La Fortaleza

Past Producer in Bolivar, Venezuela with commodity Gold
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Reserves and resources
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10067027
MRDS ID TC50061
Record type Site
Current site name La Fortaleza

Geographic coordinates

Geographic coordinates: -61.8116, 7.40814 (WGS84)

Site location context

Political divisions (FIPS codes)

Bolivar(province)

Venezuela(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Venezuela Bolivar

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Quartz Gangue

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic)
    Rock unit name El Callao Formation
    Rock description El Callao Formation
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Yuruari Formation
    Rock description Yuruari Formation

Nearby scientific data

(1) -61.8116, 7.40814

Economic information

Ore body information

  • Dip 50 NE
    Width 0.08M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Lo Increible District

Reserves and resources

  • Type In-situ
    Estimate year 1986
    Total resources 10562500000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 5 g/mt Gold Major 1986

Comments on the reserve resource information

  • CALCULATED USING THE "PRISMATOID" FORMULA.

Comments on development

  • VEIN WAS CUT BY 4 DRILL HOLES 65 M APART IN A RECTANGULAR PATTERN.

Reference information

Bibliographic references

  • Deposit

    GOMEZ, M.A., 1986, VETAS DE CUARZO AURIFERO EN LAS FORMACIONES YURUARI Y EL CALLAO EN LO INCREIBLE, EL CALLAO, ESTADO BOLIVAR: MINISTERIO DE ENERGIA Y MINAS, 67 P.

  • Deposit

    VASQUEZ, J.C., 1989, EL MINISTERIO DE ENERGIA Y MINAS Y LA EXPLORACION AURIFERA, IN PRIMER SIMPOSIO INTERNACIONAL DEL ORO EN VENEZUELA: CARACAS, GRAFICAS LOS PALOS GRANDES C.A., P. 300-324.

  • Other Database

    CIMRI

  • Reserve-Resource

    VASQUEZ, 1989.

General comments

Subject category Comment text
Deposit 2 AURIFEROUS QUARTZ VEINS OCCUR IN FOLDED SCHIST JUST NE OF THE CONTACT OF THE YURUARI FM WITH VOLCANIC ROCKS OF THE EL CALLAO FM.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1991 Orris, Greta J. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.