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Trombetas -Saraca

Producer in Para, Brazil with commodity Aluminum
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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. Ownership information
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10085112
MRDS ID W700643
Record type Site
Current site name Trombetas -Saraca
Alternate or previous names Includes: Saraca Iv, I, Ii, Iii, V, And Sadepa Listed E. To W., Saramenha Trench

Geographic coordinates

Geographic coordinates: -56.44983, -1.67082 (WGS84)
Elevation 155
Location accuracy 5000(meters)
Relative position 450 KM E OF MANAUS, 850 KM W OF BELEM, 27 KM S OF PORTO TROMBETAS

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

  • CENTRAL POINT IN SARACA IV

Commodities

Commodity Importance
Aluminum Critical Primary

Materials information

Materials Type of material
Bauxite Ore
Boehmite Ore
Gibbsite Ore
Anatase Gangue
Hematite Gangue
Ilmenite Gangue
Kaolinite Gangue
Monazite Gangue
Quartz Gangue
Rutile Gangue
Tourmaline Gangue
Zircon Gangue

Analytical data

Result GRUBB (1979) GIVES MINERALOGICAL PROFILES THROUGH THE SARAMENHA TRENCH. IN SITU: 45-43% AL2O3, 6-15% SIO2, 6-20% FE2O3
Result BENEFICATION YEILD: 50-80%

Mineral occurrence model information

Model code 111
USGS model code 38b
Deposit model name Bauxite, laterite type

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Barreiras Group
    Rock description Barreiras Series;Barreiras Series

Nearby scientific data

(1) -56.44983, -1.67082
ListMap

Economic information

Ore body information

  • Thickness 6M

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1966
Discoverer Alcan
Year of first production 1979

Ownership information

  • Type Operator
    Owner Alcan/Mrn (Mineracao Rio Do Norte Sn)
    First year 1974

Comments on the reserve resource information

  • ORE FROM THIS LOCALITY PLUS FROM IGARAPE-SAPACUA; MEASURED RESERVE. ORE 1974 IN RESERVE.

Comments on development

  • ORE PRODUCTION CAPACITY GREATER THAN 3,000,000 TONNES/YEAR. IN 1987, SARACA IV AND AREA NORTH WERE IN PRODUCTION. AFTER ALCAN DISCOVERY, MINERACAO RIO DE NORTE AND ALCOA/BILLITON DEMONSTRATED 1 BILLION TONS OF RESOURCES. IN 1974, MRN WAS CONSTITUTED CVRD (46%), ALCAN (24%), CBA (10%), BILLTON (5%), REYNOLDS (5%), AND NORKS HYDRO (5%). PROJECT TROMBETAS INITIATED IN 1976 AT COST OF 430 MILLION DOLLARS. MINERAL PRODUCED IN 1979 (AUG.) BY ALCAN.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit THICKNESS RANGES FROM 2-6 M. TOP BAUXITE SURFACE IS 120-170 M ABOVE SEA LEVEL, SLIGHTLY ROLLING SURFACE WITH 8-10 M OF COVER (PLIOCENE-PLEISTOCENE) BARREIRAS KAOLINITIC SEDIMENTS OF HIGH POROSITY WITH SOIL FORMED AT TOP FEW M. BAUXITE CHANGES INTO KAOLINITIC UNDERCLAY WHICH CAN BE UP TO 50 M THICK DEPENDING ON BEDDING IN BARREIRAS SEDIMENTS. ALEVA (1981) GIVES BAUXITE PROFILE DESCRIPTION.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-89 Beougher, Dee (Spanski, Gregory T.) U.S. Geological Survey
Updater 01-NOV-93 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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