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Pedra Verde

Plant in Ceara, Brazil with commodity Copper
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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. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10134181
MAS/MILS ID 3510110001
Record type Site
Current site name Pedra Verde
Alternate or previous names Pedra Verde Vicosa, Vicosa Do Ceara

Geographic coordinates

Point of reference Claim
Geographic coordinates: -41.08226, -3.41492 (WGS84)
Elevation 600
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Ceara(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Ceara

Comments on the location information

  • DEPOSIT LOCATED ON W. SLOPE OF UBARI RIVER VALLEY, ABOUT 275 KM WNW OF FORTALEZA AND 65 KM SSW OF CAMOCIM. AT LAST REPORT PROJECT WAS POSTPONED AWAITING FINANCING.

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcocite Unknown
Chalcopyrite Unknown
Pyrite Unknown

Nearby scientific data

Claim (1) -41.08226, -3.41492
ListMap

Economic information

Ore body information

  • Strike N40E
    Dip 75W
    Thickness 5M
    Length 1000M
    Width 600M
    Area 200HA
    Depth to top 19M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SHEAR ZONE
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 PROPYLITIC
    Strike And Dip N40E:75W
    Minimum Depth to Top 18
    Total Surface Area (HA) 200
    Date of Last Modification 810319

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Significant No
Discovery year 1863
Mining method Open Stope - Other Open Stope Methods
Year of first production 1982
Plant type Beneficiation (Mill)
Plant subcategory Flotation
Milling method Flotation

Mining district

District name Vicosa

Mineral rights holdings

Type of mineral rights Private Lease

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Promisa (Subs. Of Brascan Ltd. Of Canada).
    Interest 24
    Home office Brazil
    Year 1986
  • Type Owner
    Owner Caraiba Metais (Subsid. Of Fibase, Government Bank).
    Interest 76
    Home office Brazil
    Year 1986
  • Type Operator
    Owner Companhia Minera Sul Vicosa
    Home office Brazil
    Year 1986

Reserves and resources

  • Type In-situ
    Estimate year 1986
    Measured 6952000mt ore
    Indicated 8325000mt ore
    Demonstrated 15277000mt ore
    Total resources 15277000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 1.1 wt-pct Copper Major 1986
  • Type In-situ
    Estimate year 1987
    Measured 6917000mt ore
    Indicated 8325000mt ore
    Demonstrated 15242000mt ore
    Total resources 15242000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.98 wt-pct Copper Major 1987

Comments on the reserve resource information

  • THERE IS ECONOMIC GOLD MINERALIZATION PRESENT, BUT NO GRADE GIVEN.
  • ANUARIO MINERAL BRASILEIRO 1988, P179.

Workings at the site

  • Type of workings Underground
    Length 2000M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OTHER OPEN STOPE METHODS
    Percent Waste Rock 0
    Percent Recovery 85
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Avg. Length of Adits (m) 450
    Number of Adits 2
    1st Condition of Workings OPEN
    Capacity 2885
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Operating Days per Year 312
    Operating Shifts per Day 2
    Year of Information 1980
  • Type of workings Underground
    Length 3520M
    Overall depth 350M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method OTHER OPEN STOPE METHODS
    Percent Waste Rock 0
    Percent Recovery 85
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 2
    1st Condition of Workings OPEN
    Capacity 2885
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Operating Days per Year 312
    Operating Shifts per Day 2
    Year of Information 1980

Reference information

Bibliographic references

  • Reserve-Resource

    ANUARIO MINERAL BRASILEIRO, 1987, P 179.

  • Reserve-Resource

    ANUARIO MINERAL BRASILEIRO, 1988, P 179.

  • Deposit

    AUGUST 13, 1975: LEONARDOS O.H.,1956, COBRE NO BRASIL NO EST

  • Deposit

    RO: D.N.P.M., DIV. FOM. PROD. MIN., AVULSO NO. 79, P. 20.

  • Deposit

    PROD. MIN., BOL. NO. 90, PP. 43-56

  • Deposit

    RELATORIO DA DIRECTORIA, 1949, COBRE: CEARA: D.N.P.M., DIV.

  • Deposit

    GOLDER ASSOCIATES REPORT, MARCH 1980.

  • Deposit

    UNPUBLISHED REPORT, 1981.

  • Deposit

    ONE MAP, M-28, SCALE 1:1,000,000.

  • Deposit

    ERICHSEN, A., RELATORIO DA DIRECTORIA: MINISTEIRIO DAS MINAS

  • Deposit

    E ENERGIA, 1949, P.43-54.

  • Deposit

    MINING JOURNAL, 6/29/84, P. 436.

  • Deposit

    MINING JOURNAL, 12/9/83, P. 421.

Reporter information

Type Date Name Affiliation Comment
Reporter 06-JAN-95 Porter, Kenneth E. 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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