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  3. Mineral Resource Data System (MRDS)

Alvo Antas I and Antas I Norte

Prospect in Bahia, Brazil with commodity Gold
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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. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Reserves and resources
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10097392
MRDS ID TC40826
Record type Site
Current site name Alvo Antas I and Antas I Norte
Alternate or previous names Fazenda Maria Preta

Geographic coordinates

Geographic coordinates: -39.31419, -11.01115 (WGS84)
Location accuracy 5000(meters)
Relative position ABOUT 83 KM NW OF SERRINHA.

Site location context

Political divisions (FIPS codes)

Bahia(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Bahia

Comments on the location information

  • LOCATION FOR CENTER OF ANTAS CONCESSION AREA.

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Pyrrhotite Ore
Graphite Gangue
Quartz Gangue

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic)

Nearby scientific data

(1) -39.31419, -11.01115
ListMap

Economic information

Ore body information

  • Strike N45E
    Dip 50-60SW
    Thickness 2.3M
    Length 250M

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1975
Discoverer Docegeo

Reserves and resources

  • Type In-situ
    Estimate year 1987
    Total resources 116046000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 3.99 g/mt Gold Major 1987
  • Type In-situ
    Estimate year 1987
    Total resources 253000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 6.61 g/mt Gold Major 1987
  • Type In-situ
    Estimate year 1987
    Total resources 17060000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 6.7 g/mt Gold Major 1987

Comments on the reserve resource information

  • ORE (1) OPEN-PIT ORE WITH 2.0 G/MT AU CUTOFF GRADE; ORE (2) RESERVE TO 140 M IN ANTAS I; ORE (3) RESERVE IN ANTAS I NORTE.

Reference information

Bibliographic references

  • Deposit

    GITEW/SUMEN-CVRD, 1988, JAZIDA DE OURO DA FAZENDA MARIA PRETA, SANTA LUZ BAHIA, IN PRINCIPAIS DEPOSITOS MINERAIS DO BRASIL, EDS. C. SCHOBBENHAUS AND C.E.S. COELHO: MINISTERIO DAS MINAS E ENERGIA, BRASILIA, V. III, P. 431-461

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit SIZE FOR ANTAS I, ANTAS I NORTE IS 60 M LONG AND 3.0 M THICK.
Deposit Discovery Year: 1970'S-1980'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-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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