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Irma Mine

Past Producer in Potosi, Bolivia with commodities Silver, Lead, Zinc, Copper
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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. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Production statistics
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10006486
MRDS ID BL30022
Record type Site
Current site name Irma Mine
Alternate or previous names Tesoro De Los Pobres

Geographic coordinates

Geographic coordinates: -68.3648, -16.48937 (WGS84)
Elevation 4280
Relative position 0.5 KM N75E OF UBINA.

Site location context

Political divisions (FIPS codes)

Potosi(province)

Bolivia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Bolivia Potosi
Bolivia Potosi

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Secondary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Sphalerite Ore
Barite Gangue
Limonite Gangue
Pyrite Gangue

Mineral occurrence model information

Model code 77
USGS model code 20b
Deposit model name Sn-polymetallic vein

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Miocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -68.3648, -16.48937
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description On W Flank Of N-S Anticline.

Ore body information

  • Strike N50-65E
    Dip 75SE

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Production years 1951-1952

Mining district

District name Ubina

Ownership information

  • Type Operator
    Owner Lessees
    First year 1951
    Last year 1952
  • Type Owner
    Owner Hochschild (Comibol )
    First year 1952
    Last year 1952

Production statistics

  • Year 1952
    Period 1951-1952
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Zinc Zinc 0wt-pct
    Major Ore Lead Lead 27wt-pct
    Major Ore Silver Silver 508g/mt

Comments on the production information

  • (1) HAND SORTED ORE TREATED AT PULACAYO.

Comments on the reserve resource information

  • POTENTIAL RESERVE FOR UBINA-IRMA ZONE IS 10 TO 135 MILLION MT. SAMPLING OVER 0.10 TO 0.52 M WIDTHS AT THE IRMA MINE YIELD ASSAYS OF 0.027 TO 10.60% AG, 2.59 TO 24.30% PB, 0.49 TO 4.30% ZN. GOLD WAS NOT ASSAYED FOR.

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 50M

Comments on the workings information

  • THREE ADITS FOLLOW A DISCONTINUOUS VEIN 0.10 TO 0.25 M WIDE OVER A VERTICAL INTERVAL OF 50 M . WORKINGS NOW CAVED. PROSPECT PITS AND TRENCHES AT SURFACE.

Comments on development

  • NO EXPLORATION OR PRODUCTION SINCE NATIONALIZED IN 1952, OTHER THAN BRIEF SITE EXAMINATIONS.

Reference information

Bibliographic references

  • Deposit

    PINTO V., J., 1988, MODELO CONCEPTUAL Y EVALUACION DEL POTENCIAL MINERAL DE LOS YACIMIENTOS DE METALES PRECIOSOS DE LA REGION UBINA, POTOSI, BOLIVIA: UNITED NATIONS DEVELOPMENT PROGRAM, PROJECT BOL/87/12, 22 P

  • Other Database

    CIMRI

  • Production

    PINTO (1988) P. 10.

  • Reserve-Resource

    PINTO (1988) P 9.

General comments

Subject category Comment text
Deposit VEINS AND VEINLETS A FEW MM TO 0.25 M WIDE. LARGEST VEIN, 0.10-0.25 M WIDE, TRACEABLE 300 M AT SURFACE. MINE IS ON THE NORTHERN PART OF THE SAME STOCKWORK ZONE WORKED AT THE ADJACENT UBINA MINE.

Reporter information

Type Date Name Affiliation Comment
Reporter 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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