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Fazenda Brasilea Copper

Occurrence in Bahia, Brazil with commodities Copper, Vermiculite
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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. Host and associated rocks
  8. Nearby scientific data
  9. Controls for ore emplacement
  10. Economic information about the deposit and operations
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10069071
MRDS ID W002370
Record type Site
Current site name Fazenda Brasilea Copper
Alternate or previous names Maracas Copper

Geographic coordinates

Geographic coordinates: -40.58226, -13.24772 (WGS84)
Relative position OCCURRENCE IS ABOUT 34 KM NNW OF MARACAS.

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
Copper Primary
Vermiculite Primary

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Chrysocolla Ore
Covellite Ore
Vermiculite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite
  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite

Nearby scientific data

(1) -40.58226, -13.24772
ListMap

Economic information

Controls for ore emplacement

  • Magmatic Segregation, Shear Zones

Comments on the geologic information

  • THE PYROXENITE SHOWS LITTLE MINERAL SEGREGATION OF OLIVINE, HYPERSTHENE, AND OLIVINE EXCEPT FOR 8 THIN HORNBLENDITE LAYERS. THE LAYERS COMMONLY STRIKE N15-40W AND DIP 45 DEGREES NORTHEAST.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Both
Significant No

Comments on the workings information

  • SEVERAL PROSPECT PITS ARE LOCATED ALONG MINERALIZED ZONES OF PARTIALLY OXIDIZED COPPER MINERALS AND VERMICULITE.

Reference information

Bibliographic references

  • Deposit

    MONTHLY REPORT, BRAZIL PROJECT, FEB. 1969, HEDLUND, D.C.

  • Deposit

    MONTHLY REPORT, BRAZIL PROJECT, MAY, 1969, HEDLUND, D.C.

  • Deposit

    HEDLUND, D.C., 1989, THE GEOLOGY AND MINERAL RESOURCES OF EAST-CENTRAL BAHIA: U.S. GEOLOGICAL SURVEY, UNPUBLISHED REPORT, 75 P.

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit THIS RECORD CONTAINS INFORMATION FROM MRDS RECORD NO. W002355 WHICH WAS A DUPLICATE RECORD FOR THIS SITE AND HAS BEEN DELETED FROM MRDS.
Deposit COPPER AND VERMICULITE OCCUR IN A LENS-SHAPED PYROXENITE INTRUSION THAT MEASURES 1.4 BY 0.7 KM. SMALL VEINLETS OF COPPER ARE FORMED CHIEFLY OF BORNITE WITH TAPERED LAMELLAR INTERGROWTHS OF CHALCOPYRITE; THE BORNITE IS PARTIALLY REPLACED BY COVELLITE AND IS CUT BY NUMBEROUS VEINLETS OF CHRYSOCOLLA. THE COPPER VEINLETS ARE VERY THIN (< 1 CM THICK) FRACTURE FILLINGS IN THE MULTIPLE-OXIDE SEGREGATIONS WITHIN THE PYROXENITE. VERMICULITE OCCURS ALONG SHEAR ZONES IN THE PYROXENITE AND MOST DEPOSITS ARE LESS THAN A FEW METERS ACROSS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1974 Warfle, Thomas M. U.S. Geological Survey
Updater 01-MAR-1991 Orris, Greta 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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