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San Cristobal Mine - 5

Producer in Junin, Peru with commodities Zinc, Lead, Copper, Silver, Tungsten, Gold
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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. Reserves and resources
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10068783
MRDS ID W002033
Record type Site
Current site name San Cristobal Mine - 5
Alternate or previous names San Cristobal and Huaripampa Polymetallic Zones, Mahr Tunnel. Veins: Main Vein, Siberia 1

Geographic coordinates

Geographic coordinates: -76.06639, -11.73121 (WGS84)
Elevation 4720
Relative position 110 KM EAST OF LIMA , 20 KM SE FROM MOROCOCHA

Site location context

Political divisions (FIPS codes)

Junin(province)

Peru(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Peru Junin

Comments on the location information

  • MINES ON AND AROUND CERRO RICO DE POTOSI

Commodities

Commodity Importance
Zinc Critical Primary
Lead Primary
Copper Primary
Silver Secondary
Tungsten Critical Secondary
Gold Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Marcasite Ore
Pyrargyrite Ore
Pyrite Ore
Sphalerite Ore
Wolframite Ore
Hematite Gangue
Muscovite Gangue
Quartz Gangue

Analytical data

Result ISOTOPES: PB(206)/PB(204)"18.93, PB(207)/PB206"832. CAMPBELL AND OTHERS (1984): OXYGEN ISOTOPE VALUES FOR QUARTZ 9.8 TO 14.4 PER MILLION AND FOR WOLFRAMITE 0.6-4.6 PER MILLION. HYDROGEN DELTA D VALUES ARE -58 TO -148 PER MILLION. FLUID INCLUSIONS TEMPERATURE 230-330 DEGREES C., SOME 150-230 DEGREES C. THAT MAY BE SECONDARY. SALINITIES OF 2.7-6.3 EQUIVALENT WEIGHT % NACL.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Monzonite
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Excelsior Group;Catalina;Pucara Group;Goyllarisquisga Group
    Rock description Excelsior Group;Catalina;Pucara Group;Goyllarisquisga Group

Nearby scientific data

(1) -76.06639, -11.73121
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Chumpe Anticline
Type of structure Local
Structure description Chumpe Anticline In Southern Part Of Yauli Dome N 45 W

Ore body information

  • Name GENERAL DEPOSIT
    General form TABULAR
    Strike NE}N75E}
    Dip SE}}
    Length 2500M
    Width 2.44M
    Depth to top 500M
  • Name SAN CRISTOBAL MAIN VEIN
    General form TABULAR
    Dip SE}}
  • Name SIBERIA 1 VEIN
    General form TABULAR
    Dip SE}}

Controls for ore emplacement

  • Intense Fracturing Of The Volcanica Lithology And The Shape Of Volcanic-Phyllite Contact And Orientation Of Shear Stresses In The Rocks. In San Cristobal Mine, Silver Accompanies Both The Copper And Lead-Zinc Ore. Silver Minerals Occur As Inclusions In Galena. Sphalerite Contains Chalcopyrite Blebs

Comments on the geologic information

  • STRONG SILICIFICATION IN UPPER STOCK; STOCK CONSTRICTED AT DEPTH. THERE ARE 35 MAJOR VEINS IN THE SURFACE ZONE THAT CONVERGE TO GIVE SIX GROUPS AT DEEPER LEVELS, SOME IN THE PALE-0Z0IC PHYLLITES.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1928
Discoverer Cerro De Pasco Corporation
Year of first production 1938

Mining district

District name San Cristobal-Carahuacra District

Ownership information

  • Type Owner-Operator
    Owner Centromin

Comments on the production information

  • APPROXIMATELY 30 PERCENT OF PRODUCTION COMES FROM COOPERATIVES AND SMALL MINERS OF ADJOINING CLAIMS. PRESENTLY THIRD LARGEST TIN PRODUCER OF BOLIVIA

Reserves and resources

  • Type In-situ
    Estimate year 1977
    Total resources 20000000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 10 wt-pct Zinc Major 1977
    Lead Pb 1 wt-pct Lead Major 1977
    Copper Cu 1 wt-pct Copper Major 1977
    Silver Ag 155.517 g/mt Silver Minor 1977

Comments on the reserve resource information

  • (1) ESTIMATED AT 100% OF POSITIVE AND PROBABLE RESERVES UNDERGROUND, (2) ESTIMATED AT 70 MILLION TONS CONTAINING 0.44 PERCENT TIN AND ASSUMING 50 PERCENT RECOVERY.
  • RESERVES ESTIMATED TO BE EQUIVALENT TO 7-8 YRS OPERATION. SILVER RESERVES HAVE BEEN LARGELY EXHAUSTED.

Comments on development

  • ECON.YEAR: 1975 ; ECON.COM: DEPLETION AFTER SEVERAL CENTURIES OF PRODUCTION, FIRST FOR SILVER AND LATER FOR TIN PLUS SILVER AT DEPTH ; MILL.CAP : 2,695,973 KG

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit THE MINERALIZED ZONE OF POTOSI COVERS AN AREA 1200M BY 1200M. MOST ORE IS ACCOUNTED FOR BY NARROW VEINS, STRINGER LODES, AND SHEETED ZONES. PARAGENESIS: (1) QUARTZ-PYRITE-CASSITERITE, (2) STANNITE-CHALCOPYRITE, (3) TETRAHEDRITE-ANDORITE, (4) FLUORITE-GALENA-PYRARGYRITE, (5) ALUNITE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1973 Goudarzi, Gus H. (Theune, C. T.) U.S. Geological Survey
Updater 01-MAY-1981 Ericksen, George E. 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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