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  3. Mineral Resource Data System (MRDS)

Onca

Occurrence in Para, Brazil with commodities Nickel, Iron, Cobalt
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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. Economic information about the deposit and operations
  11. Ownership information
  12. Reserves and resources
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10065479
MRDS ID TC40811
Record type Site
Current site name Onca
Alternate or previous names Onca Complex

Geographic coordinates

Geographic coordinates: -51.09915, -6.52751 (WGS84)
Location accuracy 2000(meters)
Relative position ABOUT 23 KM EAST OF SAO FELIX DO XINGU.

Site location context

Political divisions (FIPS codes)

Para(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Para

Comments on the location information

  • IN HEADWATERS OF RIO CARAPANA, 15 KM SW OF PUNA COMPLEX.

Commodities

Commodity Importance
Nickel Critical Primary
Iron Primary
Cobalt Critical Secondary

Materials information

Materials Type of material
Chlorite Ore
Garnierite Ore
Serpentine Ore
Vermiculite Ore
Goethite Gangue
Hematite Gangue
Quartz Gangue
Spinel Gangue

Mineral occurrence model information

Model code 110
USGS model code 38a
Deposit model name Lateritic Ni

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Anorthosite
    Stratigraphic age (youngest) Holocene
  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite
    Rock unit name Onca Mafic-Ultramafic Complex, Xingu Complex;Onca Mafic-Ultramafic Complex, Xingu Complex
    Rock description Onca Mafic-Ultramafic Complex, Xingu Complex;Onca Mafic-Ultramafic Complex, Xingu Complex
  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock

Nearby scientific data

(1) -51.09915, -6.52751
ListMap

Economic information

Comments on the geologic information

  • THE ONCA MAFIC-ULTRAMAFIC COMPLEX EXTENDS ABOUT 22 KM IN AN E-W DIRECTION, IS 3 KM WIDE AND DIPS GENTLY SOUTHWARD. ITS BASAL UNIT ON THE NORTH SIDE IS SERPENTINIZED DUNITE (1300 M), PYROXENITE, FELDSPATHIC PYROXENITE, ANORTHOSITE, AND GABBRO FORM THE TOP TO THE SOUTH.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No
Discovery year 1973

Ownership information

  • Type Operator
    Owner Mineracao Serras Do Sul Ltd. (Minerasul) .
    First year 1973
    Last year 1978

Reserves and resources

  • Type In-situ
    Estimate year 1986
    Total resources 296000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 2.07 wt-pct Nickel Major 1986
    Iron Fe 16.9 wt-pct Iron Major 1986
    Cobalt Co 0.073 wt-pct Cobalt Minor 1986

Comments on the reserve resource information

  • ORE (1) MEASURED; ORE (2) INDICATED; ORE (3) INFERRED; ORE (4) TOTAL RESERVE.

Reference information

Bibliographic references

  • Deposit

    HEIM, S.L., AND DE CASTRO FILHO, L.W., 1986, JAZIDA DE NIQUEL LATERITICO DE PUMA-ONCA, MUNICIPIO DE SAO FELIX DO XINGU, PARA, IN PRINCIPAIS DEPOSITOS MINERAIS DO BRASIL, EDS. C. SCHOBBENHAUS AND C.E.S. COELHO: MINISTERIO DAS MINAS E ENERGIA, BRASILIA, V. 11, P. 347-368

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit CONTAINS LIMONITE SAPROLITE AND SAPROLITE WITH NI GREATER THAN 1% AND OCCURS ON FLATS, DEPRESSIONS AND HILL SLOPES WITH THICKNESS OF 2.5-6.6 M IN AREAS OF 17000-1250000 SQUARE METERS.

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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