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  3. Mineral Resource Data System (MRDS)

Viloco Sn

Plant in La Paz, Bolivia with commodities Tin, Tungsten
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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. Production statistics
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10231281
MAS/MILS ID 3350200039
Record type Site
Current site name Viloco Sn
Alternate or previous names Araca, Viloco

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -67.5828, -17.03098 (WGS84)
Elevation 4692
Location accuracy 10000(meters)

Site location context

Political divisions (FIPS codes)

La Paz(province)

Bolivia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Bolivia La Paz

Commodities

Commodity Importance
Tin Critical Tertiary
Tungsten Critical Primary

Materials information

Materials Type of material
Arsenopyrite Unknown
Cassiterite Unknown
Chalcopyrite Unknown
Galena Unknown
Jamesonite Unknown
Molybdenite Unknown
Pyrite Unknown
Quartz Unknown
Scheelite Unknown
Sphalerite Unknown
Tourmaline Unknown
Wolframite Unknown

Nearby scientific data

Ore Body (1) -67.5828, -17.03098
ListMap

Economic information

Ore body information

  • Strike N30E
    Dip 68W
    Thickness 0.6M
    Length 500M
    Width 550M
    Area 15HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Shape of Orebody #2 LENTICULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control LITHOLOGY
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 PYRITIZATION
    Type of Wallrock Alter. #2 CARBONATE SILIC
    Type of Wallrock Alter. #3 INTERM ARGILLIC
    Strike And Dip N30E:68W
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 15
    Date of Last Modification 830812

Comments on the geologic information

  • ORE IS FOUND IN 19 WOLFRAMITE VEINS.

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1902
Mining method Open Stope
Year of first production 1903
Plant type Beneficiation (Mill)
Plant subcategory Gravity
Milling method Gravity

Mining district

District name Viloco

Mineral rights holdings

Type of mineral rights State Lease
Type of mineral rights Minerals Only

Land status

Ownership category State

Ownership information

  • Type Owner-Operator
    Owner Corporacion Minera De Bolivia (Comibol)
    Interest 100
    Home office Bolivia
    Year 1976
  • Type Operator
    Owner Empresa Minera Viloco
    Year 1989

Production statistics

  • Year 1968
    Description Mt Ore/Yr 71940 Mt Ore
  • Year 1969
    Description Mt Ore/Yr 81532 Mt Ore
  • Year 1970
    Description Mt Ore/Yr 68230 Mt Ore
  • Year 1972
    Description Mt Ore/Yr 80300 Mt Ore
  • Year 1973
    Description Mt Ore/Yr 67000 Mt Ore
  • Year 1974
    Description Mt Ore/Yr 61475 Mt Ore
  • Year 1975
    Description Mt Ore/Yr 60280 Mt Ore
  • Year 1976
    Description Mt Ore/Yr 65950 Mt Ore
  • Year 1977
    Description Mt Ore/Yr 81314 Mt Ore
  • Year 1978
    Description Mt Ore/Yr 66708 Mt Ore
  • Year 1979
    Description Mt Ore/Yr 67144 Mt Ore
  • Year 1980
    Description Mt Ore/Yr 61900 Mt Ore
  • Year 1980
    Description Mt Ore/Yr 67690 Mt Ore
  • Year 1981
    Description Mt Ore/Yr 73466 Mt Ore
  • Year 1982
    Description Mt Ore/Yr 75000 Mt Ore
  • Year 1982
    Description Ore Input Is 1.28% Wo3; Output Is 67% Wo3 3399 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Tungsten Tungsten 3399mt 67wt-pct
  • Year 1983
    Description Mt Ore/Yr 49900 Mt Ore
  • Year 1984
    Description Mt Ore/Yr 38000 Mt Ore
  • Year 1985
    Description Mt Ore/Yr 52900 Mt Ore
  • Year 1986
    Description Mt Ore/Yr 29200 Mt Ore
  • Year 1987
    Description Mt Ore/Yr 26700 Mt Ore
  • Year 1988
    Description Mt Ore/Yr 30300 Mt Ore
  • Year 1992
    Period 1989-1992
    Description 1989 Thru 1992 50000 Mt Ore
  • Year 1993
    Description 1993 Mt Ore/Yr 18300 Mt Ore

Comments on the production information

  • MINE REACHED VIA 70 KM ROAD FROM PATACAMAYA ON LA PAZ-ORURO FROM 1903 OVER 50000 TONS SN PRODUCED. 1939-44 MINED FOR WO3 PRODUCED 600 T WO3, ALL DATA FROM AHLFELD, INCL. LOCATION. E 750 EMPLOYEES, MINE CAPAC. IS 10000 TO 100000 TPY ORE,GONC.- GRAVITY SEP.

Reserves and resources

  • Type In-situ
    Estimate year 1990
    Measured 36400mt ore
    Demonstrated 36400mt ore
    Total resources 36400mt ore
    Commodity Subtype Grade units Group Importance Year
    Tungsten Wo3 1.5 wt-pct Tungsten Major 1990

Comments on the reserve resource information

  • 1989 RESOURCE 218,295 MT BASED ON COMPANY INFORMATION PUBLIC INFO: ROSKILL INFORMATION SERVICES LTD.
  • OTHER NAME:ARACA; ALSO APPEARS ON ADIT UNDER 6400-TUNGSTEN. SN & W MINING. OPERATIONS RESTARTED AT AN INITIAL RATE 240 TPY.

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OVERHAND SHRINKAGE 10-67
    Percent Waste Rock 10
    Percent Recovery 90
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING WHEN DRY
    Mine Support Chars. CHEMICAL COATING
    Avg. Length of Adits (m) 1600
    1st Condition of Workings OPEN
    2nd Condition of Workings PART ACCESSIBLE
    Capacity 11.3
    Capacity Units MT ORE/DAY
    Unit Production Cost 36
    Units of Production $/MT ORE
    Operating Days per Year 302
    Operating Shifts per Day 1
    Year of Information 1982
  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method ESTIMATE
    Capacity 166
    Capacity Units MT ORE/DAY
    Unit Production Cost 34
    Units of Production $/MT ORE
    Operating Days per Year 302
    Operating Shifts per Day 1
    Year of Information 1989

Comments on other economic factors

  • CAPACITY REPORTED AT 240MT/DAY IN 1992
  • THERE IS NO PROCESSING PLANT AND ALL ORE CONCENTRATION IS DONE BY HAND AT THE ADIT ENTRANCES.

Reference information

Bibliographic references

  • Reserve-Resource

    ROSKILL INFORMATION SERVICES LTD., THE ECONOMICS OF TUNGSTEN

  • Reserve-Resource

    6'TH EDITION 1990. P 50.

  • Deposit

    AHLFELD, F., 1954, LOS YACIMIENTOS MINERALES DE BOLIVIA: BAN

  • Deposit

    MINERO DE BOLIVIA, LA PAZ, BOLIVIA, PP. 33.

  • Deposit

    PEREIRA BASCOPE, G., 1968, INVESTIGACIONES PRELIM. SOBRE TEC

  • Deposit

    Y METALOGEN. EN LAS CORD. REAL Y QUIMSA CRUZ: SER. GEOL. DE

  • Deposit

    BOL. 9, LA PAZ, 99 PGS.

  • Deposit

    ENGINEERING AND MINING JR., 1975, INTERN. DIRECTORY OF MININ

  • Deposit

    MCGRAW HILL, N. Y., P. 212.

  • Deposit

    FIELD DATA SUBMITTED BY MINTEC, LA PAZ.

Reporter information

Type Date Name Affiliation Comment
Reporter 17-APR-95 Bleiwas, Donald 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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