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Moinho/Sao Joao

Plant in Portugal with commodity Sulfur
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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. Ownership information
  12. Production statistics
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10255423
MAS/MILS ID 4710000005
Record type Site
Current site name Moinho/Sao Joao
Alternate or previous names Algares/Sao Joao

Comments on the site names

  • MOINHO AND SAO JOAO ARE VIRTUALLY TWO SECTIONS OF THE SAME MINE. AS OF DEC. 1983, MOINHO IS ACTIVE AND SAO JOAO IS TEMPORARILY SHUT DOWN. THE PLANT DOES NOT INCLUDE BENEFICIATION, BUT CRUSHING ONLY.

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -8.16491, 37.86685 (WGS84)

Site location context

Political divisions (FIPS codes)

Portugal(country)

Europe(continent)

Land(continent)

Geographic areas

Country
Portugal

Commodities

Commodity Importance
Sulfur Primary

Materials information

Materials Type of material
Chalcopyrite Unknown
Galena Unknown
Gold Unknown
Silver Unknown
Sphalerite Unknown

Nearby scientific data

Main Entrance (1) -8.16491, 37.86685
ListMap

Economic information

Ore body information

  • Strike N40W
    Dip 67E
    Thickness 50M
    Length 1500M
    Width 800M
    Depth to top 30M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 STRATIFORM
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 MASS SULFIDE
    Shape of Orebody #2 IRREGULAR
    Shape of Orebody #3 MASSIVE
    Primary mode of Origin UNKNOWN
    Degree of Wallrock Alter. UNKNOWN
    Strike And Dip N40W:67E
    Minimum Depth to Top 10
    Avg. Thick. Unconsol. Mat. 10
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 851118

Comments on the geologic information

  • THE FORMATION NAME IS UNREPORTED. ITS AGE IS LOWER CAR- BONIFEROUS (EQUIVALENT TO MISSISSIPPIAN). THE PYRITE ORE IS FOUND IN A LOWER CARBONIFEROUS VOLCANIC SILICEOUS COMPLEX. THE LABOR REQUIRMENTS FOR THE MOINHO/SAO JOAO MINE-MILL ARE NOT INDIVIDUALLY REPORTED. FOR THE WHOLE ALJUSTREL COMPLEX, WHICH INCLUDES MOINHO/SAO JOAO, FEITAIS, AND ALGA- RES; THE TOTAL LABOR IS ESTIMATED TO BE 550 WORKERS. MORE LIKELY 73 PERCENT OF THIS FIGURE WILL CORRESPOND WITH MOINHO/SAO JOAO. AN ASSUMED BREAKDOWN IS 80 PERCENT OF THE LABOR FOR THE MINE AND 20 PERCENT FOR THE MILL.

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Non-metallic
Significant No
Year of first production 1925
Plant subcategory Crush

Mining district

District name Aljustrel

Ownership information

  • Type Unknown
    Owner Edma (Empresa De Desenvolvimiento Mineiro Do Alentajo)
    Interest 94
    Year 1983
  • Type Unknown
    Owner Sogemindus
    Interest 6
    Year 1983

Production statistics

  • Year 1898
    Description Copper Ore (Undetermined Tonnage)
  • Year 1925
    Description Pyrite (Undetrmined Tonnage)
  • Year 1973
    Description 45-Percent S Pyrite 274000 Metric Tons
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Sulfur Sulfur 274000mt 45wt-pct
  • Year 1974
    Description 45-Percent S Pyrite 280000 Metric Tons
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Sulfur Sulfur 280000mt 45wt-pct
  • Year 1975
    Description 45-Percent S Pyrite 228000 Metric Tons
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Sulfur Sulfur 228000mt 45wt-pct
  • Year 1976
    Description 45-Percent S Pyrite 208000 Metric Tons
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Sulfur Sulfur 208000mt 45wt-pct
  • Year 1977
    Description 45-Percent S Pyrite 195000 Metric Tons
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Sulfur Sulfur 195000mt 45wt-pct
  • Year 1979
    Description 45-Percent S Pyrite 184000 Metric Tons
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Sulfur Sulfur 184000mt 45wt-pct
  • Year 1979
    Description 45-Percent S Pyrite 169000 Metric Tons
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Sulfur Sulfur 169000mt 45wt-pct
  • Year 1980
    Description 45-Percent S Pyrite 221000 Metric Tons
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Sulfur Sulfur 221000mt 45wt-pct
  • Year 1981
    Description 45-Percent S Pyrite 150000 Metric Tons
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Sulfur Sulfur 150000mt 45wt-pct
  • Year 1982
    Description 45-Percent S Pyrite 162000 Metric Tons
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Sulfur Sulfur 162000mt 45wt-pct

Comments on the production information

  • 1925 IS THE YEAR WHEN PYRITE WAS FIRST PRODUCED. THE TONNAGE PRODUCED IS UNDETERMINED.
  • MOINHO AND SAO JOAO ARE VIRTUALLY TWO SECTIONS OF THE SAME MINE. AS OF DEC. 1983, MOINHO IS ACTIVE AND SAO JOAO IS TEMPORARILY SHUT DOWN. THE PLANT DOES NOT INCLUDE BENEFICIATION, BUT CRUSHING ONLY.

Comments on the reserve resource information

  • THE Q-MATRIX IS FIGURED ON THE BASIS OF 40 PERCENT SULFUR,S, (MASSIVE SULPHIDE) TO ACCOUNT FOR INTRUSIONS OF ACID PYRO- CLASTIC VOLCANICS WITHIN THE IN-SITU VOLUME. DURING EXTRACTIONS THESE NON-SULPHIDE BODIES WILL BE MINED AROUND POSSIBLY WITHIN THE 70-PERCENT RECOVERY, YIELDING A MILL FEED, WHICH GRADES 45-PERCENT S. M1C1 REMARKS APPLY TO M9C4.

Workings at the site

  • Type of workings Underground
    Overall depth 200M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method HORIZ CUT & FILL W/WASTE ROCK 10-60
    Percent Recovery 70
    Hardness of Rock UNKNOWN
    Rock Characteristics UNKNOWN
    Rock Support Chars. SUPPORTING
    Mine Support Chars. UNKNOWN
    Number of Shafts 1
    1st Condition of Workings OPEN
    2nd Condition of Workings PART ACCESSIBLE
    3rd Condition of Workings UNKNOWN
    Capacity 2000
    Capacity Units MT ORE/DAY
    Unit Production Cost 11.82
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 3
    Year of Information 1983

Comments on other economic factors

  • THE PYRITE CONVERSION COST IS PRESUMED TO BE GIVEN IN JAN. 1982 DOLLARS.

Reference information

Bibliographic references

  • Deposit

    INDUSTRIAL MINERALS. PORTUGUESE PYRITES, SEPT. 1980,

  • Deposit

    PP. 47.

  • Deposit

    MINING ANNUAL REVIEW, PUBLISHED BY MINING JOURNAL, 1981.

  • Deposit

    SULFUR. EXPANSION PLANS AT ALJUSTREL, NO. 148, MAY/JUNE

  • Deposit

    1980.

  • Deposit

    WORLD SURVEY OF SULFUR RESOURCES, BRITISH SULFUR, 2ND.

  • Deposit

    EDITION, 1974.

Comments on the references

  • INFORMATION SOURCES, WHICH APPEAR TO BE UNPUBLISHED ARE INFORMATION SUPPLIED BY PIRITES ALENTEJANAS, SARL DURING APRIL/MAY 1983 ALJUSTREL MINE VISIT (INVESTIGATOR - FRANK HICKS, ASSISTANT MANAGER OF BENEFICIATION PROJECTS, JACOBS ENGINEERING). INFORMATION SUPPLIED BY MINES ET INDUSTRIES S. A., DURING LOUSAL MINE VISIT (INVESTIGATOR - FRANK HICKS).

General comments

Subject category Comment text
Deposit THE STRIKE AND DIP OF THE MINERALIZED ZONE WERE ROUGHLY ESTIMATED FROM THE REPORT FIGURES 1 AND 2.

Reporter information

Type Date Name Affiliation Comment
Reporter 16-APR-1991 Amaro, R. 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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