1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Miramar Con

Plant in Northwest Territories, Canada with commodities Gold, Silver
Map
XML
JSON
KML
B
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 10205972
MAS/MILS ID 1220300003
Record type Site
Current site name Miramar Con
Alternate or previous names Con-Rycon, Nerco Con, Robertson, Ry Con, Vol, Rycon, Yellorex

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -114.33472, 62.43341 (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
Pyrite Unknown
Quartz Unknown

Nearby scientific data

Ore Body (1) -114.33472, 62.43341
ListMap

Economic information

Ore body information

  • Strike N20E
    Dip 60W
    Length 60M
    Area 632HA
    Depth to top 1400M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 LENTICULAR
    Shape of Orebody #2 IRREGULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Degree of Wallrock Alter. NONE
    Strike And Dip N20E:60W
    Total Surface Area (HA) 632
    Date of Last Modification 930603

Comments on the geologic information

  • SIO2 CONTENT OF THE ORE IS 30-90%.

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1934
Mining method Filled Stopes - Horiz Cut and Fill W/Waste Rock
Year of first production 1937
Plant type Leach
Plant subcategory Hydromet
Milling method Hydrometallurgy Unspecified

Mining district

District name Yellowknife District

Mineral rights holdings

Type of mineral rights Located Claim

Ownership information

  • Type Owner-Operator
    Owner Miramar Mining Corp.
    Interest 100
    Home office Canada
    Year 1996
    First year 1993
  • Type Owner-Operator
    Owner Nerco Minerals Co., (Nerco Inc.)
    Interest 100
    Home office Canada
    Year 1991
    Last year 1993

Comments on the ownership information

  • IN FEBRUARY 1993, KENNECOTT CORPORATION SAID IT WILL PURCHASE NERCO INC. COMPLETION OF THE ACQUISITION MUST BE APPROVED BY NERCO INC SHAREHOLDERS AND RELEVANT GOVERNMENT AGENCIES. MIRAMAR MINING CORPORATION ACQUIRED NERCO CON MINE IN OCT 1993.

Production statistics

  • Year 1966
    Description Ore Milled 70750 Metric Tons Per Year
  • Year 1970
    Description Ore Milled 63500 Metric Tons Per Year
  • Year 1974
    Description Ore Milled 131530 Metric Tons Per Year
  • Year 1977
    Description Ore Milled 142419 Metric Tons Per Year
  • Year 1979
    Description Ore Milled 196839 Metric Tons Per Year
  • Year 1980
    Description Ore Milled 192309 Metric Tons Per Year
  • Year 1985
    Description 13.3g Au Feed 198091 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 198091mt 13g/mt
  • Year 1986
    Description 13.0g Au Feed 218182 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 218182mt 13g/mt
  • Year 1987
    Description 13.0g Au Feed 210000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 210000mt 13g/mt
  • Year 1988
    Description 12.9g Au Feed 195224 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 195224mt 13g/mt
  • Year 1989
    Description 12.5g Au Feed 244133 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 244133mt 13g/mt
  • Year 1990
    Description 12.8g Au Feed 302727 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 302727mt 13g/mt
  • Year 1995
    Description Ore Milled @ 0.307 Opt 447682 St
  • Year 1995
    Description Gold Produced 122010 T Oz/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 3794935.71g
  • Year 1996
    Description Ore Milled @ 0.298 Opt 414113 St
  • Year 1996
    Description Gold Produced 111021 T Oz/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 3453139.56g

Comments on the production information

  • THE DORE BULLION PRODUCT CONTAINS BOTH SILVER AND GOLD CONCENTRATES, WHICH ARE SEPARATED AT THE ROYAL CANADIAN MINT IN OTTAWA.

Reserves and resources

  • Type In-situ
    Estimate year 1989
    Demonstrated 2780522mt ore
    Total resources 2780522mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 10.7 g/mt Gold Major 1989
    Silver Ag 2.37 g/mt Silver Minor 1989
  • Type In-situ
    Estimate year 1991
    Demonstrated 3118311mt ore
    Total resources 3118311mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 10.29 g/mt Gold Major 1991
    Silver Ag 2.64 g/mt Silver Minor 1991
  • Type In-situ
    Estimate year 1991
    Inferred 721000mt ore
    Total resources 721000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 8.9 g/mt Gold Major 1991
    Silver Ag 2.3 g/mt Silver Minor 1991
  • Type In-situ
    Estimate year 1991
    Inferred 307000mt ore
    Total resources 307000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 4.8 g/mt Gold Major 1991
    Silver Ag 1.2 g/mt Silver Minor 1991
  • Type In-situ
    Estimate year 1991
    Total resources 4146000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 9.6 g/mt Gold Major 1991
    Silver Ag 2.5 g/mt Silver Minor 1991
  • Type In-situ
    Estimate year 1997
    Demonstrated 3211000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 11.3 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1991
    Demonstrated 3118311mt ore
    Total resources 3118311mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 10.29 g/mt Gold Major 1991
    Silver Ag 2.64 g/mt Silver Minor 1991

Comments on the reserve resource information

  • MATRIX 1 COL 1 DATA FOR 1986 PROPERTY EVAL/AVAILABILITY STUDY. MATRIX 1 COL 3 DATA FOR 1993 PROPERTY EVAL/AVAILABILITY STUDY.
  • RESERVE DATE 12/31/96:

Workings at the site

  • Type of workings Underground
    Overall depth 1656M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method HORIZ CUT & FILL W/TAILINGS 10-60
    Percent Recovery 95
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics UNKNOWN
    Rock Support Chars. SUPPORTING
    Mine Support Chars. OPEN STEEL SETS
    Number of Shafts 4
    1st Condition of Workings OPEN
    Capacity 767.5
    Capacity Units MT ORE/DAY
    Unit Production Cost 70.15
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 2
    Year of Information 1982

Comments on other economic factors

  • THE DEEPEST SHAFT IS THE ROBERTSON SHAFT.

Reference information

Bibliographic references

  • Production

    MIRAMAR MINING CORPORATION, 1996 ANNUAL REPORT, (95-96 DATA)

  • Reserve-Resource

    CANADIAN MINES HANDBOOK, 1991-92, PP, 266, 267.

  • Reserve-Resource

    CANADIAN MINES HANDBOOK, 1992-93, PAGE 251.

  • Reserve-Resource

    NERCO INC, 1991, 10K, PAGES 19, 20.

  • Reserve-Resource

    MIRAMAR MINING CORPORATION 1996 ANNUAL REPORT, P14.

  • Deposit

    ANNUAL REPORTS - COMINCO (1966-1980).

  • Deposit

    ACRES DAVEY MCKEE LTD. GOLD MINING IN CANADA 1981.62 PP.

  • Deposit

    CANADIAN MINING HANDBOOK (1981). PP. 87-90, 299-300.

  • Deposit

    COMINCO LTD. CON MINES - YELLOWKNIFE, NORTHWEST

  • Deposit

    TERRITORY (1974). IN MINERAL INDUSTRIES IN WESTERN CANADA,

  • Deposit

    THE 10TH COMMONWEALTH MINING AND METALLURGICAL CONGRESS,

  • Deposit

    SEPT. 2-29, 1974.

  • Deposit

    ELGI, D.H. AND MACPHAIL, A.D. CON OPERATIONS. IN

  • Deposit

    MILLING PRACTICE IN CANADA, COMINCO LTD. CIM SPEC., VOL. 16,

  • Deposit

    1978, PP. 56-57.

  • Deposit

    FISH, R. CONSTANT CHANGE KEEPS CON MINE UP TO DATE.

  • Deposit

    CANADIAN MINING JOURNAL, VOL. 102, NO. 5, 1981: SOUVENIR

  • Deposit

    ISSUE: 75 YEARS 1906 TO 1981 COMINCO, PP. 101-112.

  • Deposit

    NORTHERN MINER. OCT. 18, 1979.

  • Deposit

    NORTHERN MINER. COMINCO'S CON MINE LIVES UP TO ITS

  • Deposit

    HERITAGE. N.M., AUGUST 3, 1978, PP. 1-2.

  • Deposit

    -----. NORTH SIXTY. COMINCO PUBLICATIONS, JUNE 9, 1976.

  • Deposit

    E & MJ. COMINCO'S CON MINE HOISTS 650 T/D THROUGH

  • Deposit

    ROBERTSON SHAFT. FEB. 1982, PP. 83-85.

  • Deposit

    MINERALS ECONOMICS GROUP, ACTIVE CANADIAN GOLD MINES, AUG.91

  • Deposit

    CANADIAN MINES HANDBOOK, 1990-91, P324.

  • Deposit

    CANADIAN MINES HANDBOOK, 1996-97, PP. 283-284, 479.

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.

Maps centered on this site