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  3. Mineral Resource Data System (MRDS)

Gold Placers of Choco Department

Producer in Choco, Colombia with commodities Gold, Platinum, 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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10068458
MRDS ID W001519
Record type Site
Current site name Gold Placers of Choco Department

Geographic coordinates

Geographic coordinates: -76.64974, 5.7013 (WGS84)
Elevation 250
Relative position BELT 200 MILES LONG ALONG WEST FLANK OF WESTERN CORDILLERA, WITH QUIBDO NEAR CENTER

Site location context

Political divisions (FIPS codes)

Choco(province)

Colombia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Colombia Choco

Comments on the location information

  • DREDGING AREAS BELOW 100 METERS, WITH HAND-PANNING TO HEADWATERS OF TRIBUTARIES

Commodities

Commodity Importance
Gold Primary
Platinum Critical Primary
Silver Secondary

Materials information

Materials Type of material
Gold Ore
Platinum Ore

Alteration

  • (Local) Deep Tropical Weathering

Analytical data

Result GOLD VARIES BETWEEN 860 AND 920 IN FINENESS

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Hypabyssal Calcalkaline Intrusives
    Rock description Hypabyssal Calcalkaline Intrusives
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic)
    Rock unit name Alluvium;Sedimentary Rocks;Eugeosynclinal Mafic Volcanics, Sed Rocks
    Rock description Alluvium;Sedimentary Rocks;Eugeosynclinal Mafic Volcanics, Sed Rocks

Nearby scientific data

(1) -76.64974, 5.7013
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description North-South Western Cordillera, Fold Axes, Faulting, Intrusion

Ore body information

  • General form STREAM
    Thickness 3M
    Width 800M
    Depth to top 0M

Controls for ore emplacement

  • Fluvial Concentration Of Heavy Minerals To Form Paystreaks

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 0
Discoverer Aborigines
Production years PREHISTORIC TO PRESENT

Mining district

District name Upper San Juan-Atrato Rivers District

Ownership information

  • Type Operator
    Owner Various; Choco-Pacifico Mining Co.
  • Type Owner
    Owner Various, Choco-Pacifico Mining Co. Holds Large Concession Areas.

Comments on the production information

  • CHOCO REGION HAS BEEN SECOND IMPORTANT PRODUCING REGION OF COLOMBIA SINCE PREHISTORIC TIME. FROM 1934 TO 1964, AVERAGE, PRODUCTION WAS ABOUT 50,000 TOZ ANNUALLY, SINCE WHICH PRODUCTION HAS DECLINED TO ABOUT 30,000 TOZ ANNUALLY . CUMULATIVE PROD. ESTIMATED SINCE 1540.

Comments on the reserve resource information

  • NOT QUANTIFIABLE. SOME LARGER TRIBUTARIES OF MIDDLE ATRATO AND MIDDLE SAN JUAN RIVERS COULD BECOME ECONOMICAL FOR DREDGING WITH INCREASING METAL PRICES.

Workings at the site

  • Type of workings Surface
    Length 50000M
    Overall depth 30M

Comments on the workings information

  • EXTENSIVE DREDGING ALONG SAN JUAN RIVER AND ITS LEFT BANK TRIBUTARIES, MAINLY PRIMITIVE HAND-PANNING ELSEWHERE.

Comments on development

  • IN ADDITION THOUSANDS OF NATIVES HAND PAN IN SMALL HEADWATER TRIBUTARY STREAMS FOR LIVLIHOOD. PRINCIPAL PRODUCTION FROM RIGHT BANK TRIBUTARIES OF ATRATO RIVER AND LEFT BANK TRIBUTARIES OF SAN JUAN RIVER, AND BAUDO RIVER. ; ECON.COM: TENOR, METAL PRICES, DREDGABILITY IN LOWER AREAS, LAND OWNERSHIP, AND LOCAL POLITICS

Reference information

Bibliographic references

  • Deposit

    WOKITTEL, R., 1961 GEOLOGIA ECONOMICO DEL CHOCO, COLOMBIA BOL. GEOL. V.7, P. 119-162

  • Deposit

    1961 COMPILE WOKITTEL, R., NAT. GEOL. SURV. OF COLOMBIA.

  • Deposit

    INTERNATIONAL MINING CORPORATION, NEW YORK.

  • Production

    SPANISH ARCHIVES, WOKITTAL(1961)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1973 Irving, Earl 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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