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  3. Mineral Resource Data System (MRDS)

San Isidro

Producer in Bolivar, Venezuela with commodity Iron
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Nearby scientific data
  7. Economic information about the deposit and operations
  8. Ownership information
  9. Production statistics
  10. Reserves and resources
  11. Workings at the site
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10133370
MAS/MILS ID 3070130014
Record type Site
Current site name San Isidro

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -63.19941, 7.30151 (WGS84)
Elevation 600
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Bolivar(province)

Venezuela(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Venezuela Bolivar

Commodities

Commodity Importance
Iron Primary

Nearby scientific data

Ore Body (1) -63.19941, 7.30151
ListMap

Economic information

Comments on the geologic information

  • ALL VENEZUELAN IRON DEPOSITS OCCUR IN THE IGNEOUS AND METAMORPHIC ROCKS OF THE GUYANA SHIELD AND SPECIFICALLY THE IMATACA FORMATION, WHICH CONSISTS OF GNEISSES, SCHISTS, FINE-GRAINED LAKE SUPERIOR TYPE TACONITES (IN FERRUGINOUS QUARTZITES), AND BRAZILIAN ITABIRITE IRON ORE. THE LATTER HAVE FORMED RICH IRON DEPOSITS THROUGH SECONDARY ENRICHMENT PROCESSES. EMPTY SPACES WERE FORMED THROUGH LEACHING OF THE SILICA, AND WERE THEN REFILLED WITH IRON HYDROXIDES. AFTER FORMATION OF THIS TYPE OF ORE, WEATHERING CAUSED THE SURFACE FORMATION OF A VERY STRONG, HARD LAYER, TERMED THE "CRUST", COVERING THE FINES(TACONITE) AND RANGING IN THICKNESS FROM 1 TO 50 M. THE CRUST IS RICH IN HEMATITE AND CONSTITUTES THE PRINCIPAL ORES, WHICH OCCUR IN CONJUNCTION WITH THE CANGAS (IRON BRECCIAS), WHICH ARE HIGH IN SILICA AND ALUMINA.

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Metallic
Significant Yes
Year of first production 1965

Ownership information

  • Type Owner-Operator
    Owner Cvg Ferrominera Orinoco (Government)
    Interest 100
    Home office Venezuela
    Year 1981

Production statistics

  • Year 1979
    Description Sinter,Lump 899999 Mt/Yr Concentrates

Reserves and resources

  • Type In-situ
    Estimate year 1981
    Indicated 392000000mt ore
    Demonstrated 392000000mt ore
    Total resources 392000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 65 wt-pct Iron Major 1981
    Iron Fe 65 wt-pct Iron Major 1981
    Iron Fe 65 wt-pct Iron Major 1981

Comments on the reserve resource information

  • METAL BULL SAYS THIS HAS PROVEN RESERVES OF HIGH GRADE ORE TOTALING 395 MILLION M.T.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OPEN PIT
    Percent Waste Rock 23
    Avg. Bench Height (meters) 15
    Max. Pit Slope (degrees) 45
    Capacity 50000
    Capacity Units MT ORE/DAY
    Unit Production Cost 1.95
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 2
    Year of Information 1981

Comments on other economic factors

  • FINAL PRODUCT DISTRIBUTION IS AS FOLLOWS: EUROPE 54%, DOMESTIC 24%, USA 20% AND LATIN AMERICA 2%.

Reference information

Bibliographic references

  • Deposit

    MINING MAGAZINE. IRON MINING IN VENEZUELA. JULY, 1981,

  • Deposit

    PP. 18-25.

  • Deposit

    ENGINEERING AND MINING JOURNAL. VENEZUELA: A BOOMING SCENE.

  • Deposit

    NOV. 1977, PP. 63-69.

  • Deposit

    ARGALL, G. O., JR. FERROMINERA ORINOCO MAXIMIZES IRON MINES

  • Deposit

    TO MEET NEW ORE DEMANDS. WORLD MINING. MARCH 1977,

  • Deposit

    PP. 51-54.

  • Deposit

    MINING MAGAZINE. CVG: USING VENEZUELAN NATURAL RESOURCES.

  • Deposit

    JULY 1981, PP. 34-37.

  • Deposit

    MINISTRY OF MINES, CARACAS, VENEZUELA. MONTHLY BULLETIN.

  • Deposit

    V. 9, NO. 5, MAY 1976, PP. 16-24.

  • Deposit

    UNITED NATIONS. SURVEY OF WORLD IRON RESOURCES. 1970.

  • Deposit

    RUCKNICK, J. C. THE IRON ORES OF CERRO BOLIVAR. ECON. GEOL.

  • Deposit

    V. 58, JUNE 25, 1975, PP. 218-236.

General comments

Subject category Comment text
Deposit DEPOSIT DEMENSIONS ARE ESTIMATED AT: LENGTH- 1200M, WIDTH- 500M, AND DEPTH- 140 M. AT THE LOCATION. THE PROPERTY PRODUCED FROM 1954 TO 1979, AND WAS REOPENED IN SEPT. 1984 AT A REPORTED CAPACITY OF 4.8 MILLION MT/YR.

Reporter information

Type Date Name Affiliation Comment
Reporter 17-JUL-86 Bolis U.S. Bureau of Mines

Beyond USGS

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

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