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  3. Mineral Resource Data System (MRDS)

Tasna

Plant in Potosi, Bolivia with commodities Bismuth, 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. Mineral rights holdings
  11. Land status
  12. Ownership information
  13. Reserves and resources
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10182348
MAS/MILS ID 3350350051
Record type Site
Current site name Tasna
Alternate or previous names Tazna

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -66.14945, -20.49758 (WGS84)
Elevation 4300
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Potosi(province)

Bolivia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Bolivia Potosi

Commodities

Commodity Importance
Bismuth Critical Primary
Tungsten Critical Primary

Materials information

Materials Type of material
Arsenopyrite Unknown
Bismuthinite Unknown
Chalcopyrite Unknown
Gold Unknown
Pyrrhotite Unknown
Quartz Unknown
Sphalerite Unknown
Stannite Unknown
Tourmaline Unknown
Wolframite Unknown

Nearby scientific data

Ore Body (1) -66.14945, -20.49758
ListMap

Economic information

Ore body information

  • Strike N10E
    Dip 60E
    Thickness 0.4M
    Length 600M
    Width 200M
    Area 20000HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SHEAR ZONE
    Shape of Orebody #2 LENTICULAR
    Type of Orebody #3 STOCKWORK
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control IGNEOUS
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 SILICIFICATION
    Type of Wallrock Alter. #2 CARBONATE SILIC
    Type of Wallrock Alter. #3 PYRITIZATION
    Strike And Dip N10E:60E
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 20000
    Date of Last Modification 780213

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1870
Mining method Open Stope
Year of first production 1892
Plant type Beneficiation (Mill)
Plant subcategory Flotation
Milling method Gravity

Mineral rights holdings

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

Land status

Ownership category State

Ownership information

  • Type Owner
    Owner Corporacion Mineria De Bolivia
    Interest 100
    Home office Bolivia
    Year 1975
  • Type Operator
    Owner Empressa Minera Quechisla
    Home office Bolivia
    Year 1975
  • Type Unknown
    Owner Corriente Resouces Inc (Owners Abve Not Mentioned In Art
    Year 1995
  • Type Unknown
    Owner Cameco Corp (Earn-In Agreement W/ Corriente)
    Year 1995

Reserves and resources

  • Type In-situ
    Estimate year 1992
    Total resources 92809mt ore
    Commodity Subtype Grade units Group Importance Year
    Tungsten Wo3 1.85 wt-pct Tungsten Major 1992
    Silver Ag 10 g/mt Silver 1992
    Gold Au 0.96 g/mt Gold 1992
  • Type In-situ
    Estimate year 1995
    Indicated 635000mt ore
    Demonstrated 635000mt ore
    Total resources 635000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tin Sn 0.3 wt-pct Tin 1995
    Tungsten Wo3 1.18 wt-pct Tungsten Major 1995
    Bismuth Bi 1.7 wt-pct Bismuth Major 1995
    Gold Au 1.5 g/mt Gold 1995
    Copper Cu 0.6 wt-pct Copper 1995

Comments on the reserve resource information

  • OTHER NAME: TASNA FORMERLY LISTED UNDER SEQ. NO. 3350009003A. ADDED FOR TUNGSTEN AT NO ADD. COST. OPERATOR: EMPRESA MINERA QUECHISLA. RESOURCES AS OF 1/83
  • 95% RECOVERY 25% DILUTION

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method BLOCK CAVING 10-79
    Percent Waste Rock 15
    Percent Recovery 95
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. TIMBER
    1st Condition of Workings OPEN
    Capacity 330
    Capacity Units MT ORE/DAY
    Unit Production Cost 23.62
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 3
    Year of Information 1982

Comments on other economic factors

  • TRANSPORTATION COSTS MILL TO SMELTER: $102/MT.

Reference information

Bibliographic references

  • Deposit

    NORTHERN MINER, FEB 27, 1995, P 1; MINING JOURNAL, JUN 16,

  • Deposit

    1995, P 441

  • Ownership

    MINING JOURNAL, JUN 16,1995, P 441

  • Reserve-Resource

    NORTHERN MINER, FEB 27, 1995, P 1

  • Reserve-Resource

    LAML TOPICAL SUPPLEMENT FOR NOV. 7, 1985. P 4.

  • Reserve-Resource

    COMPENDIUM OF THE ECONOMIC GEOLOGY OF BOLIVIA, 1992; PUB. BY

  • Reserve-Resource

    THE MINISTRY OF MINES AND METALLURGY, LA PAZ, BOLIVIA.

  • Deposit

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

  • Deposit

    MINERO DE BOLIVIA, LA PAZ, PG. 138-140, PRINTED IN BILBAO, S

  • Deposit

    IMPRENTA INDUSTRIAL S. A., IN SPANISH.

  • Deposit

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

  • Deposit

    MCGRAW HILL, N. Y., P.213

  • Deposit

    AHLFIELD,FREDERICK;LOS YACIMENTOS MINERALES Y HIDROCARBUROS

  • Deposit

    BOLIVIA;GEOBOL BUL.#5,PP.207-209,1964.

  • Deposit

    MATERIALS SURVEY OF TIN;J.C.RIDGE,PSU-DEPT.OF COMMERCE,1953

  • Deposit

    5,SECT.1,PP.25.

  • Deposit

    AHLFIELD,F.A.,DER WISTMUTBERG TASNA;ZEITSCHRIFT PRAKT.GEOL.,

  • Deposit

    PP.119-125.

  • Deposit

    ROSKILL INFORMATION SERVICES LTD., THE ECONOMICS OF TUNGSTEN

  • Deposit

    6'TH EDITION 1990. P 50.

Reporter information

Type Date Name Affiliation Comment
Reporter 08-APR-96 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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