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Borges

Past Producer in Minas Gerais, Brazil with commodity Mica
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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. Ownership information
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10065548
MRDS ID TC40895
Record type Site
Current site name Borges
Alternate or previous names Japanese Sao Roque

Geographic coordinates

Geographic coordinates: -41.93891, -20.69579 (WGS84)
Elevation 845
Location accuracy 1000(meters)
Relative position ABOUT 200 KM NNE OF RIO DE JANEIRO.

Site location context

Political divisions (FIPS codes)

Minas Gerais(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Minas Gerais

Comments on the location information

  • 4 KM BY ROAD FROM CAIANA.

Commodities

Commodity Importance
Mica Primary

Materials information

Materials Type of material
Muscovite Ore
Biotite Gangue
Garnet Gangue
Kaolin Gangue
Microcline Gangue
Plagioclase Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Gneiss
    Stratigraphic age (youngest) Neoarchean
    Stratigraphic age (youngest) Neoarchean
  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite

Nearby scientific data

(1) -41.93891, -20.69579
ListMap

Economic information

Ore body information

  • General form TABULAR
    Strike NNE
    Dip STEEP NW
    Plunge S
    Thickness 1M
    Length 350M
    Width 50M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Significant No
Discovery year 1918
Discoverer Antonio Borges Pereira

Ownership information

  • Type Owner
    Owner Antonio Borges Pereira
    First year 1918
    Last year 1943
  • Type Owner-Operator
    Owner Pedro And Francisco De Oliveria
    First year 1943
  • Type Operator
    Owner Pereira And Lessees
    First year 1918
    Last year 1936
  • Type Operator
    Owner Empresa Brasileira De Mineracao Ltd (Japanese Co.)
    First year 1918
    Last year 1936

Comments on the production information

  • ORE (1) AND (2) ARE MINE CRUDE MICA; ORE (3) PEGMATITE REMOVED WITH 8.1 STRIPPING RATIO OF OVERBURDEN TO ORE; 500 KG AND UP PRODUCED IN 1944.

Comments on the reserve resource information

  • ORE (1) MEASURED; ORE (2) INDICATED OF MINE-CRUDE MICA.

Comments on the workings information

  • PRE-1943 MAZE OF IRREGULAR INTERCONNECTED DRIFTS, INCLINES, ROOMS AND RAISES IN SOFT DECOMPOSED ROCK; POST-1943 OPEN PIT AND UNDERGROUND IN HARD ROCK.

Reference information

Bibliographic references

  • Deposit

    PECORA, W.T., KLEPPER, M.R., LARRABEE, D.M., BARBOSA, A.L.M., AND FRAYHA, RESK, 1950, MICA DEPOSITS IN MINAS GERAIS, BRAZIL: U.S. GEOLOGICAL SURVEY BULLETIN 964-C, P. 205-305.

  • Deposit

    KLEPPER, M.R., AND LARRABEE, D.M., 1944, BORGES (JAPANESE, SAO ROQUE) MICA MINAS ESPERA FELIZ-CAIRIA DISTRICT, MUNICIPIO OF ESPERA FELIZ, MINAS GERAIS, BRAZIL: U.S. GEOLOGICAL SURVEY UNPUBLISHED REPORT, 15 P.

  • Other Database

    CIMRI

  • Production

    KLEPPER AND LARRABEE (1944); PECORA ET AL (1950).

General comments

Subject category Comment text
Deposit MICA SHOOT IN N SECTION, IN HANGING WALL OF PEGMATIC BETWEEN GRANITIC PEGMATITE (BORDER ZONE (?)) AND MASSIVE K-FELDSPAR ZONE CONTAINED 150 MT MINE-CRUDE MICA; IRREGULARLY SHAPED PEGMATITE 300-400 M LONG.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-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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