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Gibraltar

Producer in British Columbia, Canada with commodities Copper, Gold, Molybdenum, 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. Nearby scientific data
  7. Ore body information
  8. Economic information about the deposit and operations
  9. Mining district
  10. Mineral rights holdings
  11. Ownership information
  12. Production statistics
  13. Reserves and resources
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10206116
MAS/MILS ID 1220100010
Record type Site
Current site name Gibraltar
Alternate or previous names Gibraltar Mine, Gibraltar East Zone, Pollyanna Zone, Gibraltar West Zone, Cuisson, Granite Lake Zone

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -122.28136, 52.51983 (WGS84)
Elevation 1050
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 British Columbia

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Molybdenum Secondary
Silver Secondary

Nearby scientific data

Ore Body (1) -122.28136, 52.51983
ListMap

Economic information

Ore body information

  • Strike N90E
    Dip 25S
    Thickness 425M
    Length 4000M
    Width 1500M
    Depth to top 70M
    Field Value
    MAS Matrix # 1
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 MASSIVE
    Type of Orebody #2 STOCKWORK
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control IGNEOUS
    Secondary Ore Control FRACTURING
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 POTASSIC
    Type of Wallrock Alter. #2 SERICITIC
    Strike And Dip N90E:25S
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 810106
  • Area 900HA
    Field Value
    Total Surface Area (HA) 900
    Date of Last Modification 910418

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Metallic
Significant Yes
Discovery year 1963
Mining method Open Pit
Year of first production 1972
Milling method Flotation

Mining district

District name Caribou District

Mineral rights holdings

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

Ownership information

  • Type Operator
    Owner Gibraltar Mines Ltd.
    Home office Canada
    Year 1994
  • Type Owner
    Owner Placer Dome Inc.
    Interest 44
    Home office Canada
    Year 1994

Production statistics

  • Year 1972
    Description Mill Feed @ 0.44% Cu 9853000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 9853000mt 0wt-pct
  • Year 1973
    Description Mill Feed @ 0.484% Cu 13682000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 1368200mt 0wt-pct
  • Year 1974
    Description Mill Feed @ 0.40% Cu 12154000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 1215400mt 0wt-pct
  • Year 1975
    Description Mill Feed @ 0.43% Cu 10388000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 1038800mt 0wt-pct
  • Year 1976
    Description Mill Feed @ 0.45% Cu 7672000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 7672000mt 0wt-pct
  • Year 1977
    Description Mill Feed @ 0.38% Cu 12765000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 1276500mt 0wt-pct
  • Year 1978
    Description Mill Feed @ 0.38% Cu 5136000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 5136000mt 0wt-pct
  • Year 1979
    Description Mill Feed @ 0.42% Cu 10446000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 1044600mt 0wt-pct
  • Year 1980
    Description Mill Feed @ 0.38% Cu 12644000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 1264400mt 0wt-pct
  • Year 1981
    Description Mill Feed @ 0.38% Cu, 0.014% Mo 12100000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Molybdenum Molybdenum 0wt-pct
    Major Ore Copper Copper 0wt-pct
  • Year 1982
    Description Mill Feed @ 0.28% Cu, 0.010% Mo 13379000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Molybdenum Molybdenum 0wt-pct
    Major Ore Copper Copper 0wt-pct
  • Year 1983
    Description Mill Feed @ 0.27% Cu, 0.010% Mo 13517000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Molybdenum Molybdenum 0wt-pct
    Major Ore Copper Copper 0wt-pct
  • Year 1984
    Description Mill Feed @ 0.31% Cu, 0.009% Mo 13142000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Molybdenum Molybdenum 0wt-pct
    Major Ore Copper Copper 0wt-pct
  • Year 1985
    Description Mill Feed @ 0.33% Cu, 0.013% Mo 13401000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 0wt-pct
    Trace Ore Molybdenum Molybdenum 0wt-pct
  • Year 1986
    Description Mill Feed @ 0.31% Cu, 0.010% Mo 12183000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Molybdenum Molybdenum 0wt-pct
    Major Ore Copper Copper 0wt-pct
  • Year 1987
    Description Mill Feed @ 0.35% Cu, 0.009% Mo 12576000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Molybdenum Molybdenum 0wt-pct
    Major Ore Copper Copper 0wt-pct
  • Year 1988
    Description Mill Feed @ 0.32% Cu, 0.014% Mo 5473000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Molybdenum Molybdenum 0wt-pct
    Major Ore Copper Copper 0wt-pct
  • Year 1989
    Description Mill Feed @ 0.29% Cu, 0.017% Mo 12000000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Molybdenum Molybdenum 0wt-pct
    Major Ore Copper Copper 0wt-pct
  • Year 1990
    Description Mill Feed @ 0.30% Cu, 0.018% Mo 11700000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 0wt-pct
    Trace Ore Molybdenum Molybdenum 0wt-pct
  • Year 1991
    Description Mill Feed @ 0.31% Cu 11900000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 0wt-pct
  • Year 1992
    Description Mt Ore
  • Year 1993
    Description .306% Cu 8989000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 8989000mt 0wt-pct

Comments on the production information

  • NO COSTS ARE ENTERED FOR MOLYBDENUM MILL CIRCUIT OR FOR MOLYBEDENUM CONCENTRATE TRANSPORTATION BECAUSE OF THE HISTORY OF INTERMITTENT MOLYBDENUM PRODUCTION AT THE GIBRALTER MINE. THE OUTPUT TONNAGE FOR MOLYBDENUM CONCENTRATE IS A MAXIMUM OUTPUT. THE MINE TEMPORARILY CLOSED DOWN IN DEC.1994. MILL EXPANSION WAS DROPPED TO PURSUE OTHER PROJECTS.
  • THE EXACT COPPER RECOVERY USED FOR CALCULATING COPPER GRADE IN THE MOLYBDENUM CONCENTRATE IS 0.016 PERCENT.

Reserves and resources

  • Type In-situ
    Estimate year 1993
    Indicated 165800000mt ore
    Demonstrated 165800000mt ore
    Total resources 165800000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.312 wt-pct Copper Major 1993
    Molybdenum Mo 0.0088 wt-pct Molybdenum Minor 1993
  • Type In-situ
    Estimate year 1994
    Indicated 75503000mt ore
    Demonstrated 75503000mt ore
    Total resources 75503000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.301 wt-pct Copper Major 1994
    Molybdenum Mo 0.01 wt-pct Molybdenum Minor 1994
  • Type In-situ
    Estimate year 1994
    Indicated 228647000mt ore
    Demonstrated 228647000mt ore
    Total resources 228647000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.284 wt-pct Copper Major 1994
    Molybdenum Mo 0.007 wt-pct Molybdenum Minor 1994
  • Type In-situ
    Estimate year 1994
    Indicated 187448000mt ore
    Demonstrated 187448000mt ore
    Total resources 187448000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.301 wt-pct Copper Major 1994
    Molybdenum Mo 0.0095 wt-pct Molybdenum Minor 1994
  • Type In-situ
    Estimate year 1995
    Demonstrated 166295000mt ore
    Total resources 166295000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.291 wt-pct Copper Major 1995
    Molybdenum Mo 0.009 wt-pct Molybdenum Minor 1995
  • Type In-situ
    Estimate year 1995
    Demonstrated 467734000mt ore
    Total resources 467734000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.286 wt-pct Copper Major 1995
    Molybdenum Mo 0.007 wt-pct Molybdenum Minor 1995
  • Type In-situ
    Estimate year 1995
    Demonstrated 631029000mt ore
    Total resources 631029000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.287 wt-pct Copper Major 1995
    Molybdenum Mo 0.008 wt-pct Molybdenum Minor 1995

Comments on the reserve resource information

  • INT. MIN., 5/89, P96; MIN. J, 3/3/89, P179. (12/31/88) PLACER DOME INC., 1989 AR. (12/31/89)
  • MAT 1, COL 1 = TOTAL RESERVES; COL 2 = HIGH GRADE, COL 3 = LOW GRADE. MATRIX 2 CONTAINS THE WASTE MATERIAL USED FOR THE SX-EW LEACHING.
  • THE POLLYANNA OREBODY WAS DEPLETED IN 1993. GIBRALTAR E PIT WILL SUPPLIES ALL MILL FEED.

Workings at the site

  • Type of workings Surface
    Area 475HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OPEN PIT
    Swell Factor .57
    Percent Waste Rock 52.9
    Avg. Overburden Thickness 70
    Primary Material Cover SAND, GRAVEL
    Percentage 80
    Secondary Material Cover M-HARD ROCKS
    Percentage 20
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 14
    Max. Pit Slope (degrees) 45
    Capacity 32857
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 3000
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 3
    Year of Information 1986

Comments on other economic factors

  • COPPER CONCENTRATE SHIPPED TO MITSUBISHI SMELTER/REFINERY AT NAOSHIMA, JAPAN (EXACT COORDINATES ARE UNKNOWN - TOKYO COORDINATES ASSUMED). TRANSPORTATION COST FOR TRUCK ESTIMATED BY CES METHOD (BIBLIOGRAPHY DATA SET LINES I015-17), FOR RAIL PROVIDED BY BRITISH COLUMBIA RAILROAD, FOR SHIP PROVIDED BY MAFO.

Reference information

Bibliographic references

  • Deposit

    NORTHERN MINER. CANADIAN MINES HANDBOOK, 1973-1974. P. 137

  • Deposit

    NORTHERN MINER. CANADIAN MINES HANDBOOK, 1975-76. P. 121.

  • Production

    SKILLINGS MINING REVIEW-DECEMBER 11, 1993.

  • Reserve-Resource

    PLACER DOME INC., 1993 ANNUAL REPORT, P. 14, 16.

  • Reserve-Resource

    GIBRALTAR MINES LTD., 1993 ANNUAL REPORTS, P. 15.

  • Reserve-Resource

    PLACER DOME INC., 1994 ANNUAL REPORT, P.17,19.

  • Reserve-Resource

    NORTHERN MINER. CANADIAN MINES HANDBOOK, 1980-81. P.109-110

  • Reserve-Resource

    CANADIAN RESERVES OF COPPER, NICKEL, LEAD, ZINC, MOLYBDENUM,

  • Reserve-Resource

    SILVER AND GOLD AS OF JAN. 1, 1978, MR 185. GIBRALTAR

  • Reserve-Resource

    MINES LTD. P. 16.

  • Reserve-Resource

    CANADIAN MINES HANDBOOK 1986-87, NORTHERN MINER PRESS,P.159.

  • Reserve-Resource

    MINE RESERVES AND CURRENTLY PROMISING DEPOSITS, JAN. 1985,

  • Reserve-Resource

    EMR CANADA, MR 209, P. 23.

  • Reserve-Resource

    GIBRALTER MINES LTD., 1989 ANNUAL REPORT: P. 4.

  • Reserve-Resource

    PLACER DOME CORP., 1991 ANNUAL REPORT, P. 20.

  • Reserve-Resource

    CANADIAN MINES HANDBOOK,1992-1993, P-157.

  • Deposit

    BROWN, A. SUTHERLAND. GIBRALTAR MINE. B.C. DEPT. OF MINES

  • Deposit

    AND PET. RES., G.E.M., 1973, PP. 24, 299-318.

  • Deposit

    CIM BULLETIN. GIBRALTAR, PLACER DEVELOPMENT AND NEWEST MINE

  • Deposit

    AUG. 1972, P. 93.

  • Deposit

    CANADIAN MINING JOURNAL. GIBRALTAR TO PRODUCE COPPER TO THE

  • Deposit

    YEAR 2000. AUG. 1976, P. 18.

  • Deposit

    DRUMMOND, A.D., ET AL. GIBRALTAR--REGIONAL METAMORPHISM,

  • Deposit

    MINERALIZATION, HYDROTHERMAL ALTERATION AND STRUCTURAL

  • Deposit

    DEVELOPMENT, ED. BY A. SUTHERLAND BROWN. PORPHYRY

  • Deposit

    DEPOSITS OF THE CANADIAN CORDILLERA, CIM SPECIAL VOLUME

  • Deposit

    15, 1976, PP. 195-205.

  • Deposit

    DRUMMOND, A.D., S.J. TENNANT AND R.J. YOUNG. THE INTER-

  • Deposit

    RELATIONSHIP OF REGIONAL METAMORPHISM, HYDROTHERMAL

  • Deposit

    ALTERATION AND MINERALIZATION AT THE GIBRALTAR MINES

  • Deposit

    COPPER DEPOSIT IN B.C. CIM BULLETIN, FEB. 1973.

  • Deposit

    ENGINEERING AND MINING JOURNAL. GIBRALTAR COMES ON STREAM

  • Deposit

    IN BRITISH COLUMBIA. JULY 1972, PP. 92-93.

  • Deposit

    INAMDAR, A. AND M. REDFERN, GIBRALTAR MINES LIMITED; MILLING

  • Deposit

    PRACTICE IN CANADA, CIM SPECIAL VOLUME 16, 1978, P.106-9.

  • Deposit

    MINING MAGAZINE. GIBRALTAR IN PRODUCTION. JULY 1972,

  • Deposit

    PP. 37, 39, 41.

  • Deposit

    PENNINGTON, D.J. WATER SUPPLY AND TAILINGS DISPOSAL.

  • Deposit

    WESTERN MINER, JUNE 1972, PP. 23-25, 28, 30, 34.

  • Deposit

    ROTHERHAM, D.C., S.J. TENNANT AND A.D. DRUMMOND. GIBRALTAR

  • Deposit

    MINES LTD. WESTERN MINER, JUNE 1972, PP. 40-52.

  • Deposit

    STEPHENS, FRED H. A PROSPECT THAT BECAME A MINE--GIBRALTAR

  • Deposit

    SHOWS PROMISE. WESTERN MINER, JUNE 1972, P. 6.

  • Deposit

    WESTERN MINER. GIBRALTAR. AUG. 1976, PP. 36-37, 40.

  • Deposit

    WESTERN MINER. GIBRALTAR MINES LTD.--HISTORY, GEOLOGY,

  • Deposit

    EXPLORATION. JUNE 1972, P. 40-52.

  • Deposit

    WESTERN MINER. WATER RESOURCES OF THE MINING INDUSTRY IN

  • Deposit

    BRITISH COLUMBIA. DEC. 1974, PP. 33, 36, 38, 40.

  • Deposit

    WORLD MINING (U.S. EDITION). GIBRALTAR COPPER MINE STARTS

  • Deposit

    UP MILLING 36,000 DAILY TONS. JULY 1972, PP. 36-39.

  • Deposit

    GIBRALTAR MINES LTD. STAFF, GIBRALTAR MINES LTD. (N.P.L.);

  • Deposit

    IN MINERAL INDUSTRIES IN WESTERN CANADA, THE TENTH

  • Deposit

    COMMONWEALTH MINING AND METALLURGICAL CONGRESS- SEPT. 2-

  • Deposit

    28, 1974, SECTION VI, ARTICLE N, P.1-23.

  • Deposit

    O'ROURKE, J.C., THE START-UP AND OPERATION OF THE GIBRALTER

  • Deposit

    MINES SX-EW PLANT: CIM BULL., DEC. 1988, P. 61-64.

  • Deposit

    BRUYNESTEYN, A., LINDSAY, DEAN, AND O'ROURKE, J.C.,

  • Deposit

    DEVELOPEMENT OF DUMP LEACH OPERATIONS AT GIBRALTER MINES

  • Deposit

    LTD.

  • Deposit

    ANDERSON, SCOTT, GIBRALTER COPPER-MOLYBDENUM PRODUCER HAS

  • Deposit

    BECOME LOW COST OPERATION; CANADIAN MINING JOURNAL,

  • Deposit

    JUNE 1990, P. 41-46.

  • Deposit

    NORTHERN MINER, GIBRALTER SURVIVED DOWNTURNS TO PROFIT WHEN

  • Deposit

    COPPER IS UP, JUNE 18, 1990, P. A13.

  • Deposit

    THE NORTHERN MINER, 4/23/90, P. 24.

  • Deposit

    THE NORTHERN MINER, 9/23/91, P. 20.

  • Deposit

    THE NORTHERN MINER, 6/15/92, P. 6.

  • Deposit

    THE NORTHERN MINER, 3/2/92, P. 20.

  • Deposit

    THE NORTHERN MINER, 5/11/92, P. 16.

  • Deposit

    THE NORTHERN MINER MAGAZINE, "OPEN PIT GIANTS OF BRITISH

  • Deposit

    COLUMBIA", 7/92, PP. 11-13.

  • Deposit

    THE NORTHERN MINER MAGAZINE, "TWO DECADES ON A

  • Deposit

    ROLLERCOASTER", 11/92, PP. 14-17.

  • Deposit

    METALS BULLETIN, 3/18/93, P. 5.

  • Deposit

    METALS WEEK, 4/19/93, P. 5.

  • Deposit

    METALS BULLETIN, 4/22/93, P. 9.

  • Deposit

    AMERICAN METAL MARKET, 7/7/93, P. 2.

  • Deposit

    METALS BULLETIN, 7/12/93, P. 6.

  • Deposit

    METALS BULLETIN, 8/9/93, P. 7.

  • Deposit

    SKILLINGS' MINING REVIEW, 7/24/93, P. 15.

  • Deposit

    PLACER DOME PRESS RELEASE, 8/12/93.

  • Deposit

    SKILLINGS' MINING REVIEW, 8/28/93, P. 19.

  • Deposit

    MINING RECORD, 9/15/93, P. 5.

  • Deposit

    AMERICAN METAL MARKET, 9/29/93, P. 4.

  • Deposit

    AMERICAN METAL MARKET, 11/30/93, P. 2.

  • Deposit

    METAL BULLETIN, 3/8/93, P. 12.

  • Deposit

    SKILLINGS' MINING REVIEW, 11/20/93, P. 9.

  • Deposit

    THE NORTHERN MINER, 11/15/93, P. 14.

  • Deposit

    THE NORTHERN MINER, 12/6/93, P. 1.

  • Deposit

    AMERICAN METAL MARKET, 3/31/94, P. 2.

  • Deposit

    AMERICAN METAL MARKET, 7/21/94, P. 2.

  • Deposit

    PLATT'S METALS WEEK, 7/25/94, P. 3.

  • Deposit

    AMERICAN METAL MARKET, 7/26/94, P. 16.

  • Deposit

    SKILLINGS MINING REVIEW, 7/30/94, P. 56.

  • Deposit

    SKILLINGS', 4/30/94, P.7.

  • Deposit

    AMERICAN METAL MARKET, 5/4/94, P.7.

  • Deposit

    AMERICAN METAL MARKET, 9/30/94, P.5.

  • Deposit

    METALS WEEK, 10/3/94, P.7.

General comments

Subject category Comment text
Deposit EVALUATION IN DEC. 1980 BY I.F.O.C.,DENVER, COLORADO, USING DATA COLLECTED BY GOLDER ASSOCIATES, INC., FOR BUREAU OF MINES CONTRACT J02950059 (MINERALS AVAILABILITY SYSTEM).

Reporter information

Type Date Name Affiliation Comment
Reporter 24-SEP-1996 Porter, Kenneth E. U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

  • Placer Dome Inc. — acquired by Subsidiary of Barrick Gold (2006)
    Acquired by Barrick Gold in 2006.

Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.

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