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Milluni Mine

Past Producer in La Paz, Bolivia with commodities Tin, Molybdenum, Copper, Zinc, Lead, Tungsten, Lithium
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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. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Production statistics
  17. Reserves and resources
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10006203
MRDS ID BL20163
Record type Site
Current site name Milluni Mine
Alternate or previous names Fabulosa, Union, Huayna, Esperanza, San Alberto, Carmen, Santa Rosa. Veins: Rothschild, Compania, Salvadora

Geographic coordinates

Geographic coordinates: -68.14645, -16.3152 (WGS84)
Elevation 4640
Relative position ON EAST SIDE OF TOWN OF MILLUNI

Site location context

Political divisions (FIPS codes)

La Paz(province)

Bolivia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Bolivia La Paz
Bolivia La Paz

Comments on the location information

  • TWO MINE GROUPS, MILLUNI AND UNION (ALSO KNOWN AS CUADRO AND COMPANIA), SEPARATED BY THE CUARZO FAULT, EACH WITH A MILL COVERING 6000 ACRES IN AREA TOTAL.

Commodities

Commodity Importance
Tin Critical Primary
Molybdenum Tertiary
Copper Tertiary
Zinc Critical Tertiary
Lead Tertiary
Tungsten Critical Tertiary
Lithium Critical Tertiary

Materials information

Materials Type of material
Cassiterite Ore
Chalcopyrite Ore
Galena Ore
Huebnerite Ore
Lithiophilite Ore
Molybdenite Ore
Sphalerite Ore
Stannite Ore
Triphylite Ore
Wolframite Ore
Apatite Gangue
Chlorite Gangue
Feldspar Gangue
Garnet Gangue
Lazulite Gangue
Magnetite Gangue
Marcasite Gangue
Muscovite Gangue
Pyrite Gangue
Pyrrhotite Gangue
Quartz Gangue
Siderite Gangue
Tourmaline Gangue

Alteration

  • (Local) Contact Metamorphism Of Shale; Greisen

Mineral occurrence model information

Model code 49
USGS model code 15c
Deposit model name Sn greisen

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Huayna Potosi Batholith
    Rock description Huayna Potosi Batholith
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Silurian
    Stratigraphic age (youngest) Late Silurian
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
  • Host or associated Host
    Rock type Metamorphic Rock > Phyllite
    Rock unit name Catavi
    Rock description Catavi

Nearby scientific data

(1) -68.14645, -16.3152
ListMap

Economic information

Ore body information

  • General form TABULAR
    Strike N 10 W-N 10 E; N 30 W
    Dip 60-65 NE/SE;
  • General form TABULAR
    Dip 60-65 NE/SE;

Controls for ore emplacement

  • Inverse Fault

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Year of first production 1912
Year of last production 1980

Mining district

District name Fabulosa

Ownership information

  • Type Operator
    Owner Cia. Huayna-Potosi Y Milluni S.A. Fabulosa Consolidated Mines ) Cooperativa 16
    First year 1912
    Last year 1921
  • Type Owner
    Owner Cia. Huayna-Potosi Y Milluni S.A. Fabulosa Mines Consolidated ) Compania Minera
    First year 1912
    Last year 1921

Production statistics

  • Year 1981
    Accuracy Estimate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Tin Tin 1wt-pct

Comments on the production information

  • LITTLE OR NO PRODUCTION 1924-1926 DUE TO LITIGATION.

Reserves and resources

  • Type In-situ
    Estimate year 1980
    Total resources 2000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tin Sn 0.42 wt-pct Tin Major 1980
  • Type In-situ
    Estimate year 1922
    Total resources 287500000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tin Sn 5 wt-pct Tin Major 1922
  • Type In-situ
    Estimate year 1925
    Total resources 9000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tin Sn 3 wt-pct Tin Major 1925
  • Type In-situ
    Estimate year 1960
    Commodity Subtype Grade units Group Importance Year
    Tin Sn 2.18 wt-pct Tin Major 1960
  • Type In-situ
    Estimate year 1981
    Total resources 858000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tin Sn 1.6 wt-pct Tin Major 1981
  • Type In-situ
    Estimate year 1909
    Total resources 6000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tin Sn 3 wt-pct Tin Major 1909

Comments on the reserve resource information

  • (2) BLOCKED OUT RESERVE INCLUDED IN ITEM 2 UNDER POTENTIAL RESOURCES; (5) POSITIVE, PROBABLE, POSSIBLE, AND PROSPECTIVE RESREVES; (6) ORE IN SIGHT

Workings at the site

  • Type of workings Underground
    Length 26000M
    Overall depth 610M
    Overall length 2240.28M

Comments on the workings information

  • WORKINGS AS OF 1922 DESCRIBED AS 60 TUNNELS UP TO 490 M LONG WITH A TOTAL OF 26,000 M WORKINGS TO 610 M DEPTH IN BOTH MINE GROUPS. ACCORDING TO SUGAKI AND OTHERS (1985) MINE IS DEVELOPED FROM +45 M TO -167 M LEVELS.

Comments on development

  • ECON.YEAR: 1980 ; ECON.COM: THE ONLY MINE IN BOLIVIA WHICH PRODUCED STANNITE CONCENTRATES. TWO MILLS, MILLUNI AND UNION. EACH HAD A CAPCITY OF 70 TPD IN 1922 AND 100 TPD IN 1930. IN 1979 WAS MILLING BY GRAVITY AND FLOATATION 8500 MT/MO ORE CONTAINING 0.85 TO 0.90% SN, YIELDING 150 MT/MO CONCENTRATES CONTAINING 50% SN. ; MILL.CAP : 2400

Reference information

Bibliographic references

  • Deposit

    AHLFELD, F., AND SCHNEIDER-SCHERBINA, A., 1964, LOS YACIMIENTOS MINERALES Y DE HIDROCARBUROS DE BOLIVIA: DEPARTAMENTO NACIONAL DE GEOLOGIA (BOLIVIA) BOLETIN NO. 5 (ESPECIAL), P. 134.

  • Deposit

    LEHMAN, B., 1979, SCHICHTGEBUNDE SN-LAGERSTATTEN IN DER CORDILLERA REAL/BOLIVIEN: BERLINER GEOWISSENSCHAFTEN ABHANDLUNGEN, REIHE A, N. 14, 135 P.

  • Deposit

    GUSTAVSON ASSOC., 1992, COMPENDIUM OF THE ECONOMIC GEOLOGY OF BOLIVIA

  • Deposit

    SUGAKI, A., AND OTHERS, 1985, GEOLOGICAL STUDY ON THE ORE DEPOSITS IN THE LA PZ DISTRICT, BOLIVIA: SCIENCE REPORTS OF THE TOHOKU UNIVERSITY, SERIES 3, V. 16, N. 2, P. 131-198.

  • Other Database

    CIMRI

  • Production

    (1) GEOBOL FILES; (2-5) THAYER LINDSLEY FILES; MINES HANDBOOK V. 16, P. 2282, V. 18, P. 2813. ALSO GUSTAVSON ASSOC. (1992)

General comments

Subject category Comment text
Deposit ERRATIC CASSITERITE-STANNITE MINERALIZATION IN PEGMATITE VEINS 1 TO 3 M WIDE WITH QUARTZ CORES, OUTER PEGMATITE ZONE, AND GREISEN SELVAGES OF TOURMALINE, ANDALUSITE, AND GARNET. TIN ALSO FOUND IN QUARTZ-MUSCOVITE-STANNITE-HUEBNERITE VEINS THAT LACK PEGMATITE MINERALS SUCH AS FELDSPAR AND LITHIUM PHOSPHATES. MAIN VEIN IS THE ROTHSCHILD VEIN (N10E-N10W 60-65NE/SE), 1500 M LONG, 50 TO 150 CM WIDE, AND OPENED TO 170 M DEPTH.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1991 Cuiza, Juan Servicio Geologic de Bolivia
Updater 01-NOV-1993 Long, Keith R. U.S. Geological Survey

Beyond USGS

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

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