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

Hofrat En Nahas

Prospect in Sudan with commodity Copper
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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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mineral rights holdings
  11. Ownership information
  12. Reserves and resources
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10207894
MAS/MILS ID 7320150001
Record type Site
Current site name Hofrat En Nahas
Alternate or previous names Hofrat

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 24.31806, 9.75076 (WGS84)
Elevation 700
Location accuracy 5000(meters)

Site location context

Political divisions (FIPS codes)

Sudan(country)

Africa(continent)

Land(continent)

Geographic areas

Country
Sudan

Comments on the location information

  • LOCATED 60 KM NNW OF KAFIA KINGI, AND 260 KM SSW OF NYALA. DEPOSIT IS 1.6 KM W OF UNBELASHER RIVER. THE DEPOSIT IS OWNED BY THE SUDAN GOUIT.

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Unknown
Chrysocolla Unknown
Copper Unknown
Cuprite Unknown
Malachite Unknown
Tenorite Unknown

Nearby scientific data

Ore Body (1) 24.31806, 9.75076
ListMap

Economic information

Ore body information

  • Strike N45E
    Dip 80S
    Thickness 360M
    Length 450M
    Width 4M
    Field Value
    Type of Orebody #1 STOCKWORK
    Shape of Orebody #1 MASSIVE
    Type of Orebody #2 DISSEMINATED
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin CONT METASOMATIC
    Primary Ore Control FAULTING
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 SILICIFICATION
    Type of Wallrock Alter. #2 SERICITIC
    Strike And Dip N45E:80S
    Date of Last Modification 830712

Comments on the geologic information

  • SILICATES OUTCROP, CARBONATES AND OXIDES OCCUR TO A DEPTH OF 24.4 M AND SULPHIDES OCCUR AT DEPTH OF 119-128 M.---DE KUN,1965.

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Commodity type Metallic
Significant No
Milling method Flotation

Mineral rights holdings

Type of mineral rights Other

Ownership information

  • Type Owner
    Owner Sudan Government
    Interest 51
    Home office Sudan
    Year 1990
  • Type Owner
    Owner Armeno Resources, Inc.
    Home office Canada
    Year 1990
  • Type Operator
    Owner Armeno Baladna Mining And Pertoleum (Armbal)
    Interest 49
    Home office Sudan
    Year 1990

Comments on the production information

  • UNDP (U.N. DEVELOPMENT PROGRAM) CONDUCTED AIRBORN GEOPHYSICAL AND MAGNETIC SURVEYS AND TOPOGEOLOGICAL MAPPING OVER 18,000 SQ.KM. AROUND OLD WORKINGS DURING 1968-1971. THEY ALSO DID SOME TEST DRILLING TO COME UP WITH AN ESTIMATE OF 9,300,000 MT AT 4.0 % CU. SUDANESE GEOLOGICAL SURVEY CONTINUED EXPLORATION AND EVALUATION IN 1971-1973 (COMPLETED TOPO MAPPING, DETAILED GEOCHEMICAL SURVEY + 21 TEST DRILLHOLES IN OLD MINE AREA -TOTAL OF 3,344 M DRILLING, AVG. 159 M/HOLE.

Reserves and resources

  • Type In-situ
    Estimate year 1976
    Measured 5100000mt ore
    Indicated 9300000mt ore
    Demonstrated 14400000mt ore
    Total resources 14400000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 4.05 wt-pct Copper Major 1976
  • Type In-situ
    Estimate year 1976
    Total resources 8700000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 4 wt-pct Copper Major 1976
  • Type In-situ
    Estimate year 1976
    Total resources 20000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 5.9 wt-pct Copper Major 1976

Comments on the reserve resource information

  • RESERVES FROM 1973 UNDP STUDY: ESTIMATED 80% SULFIDE. SULFIDE. OXIDE RESOURCE IS EST 8,750,000 MT @ 3.34 % CU.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Primary Material Cover HARD ROCKS
    Hardness of Ore HARD ROCKS
    Capacity 2357
    Capacity Units MT ORE/DAY
    Unit Production Cost 10.66
    Units of Production $/MT ORE
    Operating Days per Year 350
    Year of Information 1981

Comments on the workings information

  • RAINFALL IS "SLIGHT".

Reference information

Bibliographic references

  • Reserve-Resource

    MINING MAGAZINE. MINING PROSPECTS FOR THE SUDAN. AUG. 1976,

  • Reserve-Resource

    P. 101.

  • Reserve-Resource

    MINING JOURNAL, NOVEMBER 24, 1989, P. 423.

  • Reserve-Resource

    INTERNATIONAL MINING, JANUARY 1990, PP. 48,49.

  • Reserve-Resource

    ARAB MINING JOURNAL, 1/81, V1/N2, P.24.

  • Deposit

    MINING MAGAZINE. MINING PROSPECTS FOR THE SUDAN, AUG.1976,

  • Deposit

    P.101.

  • Deposit

    DEKUN,N. THE MINERAL RESOURCES OF AFRICA, ELSEVIER PUBL. CO.

  • Deposit

    , LONDON, 1965, PP.68,373.

  • Deposit

    DMA SERIES 1301 MAP, SHEET NC-35, SCALE 1:1,000,000.

  • Deposit

    BABIKER, SAYED IBRAHIM MUDAWI-DIRECTOR, MINERAL DEVELOPMENT

  • Deposit

    ADMINISTRATION, GEOLOGICAL AND MINERAL RESOURCES DEPT.,

  • Deposit

    MINISTRY OF INDUSTRY AND MINING. THE COPPER MINES OF

  • Deposit

    HOFRAT EN NAHAS. NO DATE LISTED.

  • Deposit

    GOLDER ASSOCIATES, INC. DEPOSIT PROFILE-HOFRAT EN NAHAS,

  • Deposit

    SUDAN. JULY 1980.

  • Deposit

    UNITED NATIONS DEVELOPMENT PROGRAM. MINERAL SURVEY, TECHNIC-

  • Deposit

    AL REPORT, THE HOFRAT EN NAHAS COPPER DEPOSIT OF WEST-

  • Deposit

    ERN SUDAN. 1974

Reporter information

Type Date Name Affiliation Comment
Reporter 15-DEC-1994 Porter, Kenneth E. 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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