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Cerro Hamaca

Past Producer in Tolima, Colombia with commodities Gold, Silver
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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. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10099623
MRDS ID TC42864
Record type Site
Current site name Cerro Hamaca

Geographic coordinates

Geographic coordinates: -75.14331, 3.88861 (WGS84)
Elevation 370
Location accuracy 2000(meters)
Relative position 10.5 KM NE OF THE TOWN OF COYAIMA.

Site location context

Political divisions (FIPS codes)

Tolima(province)

Colombia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Colombia Tolima

Comments on the location information

  • LOCATED IN THE VILLAGE OF SANTA MARTA, NEAR THE HAMACA STREAM.

Commodities

Commodity Importance
Gold Primary
Silver Primary

Materials information

Materials Type of material
Gold Ore

Analytical data

Result A GOLD PAN ASSAY SHOWED THAT THERE IS AN ABUNDANCE OF OTHER HEAVY MINERALS PRESENT IN THE ALLUVIUM.

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Alluvium
    Stratigraphic age (youngest) Pliocene

Nearby scientific data

(1) -75.14331, 3.88861
ListMap

Economic information

Comments on the geologic information

  • TERTIARY CLAYSTONES, SANDSTONES, AND CONGLOMERATES ARE OVERLAIN BY A RECENT ALLUVIAL FAN.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Production years 1934-1949 (ABANDONED DUE TO VIOLENCE IN THE REGION).

Comments on the production information

  • WHEN THE ORIGINAL OPEN PIT WAS BEING WORKED, 1-1.5 LBS/WEEK OF AU WAS PRODUCED.

Comments on the workings information

  • THE MINE WAS ORIGINALLY WORKED AS AN OPEN PIT, APPROXIMATELY 1 SQ KM IN AREA, BUT WAS LATER WORKED LESS INTENSELY THROUGH A SYSTEM OF SMALLER PITS. THE ALLUVIAL DEPOSIT HAS ONLY BEEN WORKED THROUGH APPROXIMATELY 15% OF THE TOTAL EXTENT. THE OLD OPEN PIT AND SMALLER PITS ARE NOW ALL PARTIALLY BURIED.

Reference information

Bibliographic references

  • Deposit

    BUITRAGO R., C., BUENAVENTURA A., J.A., AND VESGA O., C.J., 1974, OCURRENCIAS MINERALES EN EL DEPARTAMENTO DEL TOLIMA: MINISTERIO DE MINAS Y ENERGIA, REPUBLICA DEL COLOMBIA. SCALE 1:250,000.

  • Deposit

    BUENAVENTURA, J.A., 1975, OCURRENCIAS MINERALES EN LA REGION NORTE DEL TOLIMA. INF. 1688, INGEOMINAS, BOGOTA.

  • Other Database

    CIMRI

  • Production

    BUENAVENTURA (1975).

General comments

Subject category Comment text
Deposit BUENAVENTURA (1975) REPORTS THAT THE PLACER IS HAS GOOD ECONOMIC PERSPECTIVES, DUE TO THE EXTENT OF THE DEPOSIT, AND ITS GOLD CONTENT. MORE EXPLORATION IS RECOMMENDED.
Deposit ALLUVIUM DEPOSIT EXTENDS OVER APPROX. 18 SQ. KM AND IS 8 M THICK. THE PLACER DEPOSIT IS AN ALLUVIAL CONGLOMERATE WHICH CONSISTS OF IGNEOUS AND SEDIMENTARY CLASTS ENCASED IN A CLAYEY MATRIX WHERE GOLD FLAKES AND NUGGETS ARE FOUND.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1995 Wells, Tina M. U.S. Geological Survey

Beyond USGS

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

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