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Lupin

Plant in Northwest Territories, 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. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10182102
MAS/MILS ID 1220300011
Record type Site
Current site name Lupin
Alternate or previous names Contwyo Lake

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -111.22783, 65.76464 (WGS84)
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Canada Northwest Territories

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Arsenopyrite Unknown
Chalcopyrite Unknown
Garnet Unknown
Pyrite Unknown

Nearby scientific data

Ore Body (1) -111.22783, 65.76464
ListMap

Economic information

Ore body information

  • Strike N45E
    Dip 80W
    Length 200M
    Width 3.1M
    Area 2000HA
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FOLDING
    Degree of Wallrock Alter. UNKNOWN
    Strike And Dip N45E:80W
    Minimum Depth to Top 0
    Total Surface Area (HA) 2000
    Date of Last Modification 930604

Comments on the geologic information

  • THE DEPOSIT IS AN AMPHIBOLITE VIEN CONTAINING VARIABLE AMOUNTS OF GOLD BEARING SULFIDES. THE VEIN HAS BEEN ISOCLINALLY FOLDED, RESULTING IN THREE STEEPLY-DIPPING "LINKS", REFERRED TO AS THE EAST, CENTER, AND WEST ZONES.
  • GOLD IS DISTRIBUTED FAIRLY UNIFORMLY THROUGHOUT THE DEPOSIT, BEING MAINLY FOUND IN GARNET-GRUNERITE GNEISS.

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1960
Mining method Open Stope - Sublevel
Year of first production 1982
Plant type Beneficiation (Mill)
Plant subcategory Hydromet
Milling method Merrill-Crowe

Mining district

District name Contwoytd Lake

Mineral rights holdings

Type of mineral rights Patented

Ownership information

  • Type Owner-Operator
    Owner Echo Bay Mines Ltd.
    Interest 100
    Home office Canada
    Year 1991

Production statistics

  • Year 1985
    Description 11.12 G Au 571558 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 571558mt 11g/mt
  • Year 1987
    Description 10.26 G Au 614671 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 614671mt 10g/mt
  • Year 1988
    Description 10.57 G Au 627594 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 627594mt 11g/mt
  • Year 1989
    Description 10.29 G Au 626528 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 626528mt 10g/mt
  • Year 1990
    Description 10.26 G Au 630000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 630000mt 10g/mt
  • Year 1992
    Description Ore Milled @ 10.56 G Au 674946 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 674946mt 11g/mt
  • Year 1993
    Description Ore Milled @ 9.33 G Au 772922 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 772922mt 9g/mt
  • Year 1994
    Description Ore Milled @ 8.16 G Au 740263 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 740263mt 8g/mt
  • Year 1995
    Description Ore Milled @ 8.85 G Au 655895 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 655895mt 9g/mt
  • Year 1996
    Description Ore Milled @ 8.06 G Au 687646 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 687646mt 8g/mt

Comments on the production information

  • DESCRIPTION SHOWS MILL FEED GRADES.
  • PRODUCTS A AND B ARE ACTUALLY PRODUCED AS ONE PHYSICAL PRODUCT A DORE BULLION CONCENTRATE WHICH WILL BE SEPARATED BY REFINING AT THE ROYAL CANADIAN MINT, IN OTTAWA.

Reserves and resources

  • Type In-situ
    Estimate year 1980
    Indicated 2439000mt ore
    Demonstrated 2439000mt ore
    Total resources 2439000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 13 g/mt Gold Major 1980
  • Type In-situ
    Estimate year 1991
    Indicated 3844650mt ore
    Demonstrated 3844650mt ore
    Total resources 3844650mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 10.15 g/mt Gold Major 1991
  • Type In-situ
    Estimate year 1991
    Demonstrated 3844650mt ore
    Inferred 2319672mt ore
    Total resources 6164322mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 9.65 g/mt Gold Major 1991
  • Type In-situ
    Estimate year 1995
    Demonstrated 2218067mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 9.6 g/mt Gold Major 1995
  • Type In-situ
    Estimate year 1997
    Demonstrated 1429723mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 9.63 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1991
    Indicated 3844650mt ore
    Demonstrated 3844650mt ore
    Total resources 3844650mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 10.15 g/mt Gold Major 1991

Comments on the reserve resource information

  • RESOURCE RECORD 3 AND 9 FROM DATA IN ECHO BAY MINES LTD., 1991 AR AND 10K. SEE BIBLIOGRAPHY REFERENCES.
  • Q-MATRIX 1 COL. 1 DATA USED IN THE 1982 PROPERTY EVALUATION. Q-MATRIX 1 COL. 3 DATA FOR USE IN THE 1993 PROPERTY EVALUATION SEE BIBLIOGRAPHY REFERENCES.
  • PROVEN + PROBABLE ORE RESERVES, 12/31/96.

Workings at the site

  • Type of workings Underground
    Overall depth 325M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OPEN STOPE
    Percent Recovery 90
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics UNKNOWN
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 2
    1st Condition of Workings OPEN
    Capacity 1282
    Capacity Units MT ORE/DAY
    Unit Production Cost 40.14
    Units of Production $/MT ORE
    Operating Days per Year 312
    Operating Shifts per Day 2
    Year of Information 1982

Reference information

Bibliographic references

  • Reserve-Resource

    TRIGG, WOOLLETT CONSULTING, LTD. REPORT ON LUPIN GOLD

  • Reserve-Resource

    1991 10K REPORT, ECHO BAY MINES LTD., PAGE 9.

  • Reserve-Resource

    1991 ANNUAL REPORT, ECHO BAY MINES LTD., PAGE 51.

  • Reserve-Resource

    ECHO BAY MINES LTD, 1996 FORM 10-K REPORT, P14.

  • Deposit

    ANNUAL REPORT- ECHO BAY MINES LTD.- 1980.

  • Deposit

    BEAL CONSULTANTS LTD. INITIAL ENVIRONMENTAL EVALUATION

  • Deposit

    FOR THE LUPIN GOLD PROJECT, CONTWOYTD LAKEM N.W.T. 1980.

  • Deposit

    CANADIAN MINES HANDBOOK, 1966-1981. NORTHERN MINER PRESS.

  • Deposit

    DOME MINES LTD. ECONOMIC ANALYSIS AND FEASIBILITY REPORT,

  • Deposit

    LUPIN PROPERTY, CONTWOYTD LAKE, N.W.T., TORONTO. 1964.

  • Deposit

    NORTHERN MINER. INTERNAL FILE ON ECHO BAY MINES,LTD. 1981

  • Deposit

    STOCKWELL, C.H. INTRODUCTION- IN GEOLOGY OF THE CANADIAN

  • Deposit

    SHIELD. 1970, PP. 4-150 IN R.J.W. DOUGLAS (ED.), GEOLOGY

  • Deposit

    AND ECONOMIC MINERALS OF CANADA, GEOLOGICAL SURVEY OF CANADA,

  • Deposit

    ECONOMIC GEOLOGY, REPORT 1.

  • Deposit

    TREMBLAY, L.P. GEOLOGY OF NORTHERN CONTWOYTD LAKE AREA,

  • Deposit

    DISTRICT OF MACKENZIE. GEOLOGICAL SURVEY OF CANADA, MEM. 381,

  • Deposit

    1976, 56 PP.

  • Deposit

    WATTS, GRIFFIS AND MCQUAT, LTD. REPORT ON LUPIN GOLD

  • Deposit

    DEPOSIT. 1980.

  • Deposit

    CANADIAN MINES HANDBOOK, 1996-97, P148.

  • Deposit

    ECHO BAY MINES LTD, ANNUAL REPORTS 1995, 1996.

General comments

Subject category Comment text
Deposit THE LUPIN GOLD PROJECT IS THE THIRD LARGEST GOLD MINE IN CANADA. NO DISCOVERY METHOD WAS SPECIFIED FOR THE LUPIN PROJECT. LUPIN MAY ALSO BE KNOWN AS CONTWYO LAKE

Reporter information

Type Date Name Affiliation Comment
Reporter 16-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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