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Maskwa

Prospect in Manitoba, Canada with commodities Nickel, Copper, PGE
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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. 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. Reserves and resources
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10039341
MRDS ID M046987
Record type Site
Current site name Maskwa
Alternate or previous names Maskwa West, Maskwa Open Pit

Geographic coordinates

Geographic coordinates: -95.45033, 50.46667 (WGS84)
Relative position MASKWA LAKE - BIRD RIVER AREA, 160 KM NE OF WINNIPEG

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Canada Manitoba

Comments on the location information

  • REPORT COVERS THE ENTIRE COUNTY, THEREFORE A GENERAL LOCATION IS GIVEN. AT LEAST PART OF AREA MAY LIE WITHIN CHATTAHOOCHEE NATIONAL FOREST

Commodities

Commodity Importance
Nickel Critical Secondary
Copper Secondary
PGE Critical Tertiary

Comments on the commodity information

  • MAJOR CONCENTRATIONS OF GOLD ARE IN AREAS WHERE NO MINING IS RECORDED. BEST GOLD PLACERS ARE ALONG SOQUE RIVER AND TRIBUTARIES AND IN SHOAL CREEK, EAST OF GRASSY MOUNTAIN, AND BEAVERDAM CREEK, 5 MI WEST OF CLARKESVILLE. SMALL GRAINS OF PT WERE IDENTIFIED AT 9 LOCALITIES, BUT AUTHOR SUGGESTED THERE MAY HAVE BEEN CONTAMINATION FROM MATERIAL LODGED IN SCREENS.
  • 1976

Materials information

Materials Type of material
Chalcopyrite Ore
Pentlandite Ore
Pyrrhotite Ore
Chlorite Gangue
Magnetite Gangue
Millerite Gangue
Pyrite Gangue
Talc Gangue

Alteration

  • (Local) Extensive Near-Surface Supergene Alteration

Analytical data

Result NI=1.17% CU=0.23% S=4.62%

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
    Rock unit name Bird River Greenstone Belt;Maskwa Lake Quartz Diorite;Lac Dv Bonet Quartz Monzonite Pluton
    Rock description Bird River Greenstone Belt;Maskwa Lake Quartz Diorite;Lac Dv Bonet Quartz Monzonite Pluton
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite

Nearby scientific data

(1) -95.45033, 50.46667
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Maskwa Mine Located In Basal Unit Of Bird River Sill And Volcanic Rocks. Belt Folded In Major Anticline With Axis Plunging E To Se. Prominent Nw-Se Faulting In Belt
Type of structure Local
Structure description Bird River Sill Layered And Differentiated Ultramafic To Anorthositic Gabbro. Compositional Layering Indicates Topfacing South. Intense Nw And W Nw Faulting Present. Sill Is Synvolcanic And Has Avg. Thickness 1000m

Ore body information

  • General form IRREGULAR
    Strike E NE
    Dip 60 DEG, 90 DEG
    Thickness 20M
    Length 1280M
    Depth to top 0M
    Depth to bottom 42M

Controls for ore emplacement

  • Close Proximity Of Bird River Sill To Feeder Source And Magmatic Settling Towards Base Of Sill(Ref. No. 3,P316)

Comments on the geologic information

  • BEDROCK IS HIGH-GRADE METAMORPHIC AND IGNEOUS ROCKS. COUNTY CONTAINS NUMEROUS LOW-GRADE AU-BEARING VEINS.
  • HYPOTHESIS FOR ORIGIN OF SMALL ULTRAMAFIC BODIES NEAR MASKWA: THEY ARE BLOCK FAULTED SLICES FROM SILL (JUHAS 1973) AND ARE EXPOSED REMNANTS OF FEEDER PIPIE THROUGH WHICH INTRUSION OF SILL OCCURRED. LOCAL GABBROIC INTRUSIONS AND OTHER EVIDENCE SUGGEST PROXIMITY VOLCANIC VENT IN AREA (TRUEMAN AND TURNOCK 1975). METAMORPHIC INDICATORS IN GREENSTONE BELT SHOW THREE EPISODES REGIONAL FOLKING AND PLACES MET. GRADE IN LOWER AMPHIBOLITE FACIES(JUHAS 1973), TRUEMAN AND TURNICK 1975, TRUEMAN, POSEHN AND STOETERAU 1975)

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Significant No
Discovery year 1974
Discoverer Dumbarton Mines Ltd.
Year of first production 1974
Year of last production 1976

Mining district

District name Manitoba

Ownership information

  • Type Owner-Operator
    Owner Dumbarton Mines Ltd.; Maskwa
    First year 1986

Production statistics

  • Year 1976
    Period 1974-1976
    Material ORE
    Description Cp_Grade: ^Avg. Grade = 1.16% Ni, 0.20% Cu, Low Grade Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Copper Copper 0wt-pct
    Trace Ore Nickel Nickel 1wt-pct

Comments on the production information

  • INCREASE IN SULFIDE CONTENT AND NI GRADE IN DESSEMINATED SULFIDES TOWARDS STRATIGRAPHIC BASE OF SILL. PROD. FROM OPEN PIT CONSISTED OF OXIDIZED ORE.

Reserves and resources

  • Type In-situ
    Estimate year 1986
    Total resources 408000mt ore
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 1.34 wt-pct Nickel Minor 1986
    Copper Cu 0.23 wt-pct Copper Minor 1986

Comments on the reserve resource information

  • 1986 DATA INCLUDE PRODUCTION + RESERVES.

Workings at the site

  • Type of workings Surface
    Area 2.4HA
    Overall length 274.32M
    Overall width 80M

Comments on the workings information

  • WIDTH AND AREA EST. FROM MINE PLAN, P312 REF. NO. 3

Comments on development

  • DISCOVERY OF MASKWA ORE ZONE BY DIAMOND DRILLING 1.2KM SW OF DUMBARTON MINE PROLONGED BASE METAL PROD. IN AREA TILL 6/76

Reference information

Bibliographic references

  • Deposit

    ANNIS, CRANSTONE, AND VALLEE, 1978 , KNOWN MIN. CA.: DEPT. ENERGY, MINES RESOURCES CA., BULL. MR 181

  • Deposit

    CANADIAN MINES HANDBOOK, 1973 - 74 : NO. MINER, P. 207

  • Deposit

    COATS, STOCKFORD, AND BUCHAN, 1979, GEOLOGY OF MASKWA WEST NICKEL DEPOSIT, MANITOBA: CANADIAN MINERALOGIST, VOL.17, PP. 309 - 318

  • Deposit

    FOGWILL, DOUGLAS, AND BAMBURAK, JAMES, 1987, MINING IN MANITOBA: MANITOBA ENERGY AND MINES, MINERAL EDUCATION SERIES, 46 P.

  • Reserve-Resource

    ANNIS ETAL., 1978 , KNOWN MIN. CA. NOT MINED; FOGWILL AND BAMBURAK, 1987, P. 25.

General comments

Subject category Comment text
Deposit REFERENCE CITED COVERS MANY POTENTIAL RESOURCES WITHIN THE COUNTY; THIS RECORD IS CONCERNED PRIMARILY WITH PT ; INFO.SRC : 1 PUB LIT
Deposit STRIKE LENGTH INTERPRETED AS MAX WIDTH. FIRST DIP OF SURFACE, SECOND DIP 120M BELOW SURFACE. STRIKE IS APPROX

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1979 Saso, Jerri L. U.S. Geological Survey
Updater 01-DEC-1972 Oster, Karel L. U.S. Geological Survey
Updater 01-JUN-1989 Bolm, Karen S. U.S. Geological Survey

Beyond USGS

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

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