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  3. Mineral Resource Data System (MRDS)

Noroeste

Occurrence in Bahia, Brazil with commodity Magnesite
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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. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Ownership information
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10065516
MRDS ID TC40856
Record type Site
Current site name Noroeste

Geographic coordinates

Geographic coordinates: -41.28505, -14.13186 (WGS84)
Location accuracy 10000(meters)

Site location context

Political divisions (FIPS codes)

Bahia(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Bahia

Comments on the location information

  • WEST SIDE OF SERRA DAS EGUAS

Commodities

Commodity Importance
Magnesite Primary

Comments on the commodity information

  • IN THE DISTRICT, KYANITE, TOURMALINE, TOPAZ, BERYL, PHLOGOPITE IN OPEN FISSURES AND VUGS LINED WITH MAGNESITE CRYSTALS AND QUARTZ. KYANITE, TOURMALINE, PHLOGOPITE, AND DOLOMITE WERE OBSERVED IN COARSE-GRAINED TALC. KYANITE WAS MOST COMMON. BERYLS ARE GREEN AND BLUE. TOPAZ LEAST COMMON.

Materials information

Materials Type of material
Magnesite Ore
Talc Gangue

Analytical data

Result MAGNESITE (2 SAMPLES) 1.43-2.76% SIO2
Result 2.56-5.15% FE2O3, 0.45-0.55% AL2O3, 0.02-0.12% MNO
Result TR-6.82% CAO, 38.51-45.60 % MGO.

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite

Nearby scientific data

(1) -41.28505, -14.13186
ListMap

Economic information

Ore body information

  • Length 160M
    Width 30M
  • Length 40M
    Width 30M
  • Length 30M
    Width 10M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discoverer Pierre Cahen And Georges Minvielle.

Mining district

District name Brumado, Serra Das Eguas

Ownership information

  • Type Owner-Operator
    Owner Magnesita Ltda. . Magnesita S. A. ).
    First year 1939
    Last year 1940

Comments on the production information

  • REPRESENT THE WHOLE DISTRICT. LIMITED EXPOSURES, POOR CHEMICAL GRADE, SUGGESTS AREA MERITS LITTLE CONSIDERATION.

Comments on the reserve resource information

  • REPRESENTS WHOLE DISTRICT; (1) MEASURED RESERVES; (2) TOTAL RESERVE.

Reference information

Bibliographic references

  • Analytical Data

    BODENLOS (1954).

  • Deposit

    BODENLOS, A.J., 1954, MAGNESITE DEPOSITS IN SERRA DAS EGUAS, BRUMADO, BRAZIL: U.S. GEOLOGICAL SURVEY BULLETIN 975-C, 87-170.

  • Deposit

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

  • Other Database

    CIMRI

  • Production

    DE AZEVEDO BRANCO (1984). BODENLOS (1954).

  • Reserve-Resource

    DE AZEVEDO BRANCO (1984).

General comments

Subject category Comment text
Deposit SIZE IS SIZE OF THREE OUTCROPS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1994 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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