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Fortuna Mine

Past Producer in Ancash, Peru with commodities Lead, Silver, 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. 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. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10080297
MRDS ID W031411
Record type Site
Current site name Fortuna Mine

Geographic coordinates

Geographic coordinates: -77.10531, -9.52214 (WGS84)
Elevation 4713
Location accuracy 10000(meters)
Relative position 1 KM N 23 W OF OUTLET OF THE LAKE ANTAMINA; 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 A SADDLE ON THE DIVIDE BETWEEN QUEBRADA ANTAMINA AND THE CIRQUE TO THE NORTHWEST.
  • THE AREA LIES WEST OF CORDILLERA HUAYHUASH AT THE HEADWATERS OF THE PATIUILCA RIVER. MOST OF THE MINES AND PROSPECTS ARE IN THREE MAJOR U-SHAPED VALLEYS LYING TO EAST AND NORTH OF PACHAPAQUI.

Commodities

Commodity Importance
Lead Primary
Silver Primary
Zinc Critical Secondary

Materials information

Materials Type of material
Galena Ore
Pyrargyrite Ore
Pyrite Ore
Sphalerite Ore
Calcite Gangue

Alteration

  • (Local) Limestone And Dike Rocks Are Pyritized; Altered Phenocrysts Of Dike Rock

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Jumasha Limestone
    Rock description Jumasha Limestone

Nearby scientific data

(1) -77.10531, -9.52214
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 Nw Trending Dikes Intrude Area

Ore body information

  • Name MAIN VEIN
    General form TABULAR
    Strike NNW}
    Dip 45-55 W}
    Thickness 1.05M
    Length 55M
    Width 17M
  • Name VEIN NE OF DIKE
    General form TABULAR
    Dip 45-55 W}
    Thickness 0.25M
    Length 5M
    Width 7M

Controls for ore emplacement

  • Fissures And Shear Zones

Comments on the geologic information

  • LIMESTONE STRIKING NW AND GENTLY DIPPING CUT BY N15W, 45 SW RHYOLITE DIKE. FISSURES AND VEINS PARALLEL TO SEMIPARALLEL TO DIKE AND WITHIN 50 M OF THE DIKE.
  • THE GEOLOGY OF THIS AREA IS SIMILAR TO THAT OF THE HUALLANCA DISTRICT.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1860

Mining district

District name Antamina Mining District

Land status

Ownership category Private

Comments on the production information

  • ACTIVE IN 1948. INACTIVE LITTLE DEVELOPED PRODUCER.
  • SEVERAL THOUSAND TONS OF ORE HAS BEEN MINED AND SHIPPED. MOST PRODUCTION OCCURRED WITHIN A FEW YEAR OF 1950 ACCORDING TO BODENLOS AND ERICKSEN. INTERMITTENT PRODUCER.

Comments on the reserve resource information

  • THE MINE WAS THE LARGEST PRODUCER OF THE AREA IN 1948 AND CONTAINS MODERATE RESERVES.
  • BODENLOS AND ERICKSEN, 1955, P. 125.
  • POSSIBLE MAGNETUDE OF 1-10 MILLION TONS

Comments on the workings information

  • VEINS OF THE DEPOSIT HAVE BEEN EXPOSED BY PITS, DRIFTS, AND SMALL STOPES.
  • SEVERAL SMALL LOCALITIES PRODUCED FROM PITS, TRENCHES, SHORT ADITS, DRIFTS, AND STOPES.

Comments on development

  • THE OPERATION INCLUDES A CONCENTRATION PLANT ON THE NORTH SIDE OF PACHAPAQUI. THE MILL WAS RATED AT 30 TONS PER DAY.

Reference information

Bibliographic references

  • Deposit

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

  • Other Database

    CIMRI

  • Production

    BODENLOS AND ERICKSEN (1955).

  • Reserve-Resource

    BODENLOS AND ERICKSEN (1955)

General comments

Subject category Comment text
Deposit APPROXIMATE DIMENSTIONS OF MINERALIZED AREA 3 X 10 KM
Deposit SEE RECORD NUMBER ANC0051. ; INFO.SRC : 1 PUB LIT

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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