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Morro Do Ouro

Producer in Minas Gerais, Brazil 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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Ownership information
  13. Reserves and resources
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10056392
MRDS ID TC00058
Record type Site
Current site name Morro Do Ouro

Geographic coordinates

Geographic coordinates: -46.87042, -17.21454 (WGS84)
Elevation 741
Relative position 1.5 KM NORTH OF PARACATU

Site location context

Political divisions (FIPS codes)

Minas Gerais(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Minas Gerais

Comments on the location information

  • IN NORTHWEST OF MINAS GERAIS STATE

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Comments on the commodity information

  • TYPICAL GRAIN SIZES ARE BETWEEN 1 AND 800 MICRON.

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Limonite Gangue
Quartz Gangue

Alteration

  • (Local) Phyllites Are Heavily Weathered And Oxidized

Analytical data

Result GOLD CONTAINS 0.38-0.59 PPM AG, 0.05 PPM PT, 0.01 PPM PD, 0.004-0.020 PPM CU.

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Phyllite
    Rock unit name Vazante Formation
    Rock description Vazante Formation
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Associated
    Rock type Sedimentary Rock > Carbonate > Limestone
  • Host or associated Associated
    Rock type Sedimentary Rock > Carbonate > Dolomite
  • Host or associated Host
    Rock type Metamorphic Rock > Phyllite
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Paracatu Formation;Paracatu Formation;Paracatu Formation
    Rock description Paracatu Formation;Paracatu Formation;Paracatu Formation

Nearby scientific data

(1) -46.87042, -17.21454
ListMap

Economic information

Ore body information

  • General form STREAKS AND LENSES

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1734
Discoverer Prospectors
Year of first production 1987
Production years PRODUCTION DATES FROM THE EARLY 18TH CENTURY

Ownership information

  • Type Owner
    Owner Rtz Group
    Interest 51
  • Type Owner
    Owner Autram Aureum Industria And Comercio S/A
    Interest 49
  • Type Operator
    Owner Enjex Mineracao Ltd (New Jersey Zinc)
    First year 1977
    Last year 1978
  • Type Operator
    Owner Mineracao Rio Xingu Ltd (Billiton Metais S. A.)
    First year 1980
  • Type Operator
    Owner Riofinex Do Brasil Geologia E Pequisas Ltd.
    First year 1980
  • Type Operator
    Owner Rtz Mineracao Ltd.
    First year 1980

Reserves and resources

  • Type In-situ
    Estimate year 1988
    Commodity Subtype Grade units Group Importance Year
    Gold Au 0.61 g/mt Gold Major 1988

Comments on the reserve resource information

  • THE PROJECT HAS SCHEDULED RESERVE UNTIL 2003 BASED ON AN ORE PRODUCTION RATE OF 5.6 M T/Y RESULTING IN PRODUCTION OF BETWEEN 3 AND 3.5 T/Y OF AU. ORE (1) MEASURE RESERVES WITH 0.5 G/MT AU CUTOFF GRADE; ORE (2) MEASURED RESERVES BELOW 0.5 G/MT AU CUTOFF GRADE; ORE (3) ORE IN "URIDADE B MOLE" OF 1862599 SQUARE M WITH DENSITY OF 2.15 AND DEPTH 12.73 M.

Comments on development

  • IN 1888 AND AFTER, MOST OF DRAINAGES THAT RADIATE FROM MORRO DO OURO WERE PLACERED. EXPL.COM: 1980-1985 4000+ M OF VERTICLE PITS 0.8 M IN DIA. AND UP TO 32 M IN DEPTH WERE EXCAVATED ON A 100 X 100 M GRID. 4 CHANNEL SAMPLES WERE TAKEN FROM EACH PIT ON A 1 M BASIS AND AU CONTENT WAS DETERMINED BY FIRE ASSAY. PITS WERE LOGGED FOR STRUCTURE, QUARTZ BOUDIN, LIMONITE AND GRAPHITIC CONTENT. ; TOTAL$: 67 ; MILL.CAP: 750 DRY T/H ; ECON.YEAR: 1985

Reference information

Bibliographic references

  • Deposit

    MINING MAGAZINE, 1988, MORRO DO OURO--RTZ'S NEW LOW-GRADE GOLD MINE IN BRAZIL: V. 159, NO. 4, P. 256-263.

  • Deposit

    SKILLINGS, D.N., JR., 1988, CVRD EXPANDING ANNUAL PRODUCTION OF FAZENDA BRASILEIRO GOLD MINE IN BAHIA TO 6 METRIC TONS: SKILLINGS' MINING REVIEW, AUGUST 20, 1988, P. 4-7.

  • Deposit

    ZINI, A., FORLIM, R., ANDREAZZN, P., AND DE SOUZA, A., 1988, DEPOSITO DE OURO DO MORRO DO OURO, PARACATU, MINAS GERAIS, IN PRINCIPAIS DEPOSITOS MINERAIS DO BRASIL, EDS. C. SCHOBBENHAUS AND C.E.S. COELHO: MINISTERIO DAS MINAS E ENERGIA, BRASILIA, V. III, P. 478-489.

  • Production

    MINING MAGAZINE, 1988, P. 256.

General comments

Subject category Comment text
Deposit GOLD OCCURS CONCENTRATED IN QUARTZ BOUDINS, RESIDUAL AS RESULT OF OXIDATION OF SULFIDES, AND IN MICRO-FRACTURES. ORIGINAL PATTERNS OF GOLD DISTRIBUTION HAVE BEEN SUBSTANTIALLY MODIFIED BY METAMORPHIC/HYDROTHERMAL AND SUPERGENE REMOBILIZING PROCESSES.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1989 Bolm, Karen S. U.S. Geological Survey
Updater 15-JUL-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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