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

East Mombacka

Past Producer in Guyana with commodity Aluminum
Map
XML
JSON
KML
B
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. Ownership information
  13. Production statistics
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10255224
MAS/MILS ID 3120000050
Record type Site
Current site name East Mombacka
Alternate or previous names Moraballi

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -58.0101, 5.19491 (WGS84)
Elevation 30
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

Materials information

Materials Type of material
Gibbsite Unknown

Nearby scientific data

Ore Body (1) -58.0101, 5.19491
ListMap

Economic information

Ore body information

  • Thickness 6M
    Depth to top 17M
    Field Value
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 MASSIVE
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin RESIDUAL CONCENT
    Primary Ore Control LITHOLOGY
    Minimum Depth to Top 15
    Avg. Thick. Unconsol. Mat. 17
    Min. Thick. Unconsol. Mat. 15
    Date of Last Modification 830609

Economic information about the deposit and operations

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

Mining district

District name Essequibo District

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 100000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 100000mt
  • Year 1966
    Description 100000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 100000mt
  • Year 1967
    Description 100000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 100000mt
  • Year 1968
    Description 100000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 100000mt
  • Year 1969
    Description 100000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 100000mt
  • Year 1970
    Description 146099 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 146099mt
  • Year 1971
    Description 139799 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 139799mt
  • Year 1972
    Description 121099 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 121099mt
  • Year 1973
    Description 119599 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 119599mt
  • Year 1974
    Description 118299 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 118299mt
  • Year 1975
    Description 84000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 84000mt
  • Year 1976
    Description 68299 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 68299mt
  • Year 1977
    Description 73599 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 73599mt
  • Year 1978
    Description 76500 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 76500mt
  • Year 1979
    Description 73799 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 73799mt

Workings at the site

  • Type of workings Surface
    Area 400HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OPEN PIT
    Capacity 333
    Capacity Units MT ORE/DAY
    Unit Production Cost 4.95
    Units of Production $/MT ORE
    Operating Days per Year 300
    Year of Information 1981
  • Type of workings Surface
    Area 400HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Capacity 400
    Capacity Units MT ORE/DAY
    Unit Production Cost 4.95
    Units of Production $/MT ORE
    Operating Days per Year 300
    Year of Information 1981

Comments on the workings information

  • TWO WET SEASONS: MID-MAY TO MID-AUGUST, LATE NOVEMBER TO MID-FEBRUARY.

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 90MM. ORE IS WASHED. IMPURITIES FROM CALCINE AND METAL GRADE FEEDS PASS THROUGH SCREEN AND ARE SENT TO FINES RECOVERY PLANT, TREATED IN HYDRO- CYCLONES 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. SMELTER FOR GUYANA IS IN PLANNING STAGES. DEVELOPMENT DEPENDS UPON CONSTRUCTION OF HYDROELECTRIC PLANT.

Reference information

Bibliographic references

  • Deposit

    BLEACKLEY, D. 1964. BAUXITES AND LATERITES OF BRITISH GUIANA

  • Deposit

    GEOLOGICAL SURVEY OF BRITISH GUIANA, BULL. NO. 34.

  • Deposit

    VELASQUEZ, JOSE DARIO H., 1972. LIMITS OF ECONOMIC FEASIBILI

  • Deposit

    BAUXITE IN WESTERN COLUMBIA. THESIS DEPT. OF MINERAL ECONOMI

  • Deposit

    COLO. SCHOOL OF MINES, GOLDEN. GEN. INFO. APPL. TO GUIANA MI

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-1996 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.

Maps centered on this site