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  3. Mineral Resource Data System (MRDS)

Macassa

Plant in Ontario, Canada 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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Mineral rights holdings
  12. Ownership information
  13. Production statistics
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10303697
MAS/MILS ID 1220400011
Record type Site
Current site name Macassa
Alternate or previous names Kirkland West, Wilroy Mine, Main Break, St Joseph, Gracie

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -80.11644, 48.23329 (WGS84)
Location accuracy 5000(meters)

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Canada Ontario

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Altaite Unknown
Calaverite Unknown
Pyrite Unknown
Quartz Unknown

Nearby scientific data

Main Entrance (1) -80.11644, 48.23329
ListMap

Economic information

Ore body information

  • Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 LENTICULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FOLDING
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. UNKNOWN
    Date of Last Modification 861031

Comments on the geologic information

  • THE ROCKS AROUND THE DEPOSIT WERE UNTRUDED BY AN ALGOMAN SYENITE AND SYENITE PORPHYRY STOCK. IN ADDITION, THERE WAS AN INTRUSION OF A DIABASE DIKE. THE ORE CONSISTS OF SEVERAL GENERATIONS OF QUARTZ, SOME CARBONATE, WALL ROCK INCLUSIONS, MINOR SULFIDES, TELLURIDES, AND NATIVE GOLD. GOLD IS MOSTLY CONFINED WITHIN QUARTZ, ALTHOUGH SOME IS ASSOCIATED WITH PYRITE AND TELLURIDES.

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Significant Yes
Mining method Filled Stopes - Other Filled Stope Methods
Year of first production 1933
Plant type Leach
Plant subcategory Hydromet
Milling method Hydrometallurgy Unspecified

Comments on exploration

  • EXPLORATION CONSISTED OF EXTENSIVE DIAMOND DRILLING AND UNDERGROUND DEVELOPMENT EXPLORATION.

Mining district

District name Kirkland Lake

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights Patented

Ownership information

  • Type Owner-Operator
    Owner Kinross Gold Corp.
    Interest 100
    Home office Canada
    Year 1997
    First year 1995
  • Type Owner-Operator
    Owner Barrick Gold Corp. (American Barrick Resources Corp.)
    Interest 100
    Home office Canada
    Year 1997
    First year 1995
    Last year 1995
  • Type Owner-Operator
    Owner American Barrick Resources Corp.
    Interest 100
    Home office Canada
    Year 1994
    First year 1994
    Last year 1995
  • Type Owner-Operator
    Owner Lac Minerals Ltd.
    Interest 100
    Home office Canada
    Year 1991
    Last year 1994

Production statistics

  • Year 1967
    Description Ore Milled 98280 Metric Tons Per Year
  • Year 1970
    Description Ore Milled 69849 Metric Tons Per Year
  • Year 1975
    Description Ore Milled 79839 Metric Tons Per Year
  • Year 1980
    Description Ore Milled 100679 Metric Tons Per Year
  • Year 1985
    Description 15.56 G Au 108182 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 108182mt 16g/mt
  • Year 1986
    Description Ore Production 121818 Mt Ore
  • Year 1987
    Description 15.66 G Au 134545 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 134545mt 16g/mt
  • Year 1988
    Description 16.42 G Au 145455 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 145455mt 16g/mt
  • Year 1989
    Description 17.07 G Au 150442 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 150442mt 17g/mt
  • Year 1990
    Description 18.64 G Au 179091 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 179091mt 19g/mt
  • Year 1996
    Description Ore Milled @ 6.18 G Au 449106 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 449106mt 6g/mt

Comments on the production information

  • DESCRIPTION SHOWS MILL FEED GRADES.
  • THE GOLD AND SILVER CONCENTRATES ARE ACTUALLY PRODUCED AS ONE PRODUCT; A DORE BULLION BAR, WHICH IS SEPARATED, AT THE REFINERY, INTO THE RESPECTIVE PRODUCTS.

Reserves and resources

  • Type In-situ
    Estimate year 1981
    Measured 617939mt ore
    Demonstrated 617939mt ore
    Total resources 617939mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 12.27 g/mt Gold Major 1981
  • Type In-situ
    Estimate year 1991
    Demonstrated 1517mt ore
    Inferred 213mt ore
    Total resources 1730mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 18.002 g/mt Gold Major 1991
  • Type In-situ
    Estimate year 1992
    Indicated 1142146mt ore
    Demonstrated 1142146mt ore
    Total resources 1142146mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 19.2 g/mt Gold Major 1992
  • Type In-situ
    Estimate year 1997
    Measured 998000mt ore
    Indicated 141000mt ore
    Demonstrated 1139000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 14.13 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1997
    Measured 224000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 15.43 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1997
    Demonstrated 1363000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 14.35 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1997
    Demonstrated 1726000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 12.42 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1997
    Demonstrated 1726000mt ore
    Inferred 165000mt ore
    Total resources 1891000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 12.65 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1992
    Indicated 1142146mt ore
    Demonstrated 1142146mt ore
    Total resources 1142146mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 19.2 g/mt Gold Major 1992

Comments on the reserve resource information

  • RESOURCES DATA USED IN THE 1982 WORLD GOLD STUDY. RESOURCES DATA USED IN THE 1993 CANADIAN GOLD STUDY. SEE "R" RESOURCES RECORD 3 AND 9 FOR PUBLIC DATA. AND BIBLI. RECORD "R" 004-005 FOR SOURCE.
  • TOTAL ORE (DEMON) INCLUDES SHAFT #3 PILLAR ORE; 12/31/96: SEE "R" RECPRD 7: PRODUCTION SEE 1996 KINROSS ANNUAL REPORT, P16.

Workings at the site

  • Type of workings Underground
    Overall depth 2105M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method SHRINKAGE W/TIMBERED METHODS
    Percent Recovery 100
    Hardness of Rock UNKNOWN
    Rock Characteristics UNKNOWN
    Rock Support Chars. SUPPORTING
    Mine Support Chars. TIMBER
    Number of Shafts 3
    1st Condition of Workings OPEN
    Capacity 402
    Capacity Units MT ORE/DAY
    Unit Production Cost 67.21
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 3
    Year of Information 1982

Comments on other economic factors

  • THE DORE BULLION IS TRUCKED, VIA BRINKS SECURITY, TO THE ROYAL CANADIAN MINT, FOR REFINING.

Reference information

Bibliographic references

  • Production

    1996 PRODUCTION: KINROSS 1996 ANNUAL REPORT, P16.

  • Reserve-Resource

    THE NORTHERN MINER, "LAC A WINNER ON FAVORABLE FORWARD GOLD

  • Reserve-Resource

    SALES", MAY 7, 1981, P. 3.

  • Reserve-Resource

    CANADIAN MINES HANDBOOK, 1991-92, PAGE 231.

  • Reserve-Resource

    LAC 1992 ANNUAL REPORT, PAGE 17.

  • Reserve-Resource

    CANAIDAN MINES HANDBOOK, 1992-93, PAGE 216.

  • Reserve-Resource

    CANADIAN MINES HANDBOOK, 1996-97, P 250.

  • Reserve-Resource

    KINROSS 1995 FORM 40-F, P 23.

  • Reserve-Resource

    KINROSS 1996 ANNUAL REPORT, P1.

  • Deposit

    ACRES DAVY MCKEE. GOLD MINING IN CANADA, 1981.

  • Deposit

    ANNUAL REPORTS - WILROY MINES LTD. (1970-1980).

  • Deposit

    ANNUAL REPORTS - LITTLE CONO LAC GROUP, 1980.

  • Deposit

    BOYLE, R.W. THE GEOCHEMISTRY OF GOLD AND ITS DEPOSITS.

  • Deposit

    GEOLOGICAL SURVEY OF CANADA, BULLETIN 280,1979, PP. 291-292.

  • Deposit

    CANADIAN MINES HANDBOOK, NORTHERN MINER PRESS, 1981-82,

  • Deposit

    PP. 351-352.

  • Deposit

    FINANCIAL POST CORPORATION SERVICE. REPORT ON WILROY

  • Deposit

    MINES LTD. MCCLEAN HUNTER, LTD., 1981.

  • Deposit

    NABB, F.A. AND FOX, W.M. WILROY MINES LTD. (MACASSA

  • Deposit

    DIVISION) IN MINING PRACTICE IN CANADA. CIM SPECIAL VOLUME

  • Deposit

    16, 1978, PP. 78-79.

  • Deposit

    THOMPSON, J.E., ET. AL. 1950 GEOLOGY OF THE MAIN ORE

  • Deposit

    ZONE AT KIRKLAND LAKE. ONTARIO DEPT. OF MINES, 57TH ANNUAL

  • Deposit

    REPORT, VOLUME 57, PART 5, 1948, PP. 54-188.

  • Deposit

    WARD, W.G. MACASSA GOLD MINES LTD. (MACASSA DIVISION).

  • Deposit

    CIM GOLD SYMPOSIUM AND FIELD EXCURSION, 1967, PP. 85-86.

  • Deposit

    CANADIAN MINES HANDBOOK, 1989-90, P. 261-263.

  • Deposit

    CANADIAN MINES HANDBOOK, 1990-91, P. 256.

  • Deposit

    THE MINING JOURNAL, V328, #8417, 02/21/97, P10.

Reporter information

Type Date Name Affiliation Comment
Reporter 22-JUL-97 Buckingham, David A. 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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