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San Francisco Mine

Past Producer in Ancash, Peru with commodities Lead, 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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  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 10080298
MRDS ID W031412
Record type Site
Current site name San Francisco Mine
Related records 10230935

Geographic coordinates

Geographic coordinates: -77.09003, -9.51853 (WGS84)
Elevation 4585
Location accuracy 10000(meters)
Relative position 1300 METERS N 10 E OF LAKE ANTAMINA OUTLET; ABOUT 10 KM S80E OF SAN MARCOS.

Site location context

Political divisions (FIPS codes)

Ancash(province)

Peru(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Peru Ancash

Comments on the location information

  • IN NORTH WALL OF THE CIRQUE, BETWEEN FORTUNA MINE ON THE WEST AND RECOMPENSA MINE ON THE EAST.

Commodities

Commodity Importance
Lead Primary
Silver Secondary

Comments on the commodity information

  • GALENA BODIES ARE EXCEPTIONALLY PURE

Materials information

Materials Type of material
Galena Ore
Pyrite Ore
Calcite Gangue

Alteration

  • (Local) Limestone And Intrusive Rock Are Pyritized In Places.

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Jumasha Limestone;
    Rock description Jumasha Limestone;

Nearby scientific data

(1) -77.09003, -9.51853
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Folded And Faulted Sedimentary Rocks With Steeply Dipping Axial Planes Trending Nw
Type of structure Local
Structure description Intrusive Dike Or Sill At Least 20 Meters Thick, Traceable 600 Meters

Ore body information

  • Name SOUTHERNMOST VEIN
    Strike N20W}N20W}N25W
    Dip VERTICAL}80W}85 E
    Thickness 0.1M
    Length 21M
    Width 10M
  • Name MAIN VEIN
    Strike N20W}N20W}N25W
    Dip VERTICAL}80W}85 E
    Length 50M
    Width 14M
  • Name NORTHERN VEIN
    Strike N20W}N20W}N25W
    Dip VERTICAL}80W}85 E
    Length 23M
    Width 12M

Controls for ore emplacement

  • Fissures And Shear Zones

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1948

Mining district

District name Antamina Mining District

Land status

Ownership category Private

Comments on the production information

  • OPEN IN 1947 AND PRODUCING IN 1948. INACTIVE LITTLE DEVELOPED PRODUCER.

Comments on the reserve resource information

  • SMALL RESERVES, BUT ORE IS SUFFICIENTLY HIGH IN GRADE TO PERMIT MINING OF THE COMPARATIVELY SMALL VEINS.

Workings at the site

  • Type of workings Surface
    Area 0.14HA
    Overall length 64.01M
    Overall width 20M

Comments on the workings information

  • ADITS, DRIFTS AND SURFACE CUTS FOLLOW AND EXPOSE THE VEINS WHICH STRIKE NORTHWEST. MINING IS CARRIED OUT BY DRIFTING AND OVERHAND STOPING

Reference information

Bibliographic references

  • Deposit

    BODENLOS, A.J. AND ERICKSEN, G.E., 1955, LEAD ZINC DEPOSITS OF CORDILLERA BLANCA AND NORTHERN CORDILLERA HUAYHUASH, PERU. U.S.G.S. BULL. 1017, 166 P

  • Other Database

    CIMRI

  • Production

    BODENLOS AND ERICKSEN (1955).

General comments

Subject category Comment text
Deposit SEVERAL SHORT STEEPLY DIPPING VEINS, MOSTLY CONFINED TO THE INTRUSIVE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-81 Rowe, William D. (Ericksen, George E.) U.S. Geological Survey
Updater 01-MAY-94 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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