Dumont

Producer in Quebec, Canada with commodity Nickel
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. Ownership information
  15. Reserves and resources
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10069227
MRDS ID W002758
Record type Site
Current site name Dumont

Geographic coordinates

Geographic coordinates: -78.433, 48.64999 (WGS84)
Relative position 60 KM NORTHEAST OF ROUYN - NORANDA

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Canada Quebec

Commodities

Commodity Importance
Nickel Critical Primary

Materials information

Materials Type of material
Pentlandite Ore
Magnesite Gangue
Serpentine Gangue
Talc Gangue

Alteration

  • (Local) Greenschist Metamorphism

Analytical data

Result PRIMARY SULFIDES ARE APPROX. 1 MM. IN DIAMETER
Result SECONDARY SULFIDS RANGE UP TO 100 MICRONS IN SIZE

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Ultramafics
    Rock description Ultramafics
    Stratigraphic age (youngest) Eoarchean
    Stratigraphic age (youngest) Neoarchean
    Stratigraphic age (youngest) Neoarchean
    Stratigraphic age (youngest) Neoarchean
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock
    Rock unit name Andesites
    Rock description Andesites

Nearby scientific data

(1) -78.433, 48.64999

Economic information

Geologic structures

Type of structure Regional
Structure description Trend Of Greenstone Belt
Type of structure Local
Structure description None

Ore body information

  • General form SILL LIKE
    Strike N 60 W
    Dip 70 NE
    Thickness 800M
    Length 7000M
    Width 1000M

Controls for ore emplacement

  • Serpentinization Process Concentrates Nickel.

Comments on the geologic information

  • ANDESITES ARE HOST ROCKS TO ULTRAMAFIC INTRUSION.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1970

Ownership information

  • Type Owner
    Owner Dumont Nickel Corp.

Reserves and resources

  • Type In-situ
    Estimate year 1973
    Total resources 500000000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 0.33 wt-pct Nickel Major 1973

Comments on development

  • ECON.COM: DEPOSIT IS LARGE BUT OF LOW GRADE.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit THE WELLGREEN PROPERTY IS HELD BY HUDSON-YUKON MINING CO., LTD. (95.5% OWNED BY HUDSON BAY MINING AND SMELTING CO., LTD. A 215,000 M.T.P.Y. CONCENTRATOR WAS COMPLETED AND PRODUCTION COMMENCED IN 1972. DUE TO UNDERGROUND MINING DIFFICULTIES THE WELLGREENE MINE WAS CLOSED EARLY 1973
Deposit NEAR AMOS, QUEBEC, CANADA, NORTH OF VAL D'OR, CANADA. FEASIBILITY STUDY HAS BEEN COMPLETED (1973) AND AN INITIAL 1.5 MILLION M.T.P.Y. OF ORE IS PROJECTED, SUBJECT TO COMPLETION OF FINANCING-DUMONT NICKEL CORPORATION .. DUMONT NICKEL COMPANY. INVESTMENT SO FAR $14 MILL.. AN ULTRAMAFIC SILL OF ARCHEAN AGE WAS INTRUDED INTO ARCHEAN ANDESITES OF THE ABITIBI GREENSTONE BELT. DURING INTRUSION, HOW DIFFERENTIATION CONCENTRATED OLIVINE TOWARDS THE SILL'S CENTER AND SOME IMMISCIBLE SULFIDE BLEBS SEPARATED FROM THE MAGMA. THE ULTRAMAFIC SHEET WAS SERPENTINIZED. DURING THIS ALTERATION, NI IN THE OLIVINE WAS REMOBILIZED AND COMBINED WITH SULFUR TO FORM SECONDARY, FINE GRAINED SULFIDE BLEBS. THIS SECONDARY ENRICHMENT IN NICKEL SULFIDES CAN OCCUR ONLY IN LOW GRADE DEPOSITS IN WHICH THE SILICATE MINERAL ASSEMBLAGES CAN BUFFER THE CHEMICAL REACTIONS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1974 Shaffer, Glenn L. U.S. Geological Survey
Updater 01-APR-1976 Foose, Michael P. U.S. Geological Survey

Beyond USGS

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