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Mineraria Silius

Plant in Sardegna, Italy with commodities Fluorine-Fluorite, Lead
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Nearby scientific data
  7. Ore body information
  8. Economic information about the deposit and operations
  9. Ownership information
  10. Production statistics
  11. Reserves and resources
  12. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10303765
MAS/MILS ID 4750310008
Record type Site
Current site name Mineraria Silius
Alternate or previous names Gerrei Mines

Geographic coordinates

Point of reference Plant
Geographic coordinates: 9.30185, 39.33232 (WGS84)
Location accuracy 10000(meters)

Site location context

Political divisions (FIPS codes)

Sardegna(province)

Italy(country)

Europe(continent)

Land(continent)

Geographic areas

Country State
Italy Sardegna

Commodities

Commodity Importance
Fluorine-Fluorite Critical Primary
Lead Secondary

Nearby scientific data

Plant (1) 9.30185, 39.33232
ListMap

Economic information

Ore body information

  • Strike N45E
    Dip 90E
    Thickness 5M
    Length 3500M
    Field Value
    MAS Matrix # 9
    MAS Column # 5
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Strike And Dip N45E:90E
    Date of Last Modification 920423

Comments on the geologic information

  • MINES + HEAVY MEDIA LOC. = N392000 E0091800. FLOT. MILL LOC. = N391000 E0090000.(ASSEMINI,IT.) CAGLIARI(PORT) = N390800 E0090500. PORTO VESME(PB SMELTER) = N390700 E0081400.
  • MINERALIZATION OCCURS IN TWO VEIN SYSTEMS NAMED SAN GIORGIO AND SAN GIUSEPPE. THESE VEINS ARE ROUGHLY PARALLEL, 1 TO 5 M WIDE. AT 200 TO 300 M DEEP THEY CONVERGE TO FORM A SINGLE VEIN 4 TO 6 M WIDE.

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Both
Significant Yes
Mining method Open Stope - Sublevel
Plant type Beneficiation (Mill)
Plant subcategory Flotation
Milling method Flotation

Ownership information

  • Type Owner
    Owner Count Carlo Giulini
    Interest 60
    Home office Italy
    Year 1991
  • Type Owner
    Owner Sardinian Regional Government
    Interest 40
    Home office Italy
    Year 1991
  • Type Operator
    Owner Mineraria Silius S. P. A.
    Home office Italy
    Year 1991

Production statistics

  • Year 1988
    Description Acid Spar 80000 Mt Concentrate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Fluorine-Fluorite Fluorine 80000mt
  • Year 1989
    Material ore
    Ore mined 240000mt
    Description 1989 Total Ore Produced 240000 Mt Ore
    Acid Spar 66000 Mt Concentrate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Fluorine-Fluorite Fluorine 66000mt
  • Year 1990
    Material ore
    Ore mined 289392mt
    Description 1990 Total Ore Produced 289392 Mt Ore
    Acid Spar 73000 Mt Concentrate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Fluorine-Fluorite Fluorine 73000mt

Comments on the production information

  • LOW 1989 PRODUCTION DUE TO HANGINGWALL COLLAPSE.

Reserves and resources

  • Type In-situ
    Estimate year 1991
    Measured 5500000mt ore
    Indicated 1000000mt ore
    Demonstrated 6500000mt ore
    Inferred 5000000mt ore
    Total resources 11500000mt ore
    Commodity Subtype Grade units Group Importance Year
    Fluorine-Fluorite CaF2 0.33 wt-pct Fluorine Major 1991

Comments on the reserve resource information

  • Q5 = TOTAL RESERVES FOR SAN GIORGIO AND SAN GIUSEPPE. RESERVES ESTIMATED BY SILIUS MANAGEMENT.

Workings at the site

  • Type of workings Underground
    Overall depth 350M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method SUBLEVEL 10-43
    Number of Shafts 4
    Capacity 1200
    Capacity Units MT ORE/DAY
    Operating Days per Year 240
    Operating Shifts per Day 2
    Year of Information 1991

Comments on other economic factors

  • THE COMPANY DECIDED TO BUILD A NEW PLANT AT THE MINE SITE. THE NEW FACILITY IS EXPECTED TO OPEN IN EARLY 1994 AT A COST OF $10-12 MILLION.

Reference information

Bibliographic references

  • Geology

    THE TIMES WORLD ATLAS.(COORDINATES).

  • Deposit

    ARGALL, G., WORLD MINES REGISTER 1976-1977, MILLER FREEMAN

  • Deposit

    PUBLICATIONS, INC., SAN FRANCISCO, 1976, P. 102.

  • Deposit

    LEDBETTER, J., 1979-80 WORLD MINES REGISTER, MILLER FREEMAN

  • Deposit

    PUBLICATIONS, INC., SAN FRANCISCO, 1978, P. 116.

  • Deposit

    INDUSTRIAL MINERALS, JUNE 1, 1982, ITALY, SILIUS

  • Deposit

    UNCHALLENGED.

  • Deposit

    CONFIDENTIAL REPORT (COMMENTS: B,001-005).

Comments on the references

  • FULTON, ROBERT B. MINE/MILL/DEPOSIT REPORT. MINERARIA SILIUS. SEPT., 1991.

General comments

Subject category Comment text
Deposit DATA CONTAINED IN THIS FILE WAS COLLECTED BY DAMES & MOORE UNDER U.S. BUREAU OF MINES CONTRACT #JO225010 IN 1983.

Reporter information

Type Date Name Affiliation Comment
Reporter 27-DEC-1994 Cornellisson, Joseph L. 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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