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Redeyef

Prospect in Qafsah, Tunisia 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. Geologic structures
  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 10024685
MRDS ID ISM0419
Record type Site
Current site name Redeyef
Alternate or previous names Redeyl, Redeyel

Geographic coordinates

Geographic coordinates: 8.1184, 34.36591 (WGS84)
Elevation 700
Relative position CENTROID ABOUT 2 KM

Site location context

Political divisions (FIPS codes)

Qafsah(province)

Tunisia(country)

Geographic areas

Country State
Tunisia Qafsah

Comments on the location information

  • MAS FILE CONTAINS 8 DEG. 25'E FOR L6, REPORTER'S DATA ARE FROM GEOL. MAP. TUNISIA. REDEYEF VILLAGE CONTAINED IN TIMES ATLAS: 34 DEG. 24'N; 8 DEG. 10'E
  • AT LEAST 7 SMALL DEPOSITS IN SEPERATED GRABENS AND BASINS. NAMES OF KNOWN OPERATIONS: DUWI 26 DEG. 16'N, 34 DEG. 00'E; NASSER 26 DEG. 04'N, 34 DEG. 09'E; HAMADAT 25 DEG. 59'N, 34 DEG. 10'E; TUNDUB 25 DEG. 56'N, 34 DEG. 13'E; ZUG EL BAHAR 25 DEG. 58'N, 34 DEG. 19'E; ATSHAN 26 DEG. 06'N, 34 DEG. 11'E; GIHANIA 26 DEG. 07'N, 34 DEG. 13'E; ABU SHIGELLA 26 DEG. 16'N, 34 DEG. 08'E; ANZ 26 DEG. 10'N, 34 DEG. 10'E; HAMRAWEIN 26 DEG. 19'N, 34 DEG. 05'E (SEE SEPARATE FORM)

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 > Clastic Sedimentary Rock > Argillite
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Metlaoui Formation;Metlaoui Formation;Metlaoui Formation
    Rock description Metlaoui Formation;Metlaoui Formation;Metlaoui Formation
  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Phosphorite

Nearby scientific data

(1) 8.1184, 34.36591
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Economic information

Geologic structures

Type of structure Regional
Structure description Gafsa Basin

Comments on the geologic information

  • ; APATITE (COLLOPHANE), CALCITE, DOLOMITE, JAROSITE, ILLITE, SMECTITE, QUARTZ, OPALE; STRATIGRAPHIC COLUMN FROM TOP TO BOTTOM: SOUAR FORMATION EO, METLAOUI FORMATION LPALEO-EO, EL-HARIA FORMATION LCRET-PALEO. METLAOUI FORMATION IS DIVIDED IN A LOWER EVAPORITIC SERIES A PHOSPHATE SERIES AND A CARBONATIC ROOF SERIES. PHOSPHATE SERIES IS ABOUT 15 M THICK IN REDEYEF. PHOSPHATE BED 2 (2A AND 2B SEPARATED BY A SMALL CARBONATIC INTERCALATION) OF UPPERMOST FAISCEAU D WITHIN PHOSPHATE SERIES IS MAIN PRODUCTIVE SEAM
  • ; APATITE (COLLOPHANE), SILICA, CALCITE, LIMONITE, KAOLINITE, MINOR: GYPSUM, HALITE; GENERAL STRATIGRAPHIC SEQUENCE (FROM TOP TO BOTTOM): - THEBES FORMATION, LIMESTONES, YPRESIAN, EEO; - ESHNA SHALES & MARLS, PALEO; - DAKHLA SHALES & LIMESTONES, DANIAN, PALEO; - DUWI PHOSPHATE FORMATION, MAESTRICHTIAN, LCRET; - VARIEGATED SHALES, CAMPANIAN, LCRET; - NUBIA SANDSTONE (?SANTONIAN CAMPANIAN), CRET; - BASEMENT ROCKS, LPREC-PAL. WITHIN DUWI FORMATION 3 PHOSPHATE BEDS HAVE BEEN DISTINGUISHED: THE UPPER SEAM ABOUT 2 M BELOW DAKHLA SHALES CONTAINS 45-50 % BPL AND RANGES IN THICKNESS 1-1.6 M, AND THE MIDDLE PHOSPHATE BED IS ABOUT 1 M THICK, BPL 54-70 %, ARE CONSIDERED TO BE WORKABLE

Economic information about the deposit and operations

Development status Prospect
Commodity type Non-metallic
Significant No
Discovery year 1899
Year of first production 1907

Mining district

District name Gafsa Phosphate District

Ownership information

  • Type Owner-Operator
    Owner Compagnie Des Phosphates De Gafsa (Cpg) (State Controlled)

Comments on the production information

  • 1.3 MILLION TPY ROM-OREPRODUCTION CAPACITY 1.3 MILLION TPA ORE (ROM)
  • EXPORT OF TOTAL RED SEA AREA WAS 229,000 AND 258,000 TONNES OF ROCK IN 1981 AND 1980 RESPECTIVELY PRODUCTION WILL POSSIBLY INCREASE WITH DEVELOPMENT OF ABU SHIGELLA DEPOSIT PRODUCTION FROM SEVERAL DEPOSITS AS MENTIONED ABOVE, RECENTLY PRODUCTION IS MAINLY FROM DUWI, HAMADAT AND ATSHAN MINES. BREAKDOWN OF PHOSPHATE PRODUCTION FROM RED SEA AREA NOT POSSIBLE

Comments on the reserve resource information

  • DENOTED AS "ESTIMATED RESERVES" ORE P INS B.35 C.MIL MT E.57 % BPL
  • PROVED AFTER E&MJ 62.3 MILLION REPORTERS OPINION: R2S, DENOTED IN SOURCE AS PROBABLE. TOTAL PROVEN & PROBABLE RESERVES ARE 200 MILLION TONNES
  • PROBABLE & INDICATED RESERVES, TOTAL OF SAFAGA AREA QUOTED AS "PROBABLE RESERVES". DUE TO LOW QUALITY OF ORES REPORTER WANTS TO CLASSIFY THESE ORES AS R2S. SHIGUELA ORES ONLY
  • PROVED RESERVES OF EL SHEGUELA MINE (?=ABU SHIGELLA R1E1). R1E2 TOTAL PROVED RESERVES OF SAFAGA AREA, R1E3 ZUG EL BAHAR, PROVED

Comments on development

  • NON-GEOLOGIC CONSTRAINTS ON DEVELOPMENT OR EXPANSION IN 1-5 YRS. (). ROM-ORE GRADES AT 57 % BPL (26 % P2O5) CONCENTRATES CONTAIN 65.6-67.7 % BPL. CONCENTRATES CONTAINING 60 % BPL AFTER PHOSPHORUS & POTASSIUM, NO.118, 1982, P.26
  • NON-GEOLOGIC CONSTRAINTS ON DEVELOPMENT OR EXPANSION IN 1-5 YRS. (). DEVELOPMENT(YES); EXPLORATION(YES); SMALL PLANT AT QUSSEIR PRODUCES FINEGROUND PHOSPHATE, WHICH IS SOLD UNDER THE TRADE NAME "KOSPHOS". SIMPLE BENEFICIATION AT MINE SITE. PRODUCT IS RAILED TO QUSSEIR PORT. SOME PORTIONS OF ROCK ARE WASHED IN SEAWATER AND DRIED IN AN OIL FIRED KILN. BY THIS TREATMENT BPL GRADE IS RAISED ABOUT 3 %. TO PRODUCE A UNIFORM PRODUCT GRADING AT 68 % BPL CONCENTRATES ARE BLENDED WITH ROCK, WHICH HAS NOT BEEN WASHED. A 600,000 TONNES CONCENTRATE MINE AT ABU SHIGELLA IS PLANNED TO REPLACE OLDER MINES BY 1985. CHEMISTRY: 65.3 % BPL, 29.86 % P2O5, 48.96 % CAO, 2.95 % F, 0.4 % CL, 6.09 % CO2, 2.51 % SO3, 0.98 % MGO, 1.5 % AL2O3 + FE2O3, 4.95 % SIO2. SOURCE OF INFO: 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

    FOURNIE, D., 1979: PHOSPHATES ET PETROLE EN TUNISIE. DOCUMENTS DU BRGM, NO.24, 1980

  • Deposit

    SASSI, S., 1979: CONTEXTE PALEOGEOGRAPHIQUE DES DEPOTS PHOSPHATES DE L'EOCENE EN TUNISIE. DOCUMENTS DU BRGM, NO.24, 1980

  • Deposit

    CHAABANI, F., 1978: LES PHOSPHORITES DE LA COUPE-TYPE DE FOUM-SELJA (METLAOUI-TUNISIE), THESIS, UNIVERSITY STRASBOURG

  • Production

    PHOSPHORUS & POTASSIUM, NO.118, MARCH/APRIL, 1982, P.25-26

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.). UNDERGROUND CRUSHING, SCREENING, DRYING, AIR SEPARATION
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.). UNDERGROUND WASHING, SUNDRYING, SCREENING NO DETAILED RESERVE CALCULATION SINCE HERMINA'S 1974, DATA

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-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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