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

Nyinahin

Prospect in Ashanti, Ghana with commodities Aluminum, Iron, Silica, Titanium
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. Land status
  13. Ownership information
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10256038
MAS/MILS ID 7490050001
Record type Site
Current site name Nyinahin
Alternate or previous names Nyinahin Yenahin

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -2.21526, 6.6428 (WGS84)
Elevation 600
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Ashanti(province)

Ghana(country)

Africa(continent)

Land(continent)

Geographic areas

Country State
Ghana Ashanti

Commodities

Commodity Importance
Aluminum Critical Primary
Iron Tertiary
Silica Tertiary
Titanium Critical Tertiary

Materials information

Materials Type of material
Boehmite Unknown
Gibbsite Unknown
Goethite Unknown
Hematite Unknown
Ilmenite Unknown
Kaolinite Unknown
Quartz Unknown

Nearby scientific data

Ore Body (1) -2.21526, 6.6428
ListMap

Economic information

Ore body information

  • Thickness 6.1M
    Area 1931HA
    Depth to top 2M
    Field Value
    Type of Orebody #1 LATERITE
    Shape of Orebody #1 MANTLELIKE
    Shape of Orebody #2 TABULAR
    Shape of Orebody #3 IRREGULAR
    Primary mode of Origin RESIDUAL CONCENT
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. UNKNOWN
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 1931
    Date of Last Modification 830624

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Commodity type Metallic
Significant No
Discovery year 1922

Mining district

District name Ashanti Trend

Mineral rights holdings

Type of mineral rights Unknown

Land status

Ownership category Unknown

Ownership information

  • Type Owner
    Owner Ghana Government
    Interest 100
    Home office Ghana
    Year 1981

Reserves and resources

  • Type In-situ
    Estimate year 1991
    Indicated 180000000mt ore
    Demonstrated 180000000mt ore
    Total resources 180000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Al2O3 45 wt-pct Aluminum Major 1991

Comments on the reserve resource information

  • THE DEPOSITS CAP 10 HILLS THAT STRETCH FOR 32 KILOMETERS IN A NE TRENDING CHAIN. HILL 1: NYINAHIN NO. 1 HILL 2: NYINAHIN NO. 2 HILL 3: NYINAHIN NO. 3 HILL 4: ABRANTIAKROM HILL 5: ABRANTIAKROM HILL 6: MPESASO NO. 1 AND 2 HILL 7: MPSEASO NO. 3 HILL 8: MPESASO NO. 3 HILL 9: AYA BEPO HILL 10: UNNAMED

Workings at the site

  • Type of workings Surface
    Area 1931HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Percent Waste Rock .9
    Avg. Overburden Thickness 2
    Primary Material Cover SAND, SILT
    Percentage 100
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 6.1
    Capacity 1389
    Capacity Units MT ORE/DAY
    Unit Production Cost 2.36
    Units of Production $/MT ORE
    Operating Days per Year 360
    Year of Information 1981
  • Type of workings Surface
    Area 1931HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Percent Waste Rock .9
    Avg. Overburden Thickness 2
    Primary Material Cover SAND, SILT
    Percentage 100
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 10
    Capacity 9722
    Capacity Units MT ORE/DAY
    Unit Production Cost 2.36
    Units of Production $/MT ORE
    Operating Days per Year 360
    Year of Information 1981

Reference information

Bibliographic references

  • Deposit

    COOPER,W.G. BAUXITE DEPOSITS OF THE GOLD COAST, GOLD COAST

  • Deposit

    GEOLOGICAL SURVEY, BULL. NO.7, 1936, PP.22-29.

  • Deposit

    BAUXITE,ALUMINA AND ALUMINUM IN 1975, JAMAICA BAUXITE

  • Deposit

    INSTITUTE, DIV.OF ECON., STATITICS AND PROJECT EVALUATION

  • Deposit

    , KINGSTON, JAMAICA, JUNE 1976, P.16.

  • Deposit

    DMA MAP SERVIES 1501, SHEET NB 30-7, SCALE 1:250,000.

  • Deposit

    KESSE, G.O., BAUXITE DEPOSITS OF GHANA, GHANA GEOLOGICAL

  • Deposit

    SURVEY, REPORT NO. 75/2, 1974.

General comments

Subject category Comment text
Deposit 8 SEPARATE BAUXITE DEPOSITS OCCUR OVER A NE-SW LENGTH OF 27 KM. DEPOSITS OCCUR AS CAPPINGS OF HILLS WHICH FORM A PROMINENT RANGE LOCATED ABOUT 64 KM W OF KUMASI. ACCORDING TO COOPER: WITH INTELLIGENT ATTENTION TO GRADE CONTROL (BY AVOIDING OR DISCARDING WHOLLY FERRUGINOUS AREAS) THE AL2O3 GRADE OF ORE CAN RUN 50,55,OR 60%. HILLS I,II,III & IV CALLED YENAHIN GROUP. HILLS V,VII & VIII CALLED THE MPEPASO GROUP. BAUXITE OCCURS AS LOCAL ENRICHMENTS IN REMNANTS OF HIGHLY- DISSECTED, LATERITE COVERED PLATEAU (UPPER BIRRMIAN AGE LAVAS AND PHYLLITES ARE SOURCE ROCKS). OVERBURDEN OF SOFT, RED SOIL & SOME RUBBLY SUBSOIL VARIES FROM 0-1.8 M THICK WHILE LATERITE CAPPINGS VARY FROM 6.1 TO 15.2 M THICK. AVG. BAUXITE THICKNESS WHERE STUDIED IS ABOUT 10 M. BAUXITE MOSTLY VERMICULAR, SOFT IN LOWER PORTIONS, HARD IN UPPER PORTIONS.

Reporter information

Type Date Name Affiliation Comment
Reporter 29-DEC-94 Wilburn, David R. 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