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Djebel Onk

Prospect in Algeria with commodities Phosphorus-Phosphates, Fluorine-Fluorite
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Host and associated rocks
  7. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Ownership information
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10024677
MRDS ID ISM0410
Record type Site
Current site name Djebel Onk

Geographic coordinates

Geographic coordinates: 7.91841, 34.74922 (WGS84)
Relative position CENTROID, ABOUT 10 KM

Site location context

Political divisions (FIPS codes)

Algeria(country)

Africa(continent)

Land(continent)

Geographic areas

Country
Algeria

Comments on the location information

  • ROUGH ESTIMATE FROM 1/2 MILLION SCALE MAP

Commodities

Commodity Importance
Phosphorus-Phosphates Primary
Fluorine-Fluorite Critical Primary

Comments on the commodity information

  • PHOSPHATE

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Marnes Noires, Thanet;Ypresian
    Rock description Marnes Noires, Thanet;Ypresian

Nearby scientific data

(1) 7.91841, 34.74922
ListMap

Economic information

Ore body information

  • Depth to top 120M

Comments on the geologic information

  • ; APATITE, DOLOMITE, CALCITE, ARGILLITIC MATERIAL, SILICA; THANETIAN PHOSPHATES DISPLAY TOTAL THICKNESS OF 30-35 M UP TO 9 PHOSPHATE BEDS CAN BE IDENTIFIED WHICH ARE SEPERATED BY ARGILLITIC BARREN INTERCALATIONS IN THE LOWER PART AND BY DOLOMITES IN THE UPPER PART OF THE SEQUENCE. A LUTETIAN EVAPORITIC SEDIMENTARY SEQUENCE CONTAINING GYPSUM AND MIOCENE SANDS FORM COVER OF DEPOSIT

Economic information about the deposit and operations

Development status Prospect
Commodity type Non-metallic
Significant No
Year of first production 1963
Year of last production 1982

Mining district

District name Gafsa Basin

Ownership information

  • Type Operator
    Owner Sonarem
  • Type Owner
    Owner Societe Nationale Des Recherches Et D'Exploration Miniere (Sonarem), State Owned

Comments on the production information

  • CAPACITY 2.4 MILLION TPY ROM-ORE PLANNED INCREASE 0.6 MILLION TPY ROM-ORE 5 YEAR AVERAGE. PRESENT MINE CAPACITY MILLION TPY CONCENTRATE BRITISH SULPHUR, CORP. LTD., 1980: WORLD SURVEY OF PHOSPHATE DEPOSITS, 4TH ED., P.141, LONDON

Comments on the reserve resource information

  • 180 MILLION TONNES REFERS TO RESERVES AVAILABLE IN OPENCAST OPERS AND IS INCLUDED IN THE 300 MILLION ESTIMATE

Comments on development

  • NON-GEOLOGIC CONSTRAINTS ON DEVELOPMENT OR EXPANSION IN 1-5 YRS. (). DEVELOPMENT(YES); EXPLORATION(YES); PRESENT MINE CAPACITY IS 2.4 MILLION TPY ROM-ORE WHICH, PROCESSED IN THE PLANT GIVES 1.43 MILLION TONNES OF A 63-65 % BPL CONCENTRATE, OF WHICH 0.8 MILLION TONNES CAN BE UPGRADED TO YIELD 0.5 MILLION TONNES OF 75-77 % BPL PRODUCT. MINE OUTPUT IS TO BE INCREASED IN STEPS OF 0.6 MILLION TPY OF 63 % BPL PRODUCT. BENEFICIATION: CRUSHING, SCREENING, DESLIMING GIVES AN INTERMEDIATE PRODUCT GRADING 62.5 % BPL. CALCINATION RAISES BPL GRADE TO 69.5 %, WASHING WITH CONTINUONS CARBONATION YIELDS 75.5 % BPL CONCENTRATE. ROTARY KILNS FOR DRYING. CHEMISTRY: 1) ROM-ORE: 53.8 % BPL, 24.6 % P2O5, 1.7 % F, 0.1 % CL, 3.0 % SO3, 10.1 % CO2, 46.1 % CAO, 2.7 % MGO, 0.8 % AL2O3, 0.6 % FE2O3, 0.2 % K2O, 1.3 % NA2O, 3.8 % SIO2, 3.6 % LOI; 2) INTERMEDIATE PRODUCT: 64.4 % BPL, 29.57 % P2O5, 3.74 % F, 0.05 % CL, 2.65 % SO3, 7.33 % CO2, 48.65 % CAO, 1.4 % MGO, 0.45 % AL2O3, 0.39 % FE2O3, 0.14 % K2O, 1.34 %
  • NA2O, 2.67 % SIO2, 3.01 % LOI. SOURCE: BRITISH SULPHUR, CORP. LTD., 1980: WORLD SURVEY OF PHOSPHATE DEPOSITS, 4TH ED., LONDON

Reference information

Bibliographic references

  • Deposit

    BRITISH SULPHUR CORP. LTD., 1980: WORLD SURVEY OF PHOSPHATE DEPOSITS, 4TH ED., LONDON

  • Deposit

    OUSSEDIK, M. ET AL., 1979: LES MINERALISATIONS PHOSPHATES EOCENES EN ALGERIE..., DOCUMENTS DU BRGM, NO.24, 1980, ORLEANS

  • Deposit

    SERMI, 1963: GISEMENT DE PHOSPHATE DE CHAUX DE DJEBEL ONK, 50 P.

  • Production

    BRITISH SULPHUR, CORP. LTD., 1980: WORLD SURVEY OF PHOSPHATE DEPOSITS, 4TH ED., LONDON

General comments

Subject category Comment text
Deposit THIS RECORD WAS COMPILED FOR THE INTERNATIONAL STRATEGIC MINERALS INVENTORY. THE DATA WERE USED IN PREPARATION OF THE USGS CIRCULAR 930 SERIES OF REPORTS. MINERAL RESOURCE CATEGORIES AND CODES HEREIN ARE FROM THE INTERNATIONAL CLASSIFICATION SYSTEM RECOMMENDED BY THE UNITED NATIONS GROUP OF EXPERTS ON DEFINITIONS AND TERMINOLOGY FOR MINERAL RESOURCES. (SEE NATIONAL RESOURCES FORUM, V. 4, NO. 3, P. 307-313.). SURFACE 0-120 M SEE FOR C18 BREAKDOWN OF MINE PRODUCTION (1978-1981)IN YOUSSOUFIA FIELD (1000 TONNES): 4725/1978 (33 % OP/67 % UG); 5343/1979 (34 % OP/66 % UG); 5507/1980 (31 % OP/69 % UG); 6022/1981 (28 % OP/72 % UG). RESERVES FOR TOTAL GANNTOUR DEPOSIT MAY AMOUNT AT LEAST TO 6,8 BILLIONS OF TONNES. SEE RECORD FORM GANNTOUR FOR DETAILS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1982 Krauss, Ulrich H. Bundesanstalt Fuer Geowissenschaften und Rohstoffee (Germany)

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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