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Borralha Mines

Occurrence in Vila Real, Portugal with commodities Tungsten, Copper, Silver
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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. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Ownership information
  11. Production statistics
  12. Reserves and resources
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10055807
MRDS ID SP00005
Record type Site
Current site name Borralha Mines
Alternate or previous names Borralha Mines Couto Mineiro Da Borralha 35 Concessions, 16 Other Concessions, Including At One Time, Borrageira,, Outeiro Das Devesas, Picoto, Toncal, and Vale Do Forno

Geographic coordinates

Geographic coordinates: -7.81478, 41.68256 (WGS84)
Relative position APPROXIMATELY 55 KM ENE OF THE CITY OF BRAGA, NORTHERN PORTUGAL, IN SERRA DAS ATTURAS

Site location context

Political divisions (FIPS codes)

Vila Real(province)

Portugal(country)

Europe(continent)

Land(continent)

Geographic areas

Country State
Portugal Vila Real
Portugal Vila Real

Comments on the location information

  • ADDITIONAL STATE NAME: TRAS OS MONTES. BORRALHA 17.9 SQ KM; OTHER CONCESSIONS 8.2 SQ KM

Commodities

Commodity Importance
Tungsten Critical Primary
Copper Primary
Silver Primary

Comments on the commodity information

  • ORE MINERALS ARE ONLY POSSIBILITIES

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Scheelite Ore
Wolframite Ore
Albite Gangue
Apatite Gangue
Bismuthinite Gangue
Molybdenite Gangue
Muscovite Gangue
Pyrite Gangue
Quartz Gangue
Tourmaline Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Late Silurian
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -7.81478, 41.68256
ListMap

Economic information

Comments on the geologic information

  • DEPOSIT CONSISTS MAINLY OF QUARTZ VEINS AVERAGING 0.5 TO 1M WIDE. TUNGSTEN ALSO OCCURS IN STOCKWORK ZONES AND IN COLLAPSE (?) BRECCIAS. RATIO OF WOLFRAMITE TO SCHEELITE IS APPROXIMATELY 5:1 (REFERENCE 6, P. 14). LOCAL ENVIRONMENT IS PENNSYLVANIAN-PERMIAN GRANITIC INTRUSION AND ASSOCIATED COUNTRY ROCKS.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No
Discovery year 1905
Year of first production 1914
Year of last production 1985

Ownership information

  • Type Operator
    Owner Alicot Group
  • Type Owner
    Owner Minas De Borralha, S. A. R. L.

Production statistics

  • Year 1917
    Period 1914, 1917
    Material CON
    Accuracy Estimate
    Description Cp_Grade: ^100% W
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Conc. Tungsten Tungsten 100wt-pct
  • Year 1977
    Material CON W
    Accuracy Accurate
    Description Ap_Grade: ^70.3% W03
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Conc. Tungsten Tungsten 70wt-pct
  • Year 1978
    Material CON W
    Accuracy Accurate
    Description Ap_Grade: ^69.9% W03
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Conc. Tungsten Tungsten 70wt-pct
  • Year 1979
    Material CON W
    Accuracy Accurate
    Description Ap_Grade: ^70.5 W03
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Conc. Tungsten Tungsten 71wt-pct
  • Year 1980
    Period 1977-80
    Material W03
    Accuracy Accurate
    Description Cp_Grade: ^100% W03
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Tungsten Tungsten 100wt-pct
  • Year 1980
    Material CON W
    Accuracy Accurate
    Description Ap_Grade: ^70.0% W03
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Conc. Tungsten Tungsten 70wt-pct
  • Year 1982
    Period 1981-82
    Material W03
    Accuracy Estimate
    Description Cp_Grade: ^100% W03
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Tungsten Tungsten 100wt-pct

Comments on the production information

  • ANNUAL PRODUCTION COMMENTS: W (TUNGSTEN) IS ACTUALLY WOLFRAMITE. COUTO MINEIRO CONCESSIONS ONLY. PLUS SCHEELITE: 1977, 39.2 MT (68.6% W03); 1978, 39.4 MT (71.0% W03); 1979, 72.6 MT (70.7% W03); AND 1980, 76.3 MT (70% W03). IN 1981, OUTPUT WAS 355 MT COMBINED WOLFRAMITE/SCHEELITE; IN 1982, IT AMOUNTED TO 267 MT OF COMBINED WOLFRAMITE/SCHEELITE (REFERENCE 9)..

Reserves and resources

  • Type In-situ
    Estimate year 1979
    Total resources 360000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tungsten Wo3 1 wt-pct Tungsten Major 1979
  • Type In-situ
    Estimate year 1983
    Total resources 70000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tungsten Wo3 0.47 wt-pct Tungsten Major 1983

Comments on the reserve resource information

  • THE 1979 FIGURE IN THE AMOUNT OF 1440: ORE RESERVES FOR 4 YEARS PRODUCTION AT 360 TONNES PER YEAR OUTPUT OF CONCENTRATE. THE 1979 FIGURE IN THE AMOUNT OF 2160: ORE RESERVES FOR ADDITIONAL 6 YEARS INDICATED BY DEVELOPMENT TO 160M LEVEL. THE 1979 FIGURE IN THE AMOUNT OF 360000 AND THE 1983 FIGURE IN THE AMOUNT OF 70000: ORE RESERVES CALCULATED FROM REFERENCES 1 AND 9 ASSUMING AN ORE GRADE OF 1% W03 (MAY BE HIGH?). . "R" DENOTES RESOURCES IN SITU - QUANTITIES OF ECONOMIC INTEREST FOR THE NEXT FEW DECADES. "1" DENOTES KNOWN DEPOSITS WITH RELIABLE ESTIMATES. "E" DENOTES ECONOMICALLY EXPLOITABLE. "M" DENOTES MARGINALLY ECONOMIC. "S" DENOTES SUBECONOMIC.

Comments on development

  • PROCESSED TO FERROTUNGSTEN IN COMPANY'S PLANT

Reference information

Bibliographic references

  • Deposit

    SMITH, A., 1979, THE MINING OF TUNGSTEN, IN MINING JOURNAL BOOKS, LTD., TUNGSTEN: PROCEEDINGS OF THE FIRST INTERNATIONAL TUNGSTEN SYMPOSIUM, STOCKHOLM, P. 34, 56..

  • Deposit

    BUNDESANSTALT FUR GEOWISSENSCHAFTEN UND ROHSTOFFE, HANNOVER, 1977, UNTERSUCHUNGEN UBER MINERALISCHER ROHSTOFFE: IX WOLFRAM, P. 9..

  • Deposit

    UNITED STATES BUREAU OF MINES, 1951, MINERAL TRADE NOTES, NO. 5, P. 32-34..

  • Deposit

    STAFF, 1979, TUNGSTEN/MINAS DA BORRALHA, MINING JOURNAL, VOL. 292, NO. 7491, MARCH 16, 1979, P. 202..

  • Deposit

    CONDE, L. N., PEREIRA, V., RIBEIRO, A., AND THADEU, D., 1971, JAZIGOS HIPOGENICOS DE ESTANHO E VOLFRAMIO; LIVRO-GUIA EXCURSAO NO. 7, I CHLAGE, MADRID-LISBOA, LISBOA, P. 47-54..

  • Deposit

    REYNAUD, R., 1982, PRODUCTION AND MARKETING OF PORTUGUESE TUNGSTEN ORES IN PORTUGAL - EUROPEAN COMMUNITIES, EUROPEAN TUNGSTEN SEMINAR, LISBON, MARCH 22-24, 1982, 24 P..

  • Deposit

    GOINHAS, J. AND VIEGAS, L., 1980, PROVINCIA METALOGENETICA ESTANIFERA E TUNGSTENICA, IBERICA, ESTUDOS, NOTAS E TRABALHOS DE SERVICO DO FOMENTO MINEIRO, VOL. XXV, NOS. 3-4, 178 P..

  • Deposit

    ANSTETT, T. F., BLEIWAS, D. I., AND HURDELBRINK, R. J., 1985, TUNGSTEN AVAILABILITY - MARKET ECONOMY COUNTRIES, U. S. BUREAU OF MINES, INFORMATION CIRCULAR 9025, 51 P..

  • Deposit

    CHARTER CONSOLIDATED P.L.C., ANNUAL REPORTS.

  • Production

    INTERNATIONAL STRATEGIC MINERALS INVENTORY RECORD W081

General comments

Subject category Comment text
Deposit Discovery Year: 1900-1909

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1985 Pasitschniak Anna; Sinclair W. David Geological Survey of Canada

Beyond USGS

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

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