1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Coomacka

Past Producer in Guyana 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. Nearby scientific data
  7. Economic information about the deposit and operations
  8. Mineral rights holdings
  9. Ownership information
  10. Production statistics
  11. Workings at the site
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10182468
MAS/MILS ID 3120000020
Record type Site
Current site name Coomacka

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -58.266, 5.96797 (WGS84)
Location accuracy 5000(meters)

Site location context

Political divisions (FIPS codes)

Guyana(country)

South America(continent)

Land(continent)

Geographic areas

Country
Guyana

Commodities

Commodity Importance
Aluminum Critical Primary

Nearby scientific data

Ore Body (1) -58.266, 5.96797
ListMap

Economic information

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Metallic
Significant No

Mineral rights holdings

Type of mineral rights Other

Ownership information

  • Type Owner
    Owner Guyana Government
    Interest 100
    Home office Guyana
    Year 1981
  • Type Operator
    Owner Guyana Mining Enterprises, Ltd. (Guymine)
    Home office Guyana
    Year 1981

Production statistics

  • Year 1965
    Description 300000000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 3000000mt
  • Year 1966
    Description 300000000 Mt Ore/Yr
  • Year 1967
    Description 300000000 Mt Ore/Yr
  • Year 1968
    Description 300000000 Mt Ore/Yr
  • Year 1969
    Description 300000000 Mt Ore/Yr
  • Year 1970
    Description 347000000 Mt Ore/Yr
  • Year 1971
    Description 334000000 Mt Ore/Yr
  • Year 1972
    Description 290000000 Mt Ore/Yr
  • Year 1973
    Description 287000000 Mt Ore/Yr
  • Year 1974
    Description 293000000 Mt Ore/Yr
  • Year 1975
    Description 218000000 Mt Ore/Yr
  • Year 1976
    Description 181000000 Mt Ore/Yr
  • Year 1977
    Description 192000000 Mt Ore/Yr
  • Year 1978
    Description 196000000 Mt Ore/Yr
  • Year 1979
    Description 193000000 Mt Ore/Yr

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 OPEN PIT
    Capacity 650
    Capacity Units MT ORE/DAY
    Unit Production Cost 5.2
    Units of Production $/MT ORE
    Operating Days per Year 300
    Year of Information 1981
  • Type of workings Surface
    Area 1000HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Capacity 1000
    Capacity Units MT ORE/DAY
    Unit Production Cost 5.2
    Units of Production $/MT ORE
    Operating Days per Year 300
    Year of Information 1981

Comments on other economic factors

  • TRAINS FROM SEVERAL MINES CONVERGE AT AN ORE GRADING STOCKYARD. BAUXITE IS SIDE DUMPED INTO HAMMERMILLS AND REDUCED TO 85% MINUS 90 MM. ORE IS WASHED. IMPURITIES FROM CALCINE AND METAL GRADE FEEDS PASS THROUGH SCREEN AND ARE SENT TO FINES RECOVERY PLANT, TREATED IN HYDROCYCLONES AND MECHANICAL CLASSIFIERS TO SEPARATE ALUMINA FROM SILICA IMPURITIES. ALUMINA THEN TREATED IN FLOTATION CELLS. TO PRODUCE CALCINED REFRACTORY GRADE BAUXITE, OVERSIZE FROM THE WASHING SCREEN IS CRUSHED TO 40 MM, WASHED AGAIN AND SENT TO ROTARY KILNS TO REMOVE WATER. WHEN WASHING METAL GRADE ORE, OVERSIZE FROM SCREENS IS SENT 3.2 KM TO DRYING PLANT (ROTARY KILNS). AFTER DRYING OR CALCINING THE BAUXITE CAN BE EXPORTED. ALL MATERIAL FROM FINES PLANT AND SOME OF METAL GRADE BAUXITE IS SENT TO ALUMINA REFINERY. FEED FOR LINDEN REFINERY IS 75% ALUMINA CONCENTRATE FROM FINES PLANT, 15% IRON LATERITE, AND REMAINDER IS METAL GRADE BAUXITE DRIED AT BAUXITE PLANT. A SMELTER FOR GUYANA IS IN PLANNING STAGES. DEVELOPMENT DEPENDS UPON CONSTRUCTION OF HYDROELECTRIC POWER PLANT.

Reference information

Bibliographic references

  • Deposit

    CORRESPONDENCE: GUYANA BAUXITE CO.,LTD., NOV.11,1975 (SEE GU

  • Deposit

    FILE).

  • Deposit

    GUYANA BAUXITE CO. MAP.

  • Deposit

    GEOLOGICAL SURVEY OF GUYANA MAP: BAUXITE DEPOSITS AT LINDEN AND I

  • Deposit

    GEOLOGICAL SURVEY OF BRITISH GUIANA MAP:PART OF N.E. BRITISH GUIA

General comments

Subject category Comment text
Deposit 300 OPERATING DAYS PER YEAR IS ASSUMED. THE MODIFIER OF COMMODITY RECORD 2 IS LISTED AS "OTHER". READ THIS AS METALLURGICAL GRADE ALUMINA.

Reporter information

Type Date Name Affiliation Comment
Reporter 26-SEP-96 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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