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Limoeira Trendferbasa

Plant 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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Ownership information
  12. Production statistics
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10230913
MAS/MILS ID 3510090022
Record type Site
Current site name Limoeira Trendferbasa
Alternate or previous names Limoeira Campo Formoso

Geographic coordinates

Point of reference Claim
Geographic coordinates: -40.22393, -10.49785 (WGS84)
Elevation 500
Location accuracy 1000(meters)

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
Antigorite Unknown
Chromite Unknown
Serpentine Unknown
Talc Unknown

Nearby scientific data

Claim (1) -40.22393, -10.49785
ListMap

Economic information

Ore body information

  • Strike N90E
    Dip 28S
    Thickness 3M
    Length 4000M
    Width 106M
    Depth to top 25M
    Field Value
    MAS Matrix # 1
    MAS Column # 2
    Type of Orebody #1 OTHER
    Shape of Orebody #1 LENTICULAR
    Shape of Orebody #2 TABULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 OTHER
    Strike And Dip N90E:28S
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 3.5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830712
  • Area 1000HA
    Field Value
    Total Surface Area (HA) 1000
    Date of Last Modification 910418

Comments on the geologic information

  • CHROMITE DEPOSITS CAN BE TRACED FOR 8 KM, BUT THEY ARE BRO- KEN INTO 3 SEGMENTS BY MAJOR FAULTS.

Economic information about the deposit and operations

Operation type Surface
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1972
Mining method Bench (Berm)
Year of first production 1976
Plant type Beneficiation (Mill)
Milling method Gravity

Mining district

District name Campo Formoso District

Ownership information

  • Type Owner-Operator
    Owner Companhia De Mineracao Serra De Jacobina (Serjana)
    Interest 100
    Home office Brazil
    Year 1981
    First year 1981

Comments on the ownership information

  • SERJANA IS A JOINT VENTURE BETWEEN A BRAZILIAN GROUP, FERBASA AND BRAZILIAN CHROME RESOURCES DEVELOPMENT COMPANY (BCRD) A JAPANESE CONSORTIUM. DISTRIBUTION OF OWNERSHIP IS AS FOLLOWS: FERBASA-46%; CHROMITA DO BRAZIL S.A.-5%; BCRD- 48%; SUMITOMO SHOSI-0.5%; AND MITSUI-0.5%.

Production statistics

  • Year 1977
    Description Chromite Output; Conc. Out 30%, Input Was 11.5% 385000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Chromium Chromium 385000mt 30wt-pct
  • Year 1979
    Description 350000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Chromium Chromium 350000mt
  • Year 1980
    Description 350000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Chromium Chromium 350000mt
  • Year 1989
    Accuracy Estimate
    Description Evaluation Estimate 90000 Mt Cons/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Chromium Chromium 90000mt

Comments on the production information

  • LUMP ORE AND GRAINS PRODUCTS=PA, CONCENTRATES=PB.

Comments on the reserve resource information

  • Q-MAT 1 TONNAGE IS ESTIMATED SURFACE MINEABLE TONNAGE TO A VERTICAL DEPTH OF 50 METERS ALONG THE ENTIRE 4 KM LIMOEIRA TREND. OVERALL STRIP RATIO FOR THIS TONNAGE WOULD BE ABOUT 11:1 WASTE TO ORE. THERE IS AN ADDITIONAL TONNAGE OF ORE THAT COULD BE MINED BY UNDERGROUND METHODS BUT UNKNOWNS HAVE PREVENTED SUCH AN ESTIMATE BEING MADE. M1C2 = M9C4. INSITU TONNAGE AS OF 1/89. SURFACE MINEABLE TO VERT.DEPTH OF 50 M AT 15/1 WASTE TO ORE RATIO. MINING RECOVERY=100 %. 310,000 MTPY ROM AT 17.0 %CR2O3 FOR: 21,600 MTPY LUMP & GRAINS AT 40-41 %CR2O3 AND 68,400 MTPY CONCS. AT 46.0 %CR2O3.

Workings at the site

  • Type of workings Surface
    Area 1000HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method BENCH (BERM)
    Percent Waste Rock 91.6
    Avg. Overburden Thickness 5
    Primary Material Cover SAND, GRAVEL
    Percentage 100
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 10
    Max. Pit Slope (degrees) 38
    Capacity 1033
    Capacity Units MT ORE/DAY
    Unit Production Cost 21.04
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 2
    Year of Information 1981

Reference information

Bibliographic references

  • Deposit

    1978 FERRO ALLOY MANUAL, THE TEX REPORT LTD., TOKYO 1978,

  • Deposit

    P. 114.

  • Deposit

    "CHROME MINES IN BRAZIL." THE TEX REPORT.1978. PP.114-118.

  • Deposit

    HEDLUND, DAVID, ET AL. "STRATIFORM CHROMITE AT CAMPO FORMOSO

  • Deposit

    BAHIA, BRAZIL." JOURNAL OF RESEARCH OF THE UNITED

  • Deposit

    STATES GEOLOGICAL SURVEY. SEPTEMBER-OCTOBER 1974. VOL.

  • Deposit

    NO.5.

  • Deposit

    ROSKILL INFORMATION SERVICES LILMITED. "THE ECONOMICS OF

  • Deposit

    CHROMIUM." 3RD EDITION. LONDON. 1978. PP.54-62.

  • Deposit

    PERSONAL COMMUNICATION, PRIVATE CONSULTANT IN BRAZIL, 1981.

General comments

Subject category Comment text
Deposit CRUDE ORE RESERVES TOTAL SOME 4 MILLION S.T., WHICH IS 1,150,000 S.T. IN TERMS OF CONCENTRATES. THIS SHOULD ALLOW A MINE LIFE OF 10 YEARS AT AN ANNUAL PRODUCTION RATE OF 100,000 S.T. OF CONCENTRATES PER YEAR. THE CONCENTRATION PLANT WAS COMPLETED IN AUGUST 1976 AND STARTED FULL SCALE PRODUCTION IN DECEMBER 1976. TO INCREASE ACTUAL RECOVERY, GRAVITY CONCENTRATION EQUIPMENT WAS INTRODUCED. PRODUCTION COST WAS $65-$66 BY END OF 1976 AMOUNT OF THE LOAN FOR THE PROSPECTING AND DEVELOPMENT OF THE MINE WAS $7,023,000 ($1,873,000 FOR EXPLORATION AND $5,150.000 FOR DEVELOPMENT AND CAPITAL COSTS.) CRUDE ORE MINED IN 1977 TOTALLED 355,000 S.T. THE ORE BODY IS ALTERED BY SERPEUTINIZATION.

Reporter information

Type Date Name Affiliation Comment
Reporter 29-AUG-1995 Eastern Field Operations Center (EFOC) U.S. Bureau of Mines

Beyond USGS

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

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