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Holt-Mcdermott

Plant in Ontario, Canada with commodity Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Nearby scientific data
  7. Economic information about the deposit and operations
  8. Mineral rights holdings
  9. Ownership information
  10. Production statistics
  11. Reserves and resources
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10157994
MAS/MILS ID 1220400075
Record type Site
Current site name Holt-Mcdermott
Alternate or previous names Mattawasaga, Worvest, McKenna, Ghostmount

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -79.73862, 48.51359 (WGS84)
Location accuracy 100(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

Nearby scientific data

Ore Body (1) -79.73862, 48.51359
ListMap

Economic information

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1981
Mining method Open Stope - Other Open Stope Methods
Year of first production 1988
Plant type Leach
Plant subcategory Hydromet
Milling method Hydrometallurgy Unspecified

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights Patented

Ownership information

  • Type Owner-Operator
    Owner Barrick Resources Corp.
    Interest 100
    Home office Canada
    Year 1997
    First year 1995
  • Type Owner-Operator
    Owner American Barrick Resources Corp.
    Interest 100
    Home office Canada
    Year 1997
    Last year 1995

Production statistics

  • Year 1988
    Description 5.13 G Au 155000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 155000mt 5g/mt
  • Year 1989
    Description 4.1 G Au 508316 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 508316mt 4g/mt
  • Year 1990
    Description 4.24 G Au 467556 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 467556mt 4g/mt
  • Year 1992
    Description Ore Milled @ 3.77 G/Mt Au 411227 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 411227mt 4g/mt
  • Year 1993
    Description Ore Milled @ 5.42 G/Mt Au 388003 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 388003mt 5g/mt
  • Year 1994
    Description Ore Milled @ 5.31 G/Mt Au 367591 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 367591mt 5g/mt
  • Year 1995
    Description Ore Milled @ 5.59 G/Mt Au 382469 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 382469mt 6g/mt
  • Year 1996
    Description Ore Milled @ 8.61 G/Mt Au 438805 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 438805mt 9g/mt

Reserves and resources

  • Type In-situ
    Estimate year 1991
    Total resources 4657488mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 5.07 g/mt Gold Major 1991
  • Type In-situ
    Estimate year 1992
    Demonstrated 2542840mt ore
    Total resources 2542840mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 5.49 g/mt Gold Major 1992
  • Type In-situ
    Estimate year 1992
    Total resources 1208000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 5.49 g/mt Gold Major 1992
  • Type In-situ
    Estimate year 1997
    Demonstrated 2805015mt ore
    Total resources 2805015mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 8.06 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1997
    Demonstrated 3297617mt ore
    Total resources 3297617mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 6.89 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1997
    Demonstrated 5354204mt ore
    Total resources 5354204mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 5.11 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1997
    Demonstrated 8651821mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 5.79 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1992
    Demonstrated 2543000mt ore
    Total resources 2543000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 5.087 g/mt Gold Major 1992

Comments on the reserve resource information

  • RESERVE DATE 12/31/96; PROVEN + PROBABLE + MINERALIZED MAT; SEE "A" BIB. SOURCE FOR DETAILS; COG IS 5.3 G/MT AU; PRODUCTION BASED ON AVG DATA FROM 1992 TO 1996:

Reference information

Bibliographic references

  • Reserve-Resource

    CANADIAN MINES HANDBOOK, 1991-92, PAGE 39.

  • Reserve-Resource

    CANADIAN MINES HANDBOOK, 1992-93, PAGE 35.

  • Reserve-Resource

    THE NORTHERN MINER, "IF WE HADN'T FOUND THIS ZONE...",

  • Reserve-Resource

    "HOLT-MCDERMOTT GETS MORE ORE", JUNE 10, 1991, PAGES 1, 2.

  • Reserve-Resource

    CANADIAN MINES HANDBOOK, 1996-97, P61.

  • Reserve-Resource

    BARRICK GOLD CORPORATION, 1996 FROM 40-F, PP. 14, 44-45.

  • Deposit

    THE MINING JOURNAL, V328, #8417, FEB., 21, 1997, P10.

  • Deposit

    CANADIAN MINES HANDBOOK, 1996-97, PP. 61, 473.

General comments

Subject category Comment text
Deposit PRODUCTION STARTED 6/88 OPERATION CHANGED OVER FORM OPEN PIT TO UNDERGROUND OPEN STAPE METHODS WHEN TWO SMALL OPEN PITS WERE EXHAUSTED BY YEAR-END 1992.

Reporter information

Type Date Name Affiliation Comment
Reporter 23-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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