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  3. Mineral Resource Data System (MRDS)

Corvillo

Plant in Sicilia, Italy with commodity Potassium
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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. 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 10134441
MAS/MILS ID 4750330008
Record type Site
Current site name Corvillo

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 14.13508, 37.63231 (WGS84)
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Sicilia(province)

Italy(country)

Europe(continent)

Land(continent)

Geographic areas

Country State
Italy Sicilia

Commodities

Commodity Importance
Potassium Primary

Materials information

Materials Type of material
Anhydrite Unknown
Carnallite Unknown
Kainite Unknown
Polyhalite Unknown
Sylvite Unknown

Nearby scientific data

Ore Body (1) 14.13508, 37.63231
ListMap

Economic information

Ore body information

  • Thickness 5M
    Depth to top 400M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin EVAPORATION
    Primary Ore Control BEDDING
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 200
    Date of Last Modification 850103
  • Area 4540HA
    Field Value
    Total Surface Area (HA) 4540
    Date of Last Modification 910418

Comments on the geologic information

  • THE CORVILLO OREBODY IS ONE OF MANY EVAPORATIVE DEPOSITS ALIGNED IN A BELT 550 KM. LONG THAT RUNS FROM THE CENTER OF SICILY WEST-SOUTHWEST TO THE SEA. MINERALIZATION OCCURS BETWEEN DEPTHS OF 200 TO 600 M. WITH THICKNESSES RANGING FROM 2 TO 8M., WHICH IS RELATIVELY THIN COMPARED WITH OTHER ACTIVE DEPOSITS. THE ORE GRADE IS REPORTED TO BE "MODEST" AND THE DEPOSIT IS VERY IRREGULAR.

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Non-metallic
Significant No
Mining method Open Stope - Room and Pillar
Year of first production 1964
Plant type Beneficiation (Mill)
Plant subcategory Flotation
Milling method Flotation

Mining district

District name Enna Province

Mineral rights holdings

Type of mineral rights Minerals Only

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Industria Sali Potassici E Affini (Ispea)
    Home office Italy
    Year 1982
  • Type Owner
    Owner Italkalki Spa.
    Home office Italy
    Year 1982

Comments on the ownership information

  • COMPANY ALSO KNOWN AS "ISPEA"; OTHER OWNER IS ITALKALKI SPA.

Comments on the production information

  • THE MINE BEGAN PRODUCTION IN 1964, BUT ITS KAINITE PRO- DUCTION WAS DELAYED AS ITS PLANT , THE PASQUASIA PLANT, DID NOT OPEN UNTIL 1973.

Reserves and resources

  • Type In-situ
    Estimate year 1979
    Commodity Subtype Grade units Group Importance Year
    Potassium K2o 11.12 wt-pct Potassium Major 1979

Comments on the reserve resource information

  • RECORD 1 DID NOT HAVE TONNAGE DATA ENTERED (850103-MODIFIC). BIBLLOGRAPHIC REFERENCE COULD NOT BE LOCATED TO UPDATE THIS DATA. COMMODITY DATA CHANGED FROM "K2SO4" TO "K2O", GRADE WAS CORRECTED, AND MINERAL TYPE ADD.
  • ESTIMATED INSITU ORE RESOURCES USED IN THE 1984 ECONOMIC EVALUATION OF THE PROPERTY. DATA BASED ON INFORMATION FROM THE DEPOSIT REPORT PREPARED BY THE CONTRACTOR.

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method ROOM AND PILLAR 10-34
    Percent Recovery 40
    Hardness of Rock SOFT SEMIPLASTIC WITH LITTLE WATER
    Rock Characteristics SEMIPLASTIC OR PLASTIC
    Rock Support Chars. SUPPORTING WHEN DRY
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    1st Condition of Workings OPEN
    Capacity 834
    Capacity Units MT ORE/DAY
    Operating Days per Year 240
    Operating Shifts per Day 2
    Year of Information 1982

Comments on other economic factors

  • THE CAPACITY FOR THE CONCENTRATOR IS THAT OF THE PASQUASIA PLANT WHICH TAKES ORE FROM PASQUASIA AND CORVILLO.

Reference information

Bibliographic references

  • Deposit

    RIORGANIZZAZIONE DEL BACINO ESTRATIVO DI SALI POTASSICI

  • Deposit

    DELLA SICILIA; ASSOCIAZIONE MINERARIA SUBALPINA, TORINO,

  • Deposit

    ITALY; JUNE 1979; DIRETTORE RESPONSABILE: LELIO STRAGIOTTI.

  • Deposit

    SALVATORE ADAMO AND LAMBERTO RAMBERTI; L'INDUSTRIA

  • Deposit

    ESTRATTIVA DEL POTASSIO IN ITALIA ; 1977.

  • Deposit

    NOTIZZE DI CARATTERE STORICO INDUSTRIALE SULLA ATTIVITA

  • Deposit

    DEL SALI POTASSICI IN SICILIA; I.S.P.E.A., SERVIZIO GEOLOG-

  • Deposit

    ICO; OCT. 1977.

  • Deposit

    LAMBERTO RAMBERTI; I GIACIMENTI SALINI SICILIANI, CARA-

  • Deposit

    TTERI GENECITI STRATIGRAFICI E PALEOAMBIENTALI; ASSOCIAZIONE

  • Deposit

    MINERARIA SUBALPINA; JUNE 1980.

  • Deposit

    BOLLETTINO REGIONALE MINERARIO, NO.23; PUBLISHED BY

  • Deposit

    REGIONE SICILIANA CORPO REGIONALE DELLE MINERE, PALERMO,

  • Deposit

    SICILY; 1980.

General comments

Subject category Comment text
Deposit IT HAS BEEN RECOMMENDED THAT THE CORVILLO MINE BE CLOSED BECAUSE OF THE FOLLOWING REASONS: FIRST, THE PRODUCTION ECONOMICS ARE POOR AT CORVILLO DUE TO THE OREBODY THINNESS, THE SIGNIFICANTLY LOWER GRADE OF THE CORVILLO ORE IN COMPAR- ISON TO PASQUASIA ORE, AND THE QUANTITY OF THE RESERVE. SEC- OND BOTH CORVILLO AND THE PASQUASIA MINE SEND ORE TO THE PASQUASIA PLANT. HOWEVER, IF BOTH OPERATIONS , WORKING AT CAPACITY,SENT OUTPUT TO PASQUASIA, THE PLANT WOULD BECOME SATURATED WITH FEED. THUS, PRODUCTION AT CORVILLO MEANS RE- DUCED OUTPUT AT PASQUASIA. THIS WOULD BRING THE PASQUASIA MINE CLOSER TO ITS BREAK-EVEN POINT LEADING TO A REDUCED PROFIT MARGIN. HOWEVER, IT IS ASSUMED THAT THE MINE WILL OPERATE AT CAPACITY FROM 1984 TILL MINEOUT OF THE RESERVES FOR TWO REASONS FIRST, THE CONCERN OVER THE ACCOUNTABILITY FOR INVESTMENTS WILL DELAY THE DECISION TO CLOSE;AND SECONDLY, NOTABLE RE- SERVES DO EXIST AND AT LEAST A TENTATIVE PLAN IS READY TO BEGIN OPERATIONS AGAIN.

Reporter information

Type Date Name Affiliation Comment
Reporter 03-JAN-95 Buckingham, David A. 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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