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Pinchi Lake Mine

Past Producer in British Columbia, Canada with commodity Mercury
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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. Ore body information
  8. Economic information about the deposit and operations
  9. Mining district
  10. Mineral rights holdings
  11. Land status
  12. Ownership information
  13. Production statistics
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10206615
MAS/MILS ID 1220100011
Record type Site
Current site name Pinchi Lake Mine
Alternate or previous names Pinchi Lake

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -124.4515, 54.63313 (WGS84)
Elevation 750
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 British Columbia

Commodities

Commodity Importance
Mercury Primary

Nearby scientific data

Ore Body (1) -124.4515, 54.63313
ListMap

Economic information

Ore body information

  • Strike N00E
    Dip 65N
    Length 243M
    Width 36M
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 LENTICULAR
    Type of Orebody #2 SHEAR ZONE
    Shape of Orebody #2 IRREGULAR
    Type of Orebody #3 DISSEMINATED
    Primary mode of Origin UNKNOWN
    Primary Ore Control FRACTURING
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N00E:65N
    Date of Last Modification 840803

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1937
Year of first production 1940
Milling method Flotation

Mining district

District name Pinchi Lake

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights State Lease
Type of mineral rights Private Lease

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Cominco Ltd.
    Interest 100
    Home office Canada
    Year 1975

Production statistics

  • Year 1969
    Description Mt Mercury Ore 337000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Mercury Mercury 337000mt
  • Year 1970
    Description Mt Mercury Ore 354000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Mercury Mercury 354000mt
  • Year 1971
    Description Mt Mercury Ore 225000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Mercury Mercury 225000mt
  • Year 1972
    Description Mt Mercury Ore 184000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Mercury Mercury 184000mt
  • Year 1973
    Description Mt Mercury Ore 148000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Mercury Mercury 148000mt
  • Year 1974
    Description Mt Mercury Ore 157000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Mercury Mercury 157000mt
  • Year 1975
    Description Mt Mercury Ore 113000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Mercury Mercury 113000mt

Comments on the production information

  • PRECISE MILL RECOVERY IS 95.3%.

Reserves and resources

  • Type In-situ
    Estimate year 1981
    Indicated 1090000mt ore
    Demonstrated 1090000mt ore
    Total resources 1090000mt ore
    Commodity Subtype Grade units Group Importance Year
    Mercury Hg 0.32 wt-pct Mercury Major 1981
  • Type In-situ
    Estimate year 1977
    Indicated 1100000mt ore
    Demonstrated 1100000mt ore
    Total resources 1100000mt ore
    Commodity Subtype Grade units Group Importance Year
    Mercury Hg 0.3099 wt-pct Mercury Major 1977
  • Type In-situ
    Estimate year 1974
    Measured 1179000mt ore
    Demonstrated 1179000mt ore
    Total resources 1179000mt ore
    Commodity Subtype Grade units Group Importance Year
    Mercury Hg 0.31 wt-pct Mercury Major 1974

Comments on the reserve resource information

  • DATE OF RESERVES: 1982.
  • M9C4=M1C1 M1=M2 + M3. MATRICES 1 & 9 REFLECT BOTH UNDERGROUND AND OPEN PIT RESOURCES WEIGHTED AVERAGE IN SITU ORE GRADE, AT THE 50% LEVEL AND BELOW, IS 0.33% HG. MATRIX 2 IS UNDERGROUND RESOURCES. MATRIX 3 IS SURFACE RESOURCES.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Capacity 1154
    Capacity Units MT ORE/DAY
    Unit Production Cost 15.97
    Units of Production $/MT ORE
    Operating Days per Year 130
    Operating Shifts per Day 1
    Year of Information 1984
  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method INCLINED CUT AND FILL 10-65
    Percent Recovery 85
    Hardness of Rock UNKNOWN
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. UNKNOWN
    Mine Support Chars. UNKNOWN
    Length of Inclines (m) 400
    Slope of Inclines 9
    Number of Inclines 1
    Capacity 800
    Capacity Units MT ORE/DAY
    Unit Production Cost 15.97
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1984

Comments on other economic factors

  • FEED GRADE IS BLENDED ORE GRADE.

Reference information

Bibliographic references

  • Deposit

    MINING MAGAZINE, ENVIRONMENTAL CONTROL AND PINCHI LAKE;

  • Deposit

    JULY, 1971, P.23.

  • Production

    COMINCO LTD. STAFF, COMINCO LTD.- PINCHI LAKE MINE; D.E.

  • Production

    PICKETT, ED., IN MILLING PRACTICE IN CANADA, CIM SPECIAL

  • Production

    VOLUME 16, 1978, P.327,328.

  • Workings

    CANADIAN MINING JOURNAL, COMINCO PUTS COMPACT, AGILE GRADER

  • Workings

    UNDERGROUND AT PINCHI LAKE MINE; MAY, 1970, P.57,58.

  • Deposit

    COMINCO LIMITED, ANNUAL REPORT, 1981.

  • Deposit

    "COMINCO LIMITED - PINCHI LAKE MINE", MILLING PRACTICE IN

  • Deposit

    CANADA", THE CANADIAN INSTITUTE OF MINING AND

  • Deposit

    METALLURGY, 1978, PP. 327-328.

  • Deposit

    "COMINCO PUTS COMPACT, AGILE GRADER UNDERGROUND AT PINCHI

  • Deposit

    LAKE MINE", CANADIAN MINING JOURNAL, MAY 1970,

  • Deposit

    PP. 57-58.

  • Deposit

    "ENVIRONMENTAL CONTROL AT PINCHI LAKE", MINING MAGAZINE,

  • Deposit

    JULY 1971, P. 23.

  • Deposit

    "PINCHI LAKE: CANADA'S ONLY MERCURY MINE", ENGINEERING AND

  • Deposit

    MINING JOURNAL, SEPTEMBER 1973, PP. 134-135.

  • Deposit

    "THE PINCHI LAKE MINE", MINERAL INDUSTRIES IN WESTERN

  • Deposit

    CANADA, TENTH COMMONWEALTH MINING AND METALLURGICAL

  • Deposit

    CONGRESS, CANADIAN INSTITUTE OF MINING AND METALLURGY,

  • Deposit

    1974, PP. 1-13.

General comments

Subject category Comment text
Deposit BASE DATA SUPPLIED BY PINCOCK, ALLEN, & HOLT, UNDER BUMINES CONTRACT, AS OF JANUARY 1982. DATA VERIFIED, AND RESERVES AND COSTS UPDATED TO JAN. 1984, BY MAFO PERSONNEL.

Reporter information

Type Date Name Affiliation Comment
Reporter 23-DEC-1994 Minerals Availability Field Office (Mafo) 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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