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Usamu Utsumi Mine

Producer in Minas Gerais, Brazil with commodities Uranium, Molybdenum, Zirconium
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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. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10066544
MRDS ID TC42777
Record type Site
Current site name Usamu Utsumi Mine
Alternate or previous names Cercado and Agostinho Deposits, Planalto De Pocos De Caldas

Geographic coordinates

Geographic coordinates: -46.4826, -21.94773 (WGS84)
Location accuracy 1000(meters)
Relative position CERCADO IS 25 KM SOUTH OF POCOS DE CALDAS; AGOSTINHO IS 13 KM SE OF POCOS DE CALDAS.

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

  • LAT/LONG FOR CENTRAL POINT OF CERCADO; AGOSTINHO IS 21-55 S AND 46-34 W.

Commodities

Commodity Importance
Uranium Primary
Molybdenum Secondary
Zirconium Critical Secondary

Materials information

Materials Type of material
Coffinite Ore
Galena Ore
Ilsemannite Ore
Jordisite Ore
Molybdenite Ore
Pyrite Ore
Sphalerite Ore
Uraninite Ore
Zircon Ore
Fluorite Gangue

Alteration

  • (Local) Potassic, Oxidation

Mineral occurrence model information

Model code 155
USGS model code 25f
Deposit model name Volcanogenic U

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Alkalic Intrusive Rock > Nepheline Syenite
    Rock unit name Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex
    Rock description Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex;Pocos De Caldas Alkaline Complex

Nearby scientific data

(1) -46.4826, -21.94773
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Economic information

Geologic structures

Type of structure Local
Structure description Pocos De Caldas Alkaline Ring Complex

Ore body information

  • Name CERCADO A
    General form LENSES
    Dip }}}
    Thickness 15M
    Length 900M
    Width 150M
  • Name CERCADO B
    General form LENSES
    Dip }}}
    Thickness 370M
    Length 1400M
    Width 440M
  • Name CERCADO E
    General form LENSES
    Dip }}}
    Thickness 140M
    Length 1100M
    Width 500M
  • Name AGOSTINHO
    General form LENSES
    Dip }}}

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1952
Discoverer Usgs And Dnpm
Year of first production 1982

Mining district

District name Pocos De Caldas

Ownership information

  • Type Operator
    Owner Nuclebras And Uranium Pechiney Ugine Kulman

Comments on the production information

  • 2500 MT OF ORE PER DAY (1985); U3O8 PRODUCTION ABOUT 1.5 MT PER DAY FOR CAPACITY OF 550 MT U3O8 PER YEAR.

Comments on the reserve resource information

  • U3O8 (1), MOO2, AND ZRO3 FROM CERCADO; U3O8 (2) FROM AGOSTINHO.
  • WRIGHT AND PITTMAN (1979) ESTIMATED RESERVES EQUAL TO PRODUCTION OF 600 ST OF U3O8 PER YEAR FOR 10-12 YEARS WITH A GRADE OF 0.08-0.12% U3O8.

Comments on the workings information

  • OPEN-PIT, 800 M IN DIAMETER. BLOCK CAVING IN CERCADO BODY.

Reference information

Bibliographic references

  • Deposit

    FRAENKEL, M.O., DOS SANTOS, R.C., DE V. LAPIDO LOUREIRO, F.E., AND DE SENNA MUNIZ, W., 1985, JAZIDA DE URANIO NO PLANALTO DE POCOS DE CALDAS, MINAS GERAIS, IN PRINCIPAIS DEPOSITOS MINERAIS DO BRASIL, EDS., SCHOBENHAUS, C., AND SILVA COELHO, C.E.: DEPARTAMENTO NACIONAL DA PRODUCAO MINERAL, V. I, P. 89-103.

  • Deposit

    MINING MAGAZINE, 1982, V. 146, NO. 3 (MARCH), P. 190-191.

  • Deposit

    U.S. GEOLOGICAL SURVEY BULLETIN 1693, P. 162-163.

  • Deposit

    WRIGHT AND PITTMAN, 1979, NURE REPORT GJO-103 (79), P. 109-125.

  • Other Database

    CIMRI

  • Production

    FRAENKEL AND OTHERS (1985).

  • Reserve-Resource

    MINING MAGAZINE (1982); WRIGHT AND PITTMAN (1979).

General comments

Subject category Comment text
Deposit CERCADO A: STRIKE IS DIRECTION OF MAJOR AXIS, N60E IS DIRECTION OF WIDTH. CONSISTS OF SECONDARY MINERALIZATION WITH PRIMARY MINERALIZATION IN BRECCIAS. CERCADO B: STRIKE IS DIRECTION OF MAJOR AXIS, WIDTH IS MINOR AXIS IN DIRECTION N48W OF A CONE OF SECONDARY MINERALIZATION IN PYROCLASTICS; PRIMARY MINERALIZATION IS IN TRAPS OF PYROCLASTICS. CERCADO E: STRIKE IS DIRECTION OF MAJOR AXIS, WIDTH IS MINOR AXIS WITH DIRECTION N35W OF A CONE. AGOSTINHO: STRIKE IS LONG AXIS OF BRECCIA, N10W IS MINOR AXIS; 2 ORE BODIES DIVIDED BY FAULT.
Deposit RECORD ENTERED BY LEONARD WAS W700094 (OSAMU UTSUMI); IT HAS BEEN COMBINED WITH THIS RECORD.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1988 Leonard, Kenneth R. U.S. Geological Survey

Beyond USGS

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

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