Mina A

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. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Production statistics
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10060284
MRDS ID TC10297
Record type Site
Current site name Mina A

Geographic coordinates

Geographic coordinates: -61.81327, 7.41037 (WGS84)
Relative position ABOUT 3.5 KM NW OF ROAD INTERSECTION BETWEEN ROAD TO LO INCREIBLE AND ROAD BETWEEN GUASIPATI AND EL CALLAO.

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
Clay Gangue
Quartz Gangue

Alteration

  • (Local) Local Argillization

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 Host
    Rock type Metamorphic Rock > Metavolcanic Rock
    Rock unit name Yuruari Formation
    Rock description Yuruari Formation
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1) -61.81327, 7.41037

Economic information

Geologic structures

Type of structure Local
Structure description Laguna Dike

Ore body information

  • Thickness 0.1M

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No

Mining district

District name Lo Increible District

Production statistics

  • Year 1989
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^80 G/T
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 80g/mt

Comments on the production information

  • IN 1988, WERE MINING BOTH QUARTZ VEINS AND OLD TAILINGS - RECOVER 12 KG AU/MONTH FROM OLD TAILINGS; IN THREE MONTHS PRODUCED 45 KG OF AU. THE MINE PRODUCED ABOUT 350 TONS OF VEIN QUARTZ PER MONTH AT AN AVERAGE GRADE OF 80 G/T.

Comments on the workings information

  • OPEN PIT, 1989, USING BULLDOZER TO BREAK UP QUARTZ VEINS.

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, EDO BOLIVAR, MINISTERIO DE ENERGIA Y MINAS, 67 P.

  • Deposit

    MARSH, SHERMAN, PIERCE, H.A., SANCHEZ, HENRY, AND PAGE, N.J, (1992), THE GEOCHEMISTRY OF SIX GOLD-BEARING QUARTZ-CARBONATE TOURMALINE AREAS, ESTADO BOLIVAR, VENEZUELA: U.S. GEOLOGICAL SURVEY BULLETIN [IN PRESS}.

  • Deposit

    LOCHER, EUGENIO, 1974, ORO EN VENEZUELA: MEMORIA DE LA NOVENA CONF. GEOL. INTER-GUAYANAS, PUBL. ESP. 6, P. 558-587.

  • Other Database

    CIMRI

  • Production

    MARSH, ET AL, 1989

General comments

Subject category Comment text
Deposit VISIBLE NATIVE GOLD IN QUARTZ VEINS. LOCHER (1974) REPORTS THAT EXPLOITATION OF ALLUVIAL GOLD IN THE VICINITY OF, AND DOWNSTREAM FROM, THE MINE IS POSSIBLE. QUARTZ BOULDERS ARE AS MUCH AS A METER OR MORE IN DIAMETER AND WHEN BROKEN OPEN CONTAIN VISIBLE AU.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1991 Page, Norman J. U.S. Geological Survey
Updater 01-SEP-1991 Carbonaro, Marguerite M. (Orris, Greta J.) U.S. Geological Survey

Beyond USGS

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