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Mutun Deposit

Past Producer in Santa Cruz, Bolivia with commodities Iron, Manganese
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Production statistics
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10068814
MRDS ID W002072
Record type Site
Current site name Mutun Deposit
Alternate or previous names Serra De Jacadigo, Morro De Jacadigo Brazil, Cerro Mutun, Fortin Mutun, Serrania De Mutun, Serrania De San Juan

Geographic coordinates

Geographic coordinates: -57.89926, -19.21425 (WGS84)
Elevation 500
Relative position IMMEDIATELY SOUTH AND SOUTHEAST OF MUTUN, 25 KM SOUTH OF PUERTO SUAREZ BY ROAD.

Site location context

Political divisions (FIPS codes)

Santa Cruz(province)

Bolivia(country)

South America(continent)

Land(continent)

Federal lands

Federal(land status)

Geographic areas

Country State
Bolivia Santa Cruz

Comments on the location information

  • DEPOSIT IS CONFINED TO A LOW (800 M) EROSIONAL REMNANT (MESA) THAT STRADDLES THE BOLIVIA-BRAZIL BORDER.

Commodities

Commodity Importance
Iron Primary
Manganese Critical Tertiary

Comments on the commodity information

  • IRON ORES HAVE HIGH P CONTENTS. MN ORES SUITABLE FOR STEEL PRODUCTION BUT NOT FOR DRY BATTERY MANUFACTURE.

Materials information

Materials Type of material
Goethite Ore
Hausmannite Ore
Hematite Ore

Alteration

  • (Local) Low-Grade Metamorphism Altered Cryptomelane To Hausmannite; Weathered To Canga.

Analytical data

Result FE ORES CONTAIN 52-58% FE
Result 13 TO 22% SIO2
Result 0.06-0.1% S
Result 0.01% P
Result 1-2% H2O. MN ORES CONTAIN AVERAGE OF 3.1% SIO2 AND 0.15% P AND CONTAIN APPRECIABLE BA AND K.

Mineral occurrence model information

Model code 241
USGS model code 34a
Deposit model name Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Rock unit name Santa Cruz Formation (Jacadigo Group)
    Rock description Santa Cruz Formation (Jacadigo Gp)
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)

Nearby scientific data

(1) -57.89926, -19.21425
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Reg.Struct: Gentle Ne-Sw Folding, With Ne And Nw Faulting
Type of structure Local
Structure description Synclinal Erosional Remnants

Ore body information

  • General form BEDDED
    Strike FLAT LYING
    Dip FLAT
    Thickness 500M
    Length 14000M
    Width 6000M
    Depth to top 0M
    Depth to bottom 500M
  • General form BEDDED
    Dip FLAT

Controls for ore emplacement

  • Ice Shelf Facies (Fe Oxides). Off-Shelf Slope Facies (Mn-Oxides)

Comments on the geologic information

  • GEOL.COM: MN LENSES 20 M ABOVE BASE OF BAND' ALTA FORMATION WHICH CONTAINS HEMATITE ALTERNATING WITH HIGH SILICA LAYERS.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1894
Discoverer Evans (In Bolivia)
Year of first production 1971
Year of last production 1972
Production years 1971-1972

Mining district

District name Mutun (Bolivia) - Corumba (Brazil)

Land status

Ownership category Federal

Ownership information

  • Type Owner-Operator
    Owner Corporacion Minera De Bolivia (Since
    Last year 1952

Production statistics

  • Year 1972
    Period 1971-1972
    Material CANGAS
    Accuracy Estimate
    Description Cp_Grade: ^At Least 60% Fe
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Iron Iron 60wt-pct

Comments on the production information

  • ABOUT 30,000 TO 40,000 MT FE CONS STOCKPILED 1973 AND EXPORTED TO ARGENTINA IN SMALL LOTS 1973-1984.

Comments on the reserve resource information

  • CANGA GRADES 60 TO 64% FE. THESE EARLY ESTIMATES MAY NOW BE REGARDED AS CONSERVATIVE.
  • CANGAS GRADE 60 TO 64% FE.

Comments on the workings information

  • APPARENTLY CONSIST OF A SMALL OPEN PIT IN CANGAS ORE FROM WHICH ABOUT 60,000 MT WAS EXTRACTED 1971-1972.

Comments on development

  • EXPL.COM: FIRST EXAMINED (BY USGS) IN 1945. GEOLOGICAL RECONNAISSANCE 1955 BY H.A. BRASSERT & CO. FOR BANCO MINERO DE BOLIVIA. COMPREHENSIVE DRILLING PROGRAM 1972-1973 CULMINATED IN A FEASABILITY STUDY IN 1977 BY EMPRESA SIDURGICA BOLIVIANA (A COMIBOL SUBSIDIARY) ; MILL.CAP: 400 MT/DAY ; ECON.COM: ABOUT 1500 KM TO NAVIGABLE WATER; PARAGUAY R. VERY SHALLOW DURING DRY SEASON; 1500 KM BY RAIL TO SAO PAULO; PILOT MILL INSTALLED AT LA CHACALERA 1970; FIRST PRODUCTION 4/1971.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit DEPOSIT CONSISTS OF HEMATITE JASPILITE, MAGHEMITE AND GOETHITE SILTSTONE INTERBEDDED WITH FOUR 1 TO 5 M THICK MANGANESE BEDS. SEVERAL CANGAS AND LATERITE LAYERS HAVE DEVELOPED ON EXPOSED ORE. DEPOSIT DIMENSION REFER TO ENTIRE MINERALIZED AREA WITHIN BOLIVIA.
Deposit ALL DATA IN THIS RECORD APPLY TO BOLIVIAN PORTION OF DEPOSIT. THIS RECORD COMBINES INFORMATION FROM W026245, W026244, W026246, W026237, W026243, AND W026238.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1973 Irving, Earl M. U.S. Geological Survey
Updater 01-JUL-1992 Cooper, Margaret (Shaffer, Glenn L.) U.S. Geological Survey

Beyond USGS

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

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