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  3. Mineral Resource Data System (MRDS)

Gentio Do Ouro Gold

Producer in Bahia, Brazil with commodity Gold
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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. Nearby scientific data
  8. Ore body information
  9. Controls for ore emplacement
  10. Economic information about the deposit and operations
  11. Workings at the site
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10110381
MRDS ID W002354
Record type Site
Current site name Gentio Do Ouro Gold

Geographic coordinates

Geographic coordinates: -42.49897, -11.41448 (WGS84)

Site location context

Political divisions (FIPS codes)

Bahia(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Bahia

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Nearby scientific data

(1) -42.49897, -11.41448
ListMap

Economic information

Ore body information

  • General form IRREGULAR (VEIN) AND TABULAR (FAULT ZONE)
    Strike N 45 E}
    Dip 50 SE}
    Length 250M
    Width 20M

Controls for ore emplacement

  • Fault Zone

Comments on the geologic information

  • LACK OF WATER FOR PANNING RESTRICTED MINING TO EASIEST AND MOST EASILY DUG GROUND, LACK OF PROPER TOOLS FURTHER RESTRICTED MINING TO NEAR THE SURFACE. ONLY INDURATED FAULT BRECCIA HAVE BEEN MINED.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1925

Comments on the production information

  • DURING PERIOD 1938-1940 A TOTAL OF 8000 MINERS PRODUCED ABOUT 25-30 KILOGRAMS PER WEEK; TODAY 10 MINERS PRODUCE ABOUT 400 GRAMS PER WEEK.

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 10M

Comments on the workings information

  • THE ABOVE DESCRIPTION REFERS TO THE FAULT ZONE CONTAINING THE GOLD.

Reference information

Bibliographic references

  • Deposit

    POMERENE, J.B. AND URIAS RODRIRUES DA SILVA, MONTHLY REPORT, BRAZIL PROJECT, AUGUST 1968; INTRODUCTORY MEMORANDUM ON GOLD NEAR GENTIO DO OURO, BAHIA

  • Deposit

    MONTHLY REPORT, BRAZIL PROJECT, FEB. 1969, GOUDARZI, G.H.

General comments

Subject category Comment text
Deposit Discovery Year: EARLY TWENTIETH CENTURY
Deposit THE N.W. WALL OF THE FAULT IS HORIZONTAL, MEDIUM GRAINED QUARTZITE. THE S.E. WALL IS NOT EXPOSED IN THE OLD WORKINGS. THE SURFACE IS LIGHT COLORED SOIL-MOSTLY SAND AND TAN CLAY. WHERE THE FAULT CROSSES THE MIROROS-IBIPEBA ROAD, THE S.E. SIDE CONSISTS OF BRIGHT RED SOIL CHARACTERISTIC OF WEATHERED GABBRO. THE GABBRO, QUARTZ VEIN, GOLD EXISTS IN OTHER PARTS OF BAHIA (IPUPIARA) AS WELL AS HERE. IT SEEMS THAT DETAILED MAPPING OF ALL GABBRO BODIES, ALL MAJOR QUARTZ VEINS AND ALL MAJOR FAULTS MIGHT REVEAL LOCALITIES WHERE THE RELATION AMONG THESE FACTORS IS PRESENT FOR THE DEPOSITION OF GOLD IN THIS AREA. THE NEXT STEPS WOULD BE SAMPLING, AND DRILLING. RESIDUAL GOLD EXISTS IN FROM ONE TO 1.5 METERS OF GRAVEL UNDERLYING ABOUT 3 METERS OF CANGA CONGLOMERATE WHICH IN TURN IS COVERED BY LATERITE. THE CANGA IS A FRACTURE FILL AND CONSISTS OF SUBROUNDED TO SUB-ANGULAR TO ANGULAR FRAGMENTS AND BOULDERS OF SANDSTONE, QUARTZITE AND QUARTZ AS MUCH AS 50 CM IN DIAMETER. THE QUARTZ IS GENERALLY
Deposit WHITE, LOCALLY VUGGY AND IN PLACES RICH IN IRON. THE QUARTZ VIENS CUTTING THE ADJOINING COUNTRY ROCKS MAY BE THE SOURCE OF GOLD IN THE GRAVELS UNDERLYING THE CANGA. RECORD W002371 BY THOMAS M. WARFLE HAS BEEN INCORPORATED INTO THIS RECORD.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1974 Warfle, Thomas M. U.S. Geological Survey
Updater 01-MAY-1974 Warfle, Thomas M. U.S. Geological Survey

Beyond USGS

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

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