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Rio Esmoraca Placer Mines

Past Producer in Potosi, Bolivia with commodity Gold
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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. Economic information about the deposit and operations
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10097754
MRDS ID BL30080
Record type Site
Current site name Rio Esmoraca Placer Mines

Geographic coordinates

Geographic coordinates: -66.24945, -21.71422 (WGS84)
Elevation 3300
Relative position 3 KM N45E OF ESMOROCO; 80 KM OF VILLAZON.

Site location context

Political divisions (FIPS codes)

Potosi(province)

Bolivia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Bolivia Potosi
Bolivia Potosi

Comments on the location information

  • THE OSMORACA RIVER IS A TRIBUTARY OF THE SAN JUAN DE ORO RIVER.

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Mineral occurrence model information

Model code 119
USGS model code 39a
Deposit model name Placer Au-PGE
Mark3 model number 54

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel
    Stratigraphic age (youngest) Holocene
  • Host or associated Host
    Rock type Unconsolidated Deposit > Sand and Gravel

Nearby scientific data

(1) -66.24945, -21.71422
ListMap

Economic information

Comments on the geologic information

  • THE HEADWATERS OF THE ESMORACA DRAIN THE ESMORACA MASSIF WHICH IS A TERTIARY VOLCANIC CENTER.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Comments on the reserve resource information

  • THE AVERAGE DEPTH OF BEDROCK IS 4.27 M. THE AVERAGE GOLD GRADE IS 94 MG/CUBIC METER, AND A VOLUME OF 4.6 MILLION CUBIC METERS IS ESTIMATED.

Comments on the workings information

  • AT EITHER SIDE OF THE VALLLEY ARE REMNANTS OF SEVERAL LEVELS OF RIVER TERRACES, THE HIGHEST OF THESE IS 30 TO 35 M ABOVE THE PRESENT RIVER LEVEL. ALL TERRACES HAVE BEEN WORKED.

Reference information

Bibliographic references

  • Deposit

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

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit THE AREA PRODUCED SMALL AMOUNTS OF GOLD, BISMUTH AND TUNGSTEN. THE PRESENT RIVER COURSE LIES IN A GRAVEL PLAIN 100 TO 300 M WIDE. TERRACE GRAVELS ARE COARSE-GRAINED SUB- ANGULAR TO WELL ROUNDED AND CONTAIN BLOCKS MORE THAN 0.5 M ACROSS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1994 Blacutt, William U.S. Geological Survey

Beyond USGS

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

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