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Pato Consolidated Dredging Co.

Producer in Antioquia, Colombia with commodities Gold, Silver, Platinum
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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. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Production statistics
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10068457
MRDS ID W001517
Record type Site
Current site name Pato Consolidated Dredging Co.
Alternate or previous names Pato-Bagre Placers, El Bagre Placers, El Bagre Alluvial Deposits, Workings Include: San Cayetano, La Gondola, Don Eduardo, Castano Grande

Geographic coordinates

Geographic coordinates: -74.79969, 7.6012 (WGS84)
Elevation 100
Location accuracy 2000(meters)
Relative position 13 KM ENE OF ZARAGOZA, DEPARTMENT OF ANTIOQUIA

Site location context

Political divisions (FIPS codes)

Antioquia(province)

Colombia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Colombia Antioquia

Comments on the location information

  • ON NECHI RIVER NEAR ZARAGOZA.

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Platinum Critical Secondary

Comments on the commodity information

  • GOLD FINING CHEMICALLY AND GRANUMETRICALLY DOWNSTREAM

Materials information

Materials Type of material
Gold Ore

Analytical data

Result ORIGINALLY VERY RICH PLACERS UPSTREAM, BUT NOW APPROACHING 0.12 CENTS (US) PER CUBIC YARD. AU-PT RATIO GREATER THAN 10,000:1

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 Associated
    Rock type Plutonic Rock > Granitoid > Tonalite
    Rock unit name Antioquian Batholith & Its Satellites;
    Rock description Antioquian Batholith & Its Satellites;
    Stratigraphic age (youngest) Holocene
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Unconsolidated Deposit > Alluvium

Nearby scientific data

(1) -74.79969, 7.6012
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Reg.Struct: N-S Foliated Precambrian And Paleozoic Metamorphic Basement. Reg.Trends: N-S Folding, Intrusion, Faulting.

Ore body information

  • General form SLIGHTLY MEANDERING FLOOD PLAIN
    Thickness 90M
    Length 25000M
    Width 300M
    Depth to top 25M
    Depth to bottom 30M

Controls for ore emplacement

  • Break In Gradient(High To Low)Of Longitudinal Profile Of Nechi River.

Comments on the geologic information

  • GOLD COMES FROM DEPOSITS IN ZARAGOZA AND SEGOVIA ZONES WHICH ARE RELATED TO THE JURASSIC QUARTZ DIORITE MAGMAS WHICH INTRUDED THE PREC METAMORPHICS. DEPOSITS OCCUR IN HIGH AND LOW TERRACES AND RECENT ALLUVIUM.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 0
Discoverer Indigenous Natives
Year of first production 0

Mining district

District name El Bagre, Pato District

Ownership information

  • Type Owner-Operator
    Owner Pato Gold Mines Ltd (British)
    Last year 1913
  • Type Owner-Operator
    Owner Pato Consolidated Gold Dredging Ltd (Canadian)
    Last year 1934
  • Type Owner-Operator
    Owner International Minerals Corp.

Production statistics

  • Year 1944
    Material ?
    Description Ap_Grade: ^0.004 Oz Au/Cy
  • Year 1944
    Material ?
    Description Ap_Grade: ^0.0089 Oz/Cy

Comments on the production information

  • OZ CALCULATED FROM $20.67 PER OZ FOR AN ESTIMATED 50 MILLION DOLLARS IN GOLD.

Comments on the reserve resource information

  • COMPANY HAS INVESTIGATED POSSIBILITIES FOR BURIED PAY STREAKS IN SURROUNDING VALLEY FILL WITHOUT SUCCESS.
  • AU BECOMING EXTREMELY FINE AS DREDGES PROCEDE DOWNSTREAM, ALSO INCREASINGLY ENTANGLED WITH CLAY AS DEPOSITS"FINE"DOWNSTREAM.
  • NO RESERVE ESTIMATES BUT GRADES ARE BETTER THAN 0.5 G/CUBIC M. AU COMBINED DREDGE AND HYDRALICKING; AU (2), ORE (2) FROM DREDGING; AU (3), ORE (3) FROM HYDRAULICKING.

Comments on the workings information

  • DREDGING OPERATION. FOUR 13 1/2 CU. FT. DREDGES PRESENTLY OPERATING (1972), EXCAVATING TO DEPTHS OF 90 FT. BELOW WATER LEVEL. DREDGING BEGAN IN 1913.

Comments on development

  • ECON.COM: IMPOVERISHMENT OF VALUES DOWNSTREAM, AND INCREASING OVERBURDEN AND DEPTH TO PAY STREAK.

Reference information

Bibliographic references

  • Deposit

    GEOLOGIC MAP OF EASTERN ANTIOQUIA BY T. FEININGER, D. BARRERO, O. RAMIREZ, AND OTHERS, 1969

  • Deposit

    INSTITUTO INTERNACIONAL DE INTEGRACION, 1986, GEOGRAFIA ECONOMICA; AREA DE RECURSOS MINERALES: LA PAZ, INSTITUTO INTERNACIONAL DE INTEGRACION, 716 P.

  • Deposit

    ELEVATORSKI, E.A., 1988, WORLD GOLD; MINES-DEPOSITS, DISCOVERIES; VOL. I: NORTH, CENTRAL, AND SOUTH AMERICA: MINOBRAS MINING SERVICES, 156 P.

  • Deposit

    HALL, R., ET AL, 1970, RECURSOS MINERALES DE PARTE DE ANTIOQUIA Y CALDAS, BOL. GEOL. INGEOMINAS, V. 18, NO. 2, BOGOTA.

  • Deposit

    INGEOMINAS, 1987, RECURSOS MINERALES DE COLOMBIA, 2ND ED., PUBL. GEOL. ESP. NO. 1, 564 P., BOGOTA.

  • Deposit

    JURADO, V.M., 1983, CATALOGO DE LOS YACIMIENTOS, PROSPECTOS Y MANIFESTACIONES MINERALES DE COLOMBIA, PUB. GEOL. ESP. INGEOMINAS NO. 13, 462 P., BOGOTA.

  • Deposit

    RODRIGUEZ, C., AND PERNETT, A., 1980, MAPA DE RECURSOS MINERALES DEL DEPARTMENTO DE ANTIOQUIA, ESCALA 1:500,000, INGEOMINAS, BOGOTA.

  • Deposit

    RODRIGUEZ, C., AND PERNETT, A., 1983, RECURSOS MINERALES DE ANTIOQUIA, BOL. GEOL. INGEOMINAS, V. 26, NO. 3, 116 P., BOGOTA.

  • Deposit

    SINGEWALD, Q.D., 1950, MINERAL RESOURCES OF COLOMBIA (OTHER THAN PETROLEUM): U.S. GEOLOGICAL SURVEY BULLETIN 964-B, P. 53-204.

  • Deposit

    1950 COMPILE SINGEWALD, Q., USGS BULL. 964-B

  • Deposit

    1960 COMPILE WOKITTEL, R., N.G.S., TOMO X

  • Deposit

    PRIVATE REPORTS OF INTERNATIONAL MINERALS CORPORATION, N.Y.(MR. PATRICK H. O'NEAL, V.P.).

  • Deposit

    1971 COMPILE HALL, R.B., INGEOMINAS, BOL. GEOL.V19

  • Production

    SINGEWALD (1950).

  • Reserve-Resource

    INSTITUTO INTERNACIONAL DE INTEGRACION, 1986, P. 137. SINGEWALD (1950).

General comments

Subject category Comment text
Deposit First Production Year: PRE-HISTORIC, SPANISH MINING, 1957; DREDGING BEGAN IN 1883
Deposit 57% OF THE NATIONAL GOLD PRODUCTION IN 1984. ; INFO.SRC : 1 PUB LIT
Deposit GOLD VALUES OBVIOUSLY DEPOSITED AT BREAK IN GRADIENT WHERE NECHI AND PORCE RIVERS OF HIGH GRADIENTS IN MOUNTAINOUS TERRAIN ISSUE UPON FLAT PLAINS DOWNSTREAM, NEAR ZARAGOZA . DEPTH TO TOP RANGES FROM 10 TO 25 M. WIDTH VARIES FROM 200 TO 300 M. DEPTH TO BOTTOM RANGES FROM 12 TO 30 M.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1973 Irving, Earl M. U.S. Geological Survey
Updater 01-JUN-1991 Bolm, Karen S. U.S. Geological Survey
Updater 01-NOV-1992 Learned, Robert U.S. Geological Survey
Updater 01-SEP-1994 Page, Norman J. U.S. Geological Survey

Beyond USGS

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

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