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Fazenda Bonfim Tungsten I

Producer in Rio Grande Do Norte, Brazil with commodity Tungsten
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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. Mineral occurrence model information
  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. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10069067
MRDS ID W002363
Record type Site
Current site name Fazenda Bonfim Tungsten I
Alternate or previous names Bonfim

Geographic coordinates

Geographic coordinates: -36.11555, -5.83141 (WGS84)
Relative position 27 KM SOUTHEAST OF LAGES

Site location context

Political divisions (FIPS codes)

Rio Grande Do Norte(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Rio Grande Do Norte
Brazil Rio Grande Do Norte

Commodities

Commodity Importance
Tungsten Critical Primary

Materials information

Materials Type of material
Scheelite Ore
Epidote Gangue
Garnet Gangue

Mineral occurrence model information

Model code 42
USGS model code 14a
Deposit model name W skarn

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Serido Schist, Biotite Schist
    Rock description Serido Schist, Biotite Schist
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Skarn (Tactite)

Nearby scientific data

(1) -36.11555, -5.83141
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Precambrian Shield

Ore body information

  • General form IRREGULAR MASSES
    Thickness 2M
    Length 700M
    Width 30M

Controls for ore emplacement

  • Country Rock, Serido Schist, Strikes N10e And Dips From 60e To Vertical

Comments on the geologic information

  • ORE BED IS AN ALTERED MARBLE CONTAINING AMPHIBOLE, SOME GARNET AND EPIDOTE. MARBLE IS ASSOCIATED WITH THE ORE BED. THE MARBLE IS PURE WHITE, HAS NO SCHEELITE, AND IS ABOUT 5 M THICK

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1969
Discoverer Sr. Raul'S Son: Sr. Eurico
Year of first production 1969
Production years 1969

Ownership information

  • Type Owner
    Owner Sr. Raul Pereira Da Silva

Comments on the production information

  • SR. RAUL HAS SOLD (AS OF DATE IN SOURCE) 14 TONS OF SCHEELITE CONCENTRATE (GRADE OF ORE IN PLACES EXCEEDS 2% WO3) TO SR. A. BEZERRA AT NCR $9/KG

Comments on the reserve resource information

  • TOTAL RESERVE INCLUDES BOQUERAO.

Comments on the workings information

  • DEPOSIT INITIALLY CONSISTED OF SCHEELITE CRYSTALS AND BOULDERS IN A RESIDUAL SOIL COVER FROM 1-2 M THICK ALONG CRESTS OF 3 LOW RIDGES. ABOUT 400 PITS HAVE BEEN DUG, SOME OF THE PITS ARE NON-PRODUCTIVE, A FEW HAVE 2.5 TONS OF SCHEELITE.

Comments on development

  • THE TUNGSTEN DEPOSIT WAS DISCOVERED WITH A MINERALIGHT (ULTRAVIOLET)

Reference information

Bibliographic references

  • Deposit

    MONTHLY REPORT, BRAZIL PROJECT, APRIL 1969, NAGELL, R.H.

  • Deposit

    CESAR, P. DE A.B., 1984, PRINCIPAIS DEPOSITOS MINERAIS: CONCEITOS, METODOLOGIA, E LISTAGEM, CAPITULO IX, IN GEOLOGIA DO BRASIL, EDS., C. SCHOBBENHAUS, D. DE A. CAMPOS, G.R. DERZE, AND H.E. ASMUS: DEPARTAMENTO NACIONAL DA PRODUCAO MINERAL, PP. 359-419.

  • Other Database

    CIMRI

  • Production

    MONTHLY REPORT, BRAZIL PROJECT, APR 1969, NAGELL

General comments

Subject category Comment text
Deposit THE SCHEELITE IN THE ORE BED IS COARSE GRAINED AND FORMS IRREGULAR MASSES UP TO 10 CM IN DIAMETER. IT IS CLEAR TRANSLUCENT VARIETY, SUPERFICIALLY RESEMBLING QUARTZ, AND IT FLUORESCES BRIGHT BLUE. THE ORE IS CONCENTRATED BY PANNING IN SMALL WATER FILLED HOLES IN THE GROUND.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1974 Warfle, Thomas M. U.S. Geological Survey
Updater 01-AUG-1992 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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