598 Kg
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 24598000g
  • Year 1993
    Description Silver Production 31319 Kg
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 31319000g

Reserves and resources

  • Type In-situ
    Estimate year 1975
    Measured 750000mt ore
    Demonstrated 750000mt ore
    Total resources 750000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 200 g/mt Silver Major 1975
  • Type In-situ
    Estimate year 1991
    Measured 613335mt ore
    Indicated 204445mt ore
    Demonstrated 817780mt ore
    Total resources 817780mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 421.7 g/mt Silver Major 1991
    Gold Au 51.4 g/mt Gold Major 1991

Comments on the reserve resource information

  • 1982 PROPERTY EVALUATION DATA. QUANTITY DATA WAS THE ONLY DATA ENTERED FROM THIS EVALUATION.
  • FORMERLY #3330009001A. TREATED 216,500 MT ORE IN 1989 AT 12.55 OZ AG/MT CONTAINING 2,293,000 OZ FINE AG AND 258 KG AU.
  • REC. 1 IS OLD DATA (1975), WAS CHANGED FROM REC. 3 TO REC. 1, AUG. 92. UPDATED 1991 DATA ADDED TO REC. 3 AT THAT TIME. SEE ALSO Q-M2, COL3 FOR SAME OLD DATA.

Workings at the site

  • Type of workings Underground
    Length 9000M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method COMBINED METHODS
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING NO FLOW
    Mine Support Chars. TIMBER W/LAGGING CONCRETE-UNREINFOR
    Avg. Length of Adits (m) 3000
    Number of Adits 3
    1st Condition of Workings OPEN
    2nd Condition of Workings OPEN
    3rd Condition of Workings OPEN
    Capacity 700
    Capacity Units MT ORE/DAY
    Operating Days per Year 330
    Operating Shifts per Day 3
    Year of Information 1991

Comments on other economic factors

  • FEED DATA BASED ON 1991 REFERENCE. SEE R BIBLY. RECS. 001-003.

Reference information

Bibliographic references

  • Reserve-Resource

    E & MJ INTERNATIONAL DIRECTORY OF MINING, 1975-76, P. 255.

  • Reserve-Resource

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

  • Reserve-Resource

    MINERS IN PERU".

  • Deposit

    PURSER, W. F., 1971, METAL-MINING IN PERU PAST AND PRESENT:

  • Deposit

    PRAEGER, NEW YORK, 339 PGS.

General comments

Subject category Comment text
Deposit 76-RCD 651-BENE. IS BULK FLOTATION, 82,108 MET. TONS MILLED IN (OF 84,500 MET TONS PROD.) FROM MINE. MOST OF THE DATA IS BASED ON THE 1991 REF. LISTED UNDER BIBLY. R; 001-003. 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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