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Mina De Medrado

Producer in Bahia, Brazil with commodity Chromium
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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. Geologic structures
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Production statistics
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10061764
MRDS ID TC34720
Record type Site
Current site name Mina De Medrado
Alternate or previous names Medrado

Geographic coordinates

Geographic coordinates: -39.74725, -10.32063 (WGS84)
Location accuracy 5000(meters)
Relative position ABOUT 49 KM ENE OF SENHOR DO BONFIM.

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
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore
Magnetite Gangue
Olivine Gangue
Pyroxene Gangue
Serpentine Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Serpentinite
    Stratigraphic age (youngest) Neoarchean
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Harzburgite
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -39.74725, -10.32063
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Synform

Ore body information

  • General form LENS, LAYERS
    Strike NNE
    Dip 70E
    Thickness 15M
    Length 500M

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1971
Discoverer Torquato Ribeiro Dos Santos
Year of first production 1973

Production statistics

  • Year 1981
    Period 1973-1981
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^38-46% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Cr2O3 Chromium Chromium 42wt-pct

Comments on the production information

  • INCLUDES 237,699 MT OF LUMP AT 38% CR2O3, 76,080 MT OF CONCENTRATE AT 38% CR2O3 AND 35,278 TONS OF 46% REFINED CONCENTRATE.

Comments on the reserve resource information

  • ORE (1), MEASURED BETWEEN 35-50 M; ORE (2), INDICATED BETWEEN 50-75 M; ORE (3), GEOLOGICAL RESERVE; ORE (4), MEASURED IN EAST AND WEST BLOCK BETWEEN 25-50 M; ORE (6), MEASURED BETWEEN 30-60 M; ORE (7), INDICATED BETWEEN 25-50 M; ORE (8), TOTAL MEASURED AND INDICATED.
  • TOTAL RESERVE, INCLUDES MINAS IPUEIRA

Comments on the workings information

  • OPEN PIT 1973-1975, UNDERGROUND 1976- .

Comments on development

  • IN 1971 AND FOLLOWING, DEPARTAMENTO NACIONAL DA PRODUCAO MINERAL (DNPM) COMPLETED 1819 M OF DIAMOND DRILLING IN 30 HOLES RANGING IN DEPTH FROM 11 TO 140 M. IN 1977, PUT IN ADIT WITH 980 M LENGTH.

Reference information

Bibliographic references

  • 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.

  • Deposit

    DE M.P. MELLO, C.H., DURAO, G., VIANA, J.D.S., AND CARVALHO, C.J.C., 1986, DEPOSITOS DE CROMITA DAS FAZENDA MEDRADO E IPUEIRA, MUNICIPIO DE SENHOR DO BONFIM, BAHIA IN PRINCIPAIS DEPOSITOS MINERAIS DO BRASIL, EDS. SCHOBBENHAUS, C., AND COELHO, C.E.S., V. II, P. 213-234.

  • Other Database

    CIMRI

  • Production

    CE M.P. MELLO AND OTHERS (1986).

  • Reserve-Resource

    DE M.P. MELLO AND OTHERS (1986).

General comments

Subject category Comment text
Deposit LENGTH IS AGGREGATE OF BOTH LIMBS; NORMAL THICKNESS 5-8 M; APPEARS TO BE TWO LAYERS, HIGHLY FAULTED AND OFFSET AT DEPTH, DRILLING SHOWS CHROMITE TO 180 M, 80% OF ORE IS LUMP ORE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1992 Page, Norman J. U.S. Geological Survey
Updater 01-MAR-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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