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San Josema Mine

Past Producer in Santa Cruz, Bolivia with commodities Beryllium, Tantalum, Mica
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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. Economic information about the deposit and operations
  13. Mining district
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10006735
MRDS ID BL30325
Record type Site
Current site name San Josema Mine

Geographic coordinates

Geographic coordinates: -60.66266, -16.50685 (WGS84)
Location accuracy 250(meters)
Relative position 38 KM N55E OF SAN MIGUEL.

Site location context

Political divisions (FIPS codes)

Santa Cruz(province)

Bolivia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Bolivia Santa Cruz

Commodities

Commodity Importance
Beryllium Critical Primary
Tantalum Critical Primary
Mica Primary

Materials information

Materials Type of material
Beryl Ore
Muscovite Ore
Tantalite Ore
Feldspar Gangue
Quartz Gangue

Alteration

  • (Local) Feldspar Kaolinized.

Mineral occurrence model information

Model code 33
USGS model code 13a
Deposit model name Be-Li pegmatites

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Schist
    Rock unit name Motacu Formation, San Ignacio Group
    Rock description Motacu Formation, San Ignacio Gp
    Stratigraphic age (youngest) Mesoproterozoic
    Stratigraphic age (youngest) Mesoproterozoic
    Stratigraphic age (youngest) Mesoproterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite

Nearby scientific data

(1) -60.66266, -16.50685
ListMap

Economic information

Ore body information

  • General form LENTICULAR
    Length 150M
    Width 50M

Comments on the geologic information

  • DEPOSIT COVERED BY 0.1 TO 1.5 M OF RED LATOSOL.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Significant No

Mining district

District name Los Patos

Comments on the production information

  • PROBABLY WORKED FOR MUSCOVITE IN 18TH CENTURY. SINCE 1970 DUMPS HAVE BEEN REWORKED FOR TANTALITE.

Workings at the site

  • Type of workings Surface
    Overall depth 4M

Comments on the workings information

  • NUMEROUS IRREGULAR PITS UP TO 4 M DEEP.

Reference information

Bibliographic references

  • Deposit

    LITHERLAND, M. AND OTHERS, 1986, THE GEOLOGY AND MINERAL RESOURCES OF THE BOLIVIAN PRECAMBRIAN SHIELD: BRITISH GEOLOGICAL SURVEY OVERSEAS MEMOIR 9, 153P.

  • Deposit

    LITHERLAND, M. AND OTHERS, 1981, THE NATURAL ENVIRONMENTAL RESEARCH COUNCIL, UNITED KINGDOM, AND SERVICIO GEOLOGICO DE BOLIVIA, 1:250,000.

  • Other Database

    CIMRI

  • Production

    LITHERLAND ET.AL. (1981), P. 118.

General comments

Subject category Comment text
Deposit BERYL OCCURS AS CRYSTALS GENERALLY UP TO 30 CM LONG, WITH EXCEPTIONAL CRYSTALS 3 M LONG. MUSCOVITE OCCURS AS BOOKS UP TO 15 CM IN DIAMETER. TANTALITE IS VERY RARE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-94 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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