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San Gregorio

Producer in Pasco, Peru with commodities Bismuth, Silver, Lead, Zinc
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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. 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 10068928
MRDS ID W002203
Record type Site
Current site name San Gregorio
Alternate or previous names Veins: La Perla, Azulmina

Geographic coordinates

Geographic coordinates: -76.25805, -10.47293 (WGS84)
Elevation 4100
Relative position THE SAN GREGORIO MINE IS AT THE SOUTH BASE OF CERRO MARCAPUNTA, ABOUT 1.5-2 KM EAST OF HUARAUCACA SMELTER 6 KM SOUTH OF COLQUIJIRCA AND 12-13 KM SOUTH OF CERRO DE PASCO IN THE PROVINCIA DE PASCO.

Site location context

Political divisions (FIPS codes)

Pasco(province)

Peru(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Peru Pasco

Comments on the location information

  • NO. 15 ON METALLOGENIC MAPS OF PERU, 1969

Commodities

Commodity Importance
Bismuth Critical Primary
Silver Secondary
Lead Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Argentite Ore
Chalcopyrite Ore
Galena Ore
Jamesonite Ore
Marcasite Ore
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore
Stibnite Ore
Calcite Gangue
Siderite Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Pocobamba Formation, Sandstone, Shale
    Rock description Pocobamba Formation, Sandstone, Shale

Nearby scientific data

(1) -76.25805, -10.47293
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description The Ore Deposit Is On A Small Rise A Few Hundred M Long And Several Tens Of Meters Wide In Sandstone And Shale Of The Pocobamba Formation (Tertiary). The Beds Are On The West Limb Of A Small Anticline Near The Crest, Striking Nw And Dipping Moderately Sw.

Ore body information

  • Name SURFACE
    Strike NW}NW
    Dip SW}VERTICAL
    Thickness 0.45M
    Length 300M
    Width 12M
    Depth to bottom 10M
  • Name UNDERGROUND
    Strike NW}NW
    Dip SW}VERTICAL
    Length 700M
    Width 150M

Controls for ore emplacement

  • See Comments

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1905
Discoverer Fernandini Interests

Ownership information

  • Type Owner
    Owner S. M. R. L. San Gregorio

Production statistics

  • Year 1940
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^3% Bi. 150-200 G/T Ag.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Silver Silver 175g/mt
    Ore Bismuth Bismuth 3wt-pct

Comments on the production information

  • 1989 PRODUCTION FOR 5 MONTHS, 1990 FOR JAN AND FEB.

Reserves and resources

  • Type In-situ
    Estimate year 1990
    Total resources 9180000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 714.445 g/mt Silver Minor 1990
    Lead Pb 5.61 wt-pct Lead Minor 1990
    Zinc Zn 2.66 wt-pct Zinc Minor 1990

Comments on the reserve resource information

  • ALSO 0.14% SB AND 0.04% AS.
  • THE STATUS OF THE DEPOSIT NOT KNOWN-SIMONS 1960 REPORTED THAT IT MIGHT BE EXHAUSTED

Workings at the site

  • Type of workings Surface/Underground
    Length 8000M

Comments on the workings information

  • OPEN PIT WAS 250-300 M LONG, 12-15 M WIDE, 10-12 M DEEP. UNDERGROUND ARE 4 LEVELS

Comments on development

  • ORE WAS CONCENTRATED BY HAND DURING FIRST YEARS OF OPERATION, AND A PRODUCT CONTAINING ABOUT 20% BISMUTH WAS PRODUCED. ABOUT 1915, LEACHING AND SMELTING OF LOWER GRADE REJECTS, CONTAINING 5% OR SO BISMUTH, WAS BEGUN.

Reference information

Bibliographic references

  • Deposit

    SIMONS, FRANK, 1960, UNPUBLISHED REPORT, P. 1486

  • Deposit

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

  • Deposit

    MILLER, B.L., AND SINGEWALD, J.T., 1919, THE MINERAL DEPOSITS OF SOUTH AMERICA: 598 P., NEW YORK, MCGRAW-HILL, P. 462-463

  • Deposit

    FORT, MICHEL, 1926, LA INDUSTRIA MINERA DEL PERU EN EL ANO DEL CENTENARIO 1921: BOL. MINAS, IND. Y CONSTR., SER. 2, V. 15, P. 70-71.

  • Deposit

    AHLFELD, FRIEDRICH, 1932, DIE SILBERERZLAGERSTATTE COLQUIJIRCA, PERU: ZEITSCHR PRAKT. GEOLOGIE, V. 40, P. 86

  • Deposit

    SINGEWALD, JOSEPH T., JR., AND MILLER, B.L., 1916, THE CERRO DE PASCO DISTRICT, PERU: ENG. MIN. JOUR., V. 101, P. 1015-1018.

  • Deposit

    OCOLA AQUICE, P., 1990, INFORME TECNICO MINA SAN GREGORIO: BANCO MINERO DEL PERU, COD.B6149.

  • Deposit

    1960 COMPILE FRANK SIMONS, UNPUB. REP

  • Production

    F. SIMONS, 1960, OCOLA AQUICE (1990)

General comments

Subject category Comment text
Deposit SEE RECORD NUMBER PAS0042.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1973 Shaffer, Glenn L. U.S. Geological Survey
Updater 01-JUL-1994 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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