Lucky Friday Mine

Past Producer in Shoshone county in Idaho, United States with commodities Lead, Silver, Gold, Zinc, Copper, Antimony, Cadmium

Geologic information

Identification information

Deposit ID 10257227
MRDS ID W026639
MAS/MILS ID 0160790012
Record type Site
Current site name Lucky Friday Mine
Alternate or previous names Golden Hunter Mine ( old MAS# 0160790063), Gold Hunter

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -115.77932, 47.47237 (WGS84)
Elevation 1050
Location accuracy 100(meters)
(click for info)

Geographic areas

Country State County
United States Idaho Shoshone

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 048 N 005 E 25,26,33,35 Idaho

Commodities

Commodity Importance
Lead Primary
Silver Primary
Gold Secondary
Zinc Secondary
Copper Tertiary
Antimony Tertiary
Cadmium Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Sphalerite Ore
Tetrahedrite Ore
Pyrite Gangue
Quartz Gangue
Siderite Gangue
Matildite Trace
Pyrargyrite Trace
Polybasite Trace
Bournonite Trace
Jamesite Trace
Arsenopyrite Trace
Pyrrhotite Trace
Greenockite Trace
Cerrusite Trace
Limonite Trace

Alteration

  • (Local) Bleaching

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock unit name Revett Formation
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock unit name Wallace Formation
  • Host or associated Host
    Rock unit name St Regis Formation
  • Host or associated Host
    Rock unit name Burke Formation
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale

Nearby scientific data

Main Entrance (1) -115.77932, 47.47237

Geologic structures

Type of structure Local
Structural terms Hook Anticline
Structure description Hook Anticline, plunges 75 degrees, hosts vein

Ore body information

  • General form Tabular
    Strike N80W
    Dip 80S
    Thickness 1000M
    Depth to top 1M
    Width 3000M
    Length 5000M
    Area 50HA
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 DISSEMINATED
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control FRACTURING
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 BLEACHING
    Strike And Dip N80W
    Avg. Thick. Unconsol. Mat. 1
    Total Surface Area (HA) 50
    Date of Last Modification 970103

Controls for ore emplacement

  • Faulting:
  • Fracturing:

Economic information

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant Yes
Discovery year 1880
Discoverer J.F. Ingalls
Discovery method Ore-Mineral In Place
Mining method Caving Methods - Longwall Caving
Year of first production 1942
Year of last production 2001
Production years 1942-2001
Plant type Beneficiation (Mill)
Plant subcategory Flotation
Milling method Flotation

Mining district

District name Hunter District

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Located Claim

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Lucky Friday Mines Co.
    Interest 100
    First year 1905
    Last year 1913
  • Type Owner-Operator
    Owner Lucky Friday Mining Co.
    Interest 100
    Home office Wallace, Idaho
    First year 1913
    Last year 1936
  • Type Owner-Operator
    Owner Lucky Friday Silver-Lead Mines Co.
    Interest 100
    Home office Wallace, Idaho
    First year 1939
    Last year 1964
  • Type Owner-Operator
    Owner Hecla Mining Co.
    ID 1000088
    Interest 100
    Home office 6500 North Mineral Drive Suite 200 Coeur d'Alene ID 83815-9408 United States
    Year 1996
    First year 1964

Production statistics

  • Year 1991
    Material Ore milled
    Ore mined 138,028mt
    Accuracy Accurate
    Description Ore Production 138028 Mt Ore Milled
  • Year 1992
    Material Ore milled
    Ore mined 158,912mt
    Accuracy Accurate
    Description Ore Production 158912 Mt Ore Milled
  • Year 1993
    Material Ore milled
    Ore mined 162,911mt
    Accuracy Accurate
    Description Ore Production 162911 Mt Ore Milled
  • Year 1994
    Material Ore milled
    Ore mined 113,385mt
    Accuracy Accurate
    Description Ore Production 113385 Mt Ore Milled
  • Year 1995
    Material Ore milled
    Ore mined 144,128mt
    Accuracy Accurate
    Description Ore Production 144128 Mt Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Gold Gold 25,816g
    Major Silver Silver 51,715,944g
  • Year 1996
    Material Ore milled
    Ore mined 170,800mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Gold Gold 29,455g
    Major Lead Lead 19,030mt
    Major Silver Silver 59,293,592g
    Minor Zinc Zinc 3,315mt
  • Year 2010
    Period 1942-2010
    Material 147 milllion oz Ag, 1.1 million tons Pb/Zn combined. Hecla 2010 AR, p. 6.
    Best? Y
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary metal Silver Silver 4,570mt

Reserves and resources

  • Type In-situ
    Estimate year 1984
    Demonstrated 470,000mt ore
    Measured 470,000mt ore
    Total resources 470,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 586.2999 g/mt Silver Major 1984
    Lead Pb 12.1999 wt-pct Lead Major 1984
    Zinc Zn 1.2 wt-pct Zinc Minor 1984
  • Type In-situ
    Estimate year 1985
    Demonstrated 608,100mt ore
    Measured 608,100mt ore
    Total resources 608,100mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 569.1 g/mt Silver Major 1985
    Lead Pb 11.9 wt-pct Lead Major 1985
    Zinc Zn 1.8999 wt-pct Zinc Minor 1985
  • Type In-situ
    Estimate year 1990
    Demonstrated 416mt ore
    Indicated 416mt ore
    Total resources 416mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 552 g/mt Silver Major 1990
    Lead Pb 14.4 wt-pct Lead Major 1990
    Zinc Zn 2.4 wt-pct Zinc Minor 1990
  • Type In-situ
    Estimate year 1991
    Demonstrated 399,000mt ore
    Total resources 399,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 466.28 g/mt Silver Major 1991
    Lead Pb 12.8 wt-pct Lead Major 1991
    Zinc Zn 2.8 wt-pct Zinc Minor 1991
  • Type In-situ
    Estimate year 1995
    Demonstrated 409mt ore
    Indicated 409mt ore
    Total resources 409mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 478.2773 g/mt Silver Major 1995
    Lead Pb 13.3 wt-pct Lead Major 1995
    Zinc Zn 2.8 wt-pct Zinc Minor 1995
  • Type In-situ
    Estimate year 1995
    Inferred 2,218mt ore
    Total resources 2,218mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 354.58 g/mt Silver Major 1995
    Lead Pb 13.3 wt-pct Lead Major 1995
    Zinc Zn 2.8 wt-pct Zinc Minor 1995
  • Type In-situ
    Estimate year 1996
    Demonstrated 3,803,000mt ore
    Measured 3,803,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 511 g/mt Silver Major 1996
    Lead Pb 11.3 wt-pct Lead Major 1996
    Zinc Zn 2.2 wt-pct Zinc Minor 1996
  • Type In-situ
    Estimate year 1996
    Inferred 20,460,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 320 g/mt Silver Major 1996
    Lead Pb 5.4 wt-pct Lead Major 1996
    Zinc Zn 1.5 wt-pct Zinc Minor 1996
  • Type In-situ
    Estimate year 1996
    Total resources 23,463,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 350 g/mt Silver Major 1996
    Lead Pb 6.3 wt-pct Lead Major 1996
    Zinc Zn 1.6 wt-pct Zinc Minor 1996
  • Type In-situ
    Name Proven and Probable
    Estimate year 2010
    Proved 1,489,700mt ore
    Remarks Hecla 2010 AR, p. 12.
    Commodity Subtype Grade units Group Importance Year
    Lead 7.8 wt-pct Lead Primary 2010
    Zinc 2.8 wt-pct Zinc Secondary 2010
    Silver 425 g/mt Silver Primary 2010

Comments on the reserve resource information

  • 1996: Measured Grades: Ag=401 G/Mt; Pb=11.6%; Zn=1.8%. 1996: Indicated Grades (From New Area): Ag=290 G/Mt; Pb=4.1%; Zn=Not Given In The Phone Call (0? Or Unknown?) All Tonnage And Assay Values Are Based On Dry Tonnes Total Metal Recovery Is 105% Vs Reserves, Total Tonnage Recovered Is 130% Vs Reserve Reserve Tonnages Only Are Quoted In Hecla Published Figures. Grades Are Computed Back Through Metal Recovered And Recovery Factors. As The Recovery Of Cu And Au Are Unknown This Method Could Not Be Employed For These Commodities. They Were Therefore Carried Through At 100%.
  • 86 Brook-Hunt & Ilzsg Data. Hecla 1989 10k Has 458,800 St At 16.1 Oz Ag, 14.4% Pb, And 2.4% Zn.

Workings at the site

  • Type of workings Underground
    Overall depth 1900M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method LONGWALL CAVING 10-108
    Swell Factor .6
    Percent Waste Rock 10
    Percent Recovery 100
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 4
    Length of Inclines (m) 0
    Avg. Length of Adits (m) 300
    Number of Adits 2
    1st Condition of Workings OPEN
    Capacity 500
    Capacity Units MT ORE/DAY
    Unit Production Cost 97.5
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 2
    Year of Information 1990
  • Type of workings Underground
    Field Value
    MAS Development Schedule # 2
    Mining Record # 1
    Mining Method UNDERHAND 10-35
    Unit Production Cost 45.53
    Year of Information 1996

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
U.S. Bureau of Mines Minerals Availability System MAS 0160790012
USGS Mineral Resources Data System MRDS W026639 MAS references MRDS
Mine Safety and Health Administration MSHA MSHA 1000088
Idaho Geological Survey Idaho Mines and Prospects IMP WL_421 http://www.idahogeology.org/

Bibliographic references

  • Production

    Hecla Mining Company, 1995 Annual Report, P19.

  • Production

    Yearly Hecla Annual Reports (1983 - present)

  • Reserve-Resource

    Hecla Minco, 1983, Annual Report For Fy 1983.

  • Reserve-Resource

    Hecla Mining Co. 1985 Annual Report

  • Reserve-Resource

    Hecla Mining Co., 1989, Form 10k, 3/19/90

  • Deposit

    Brakenbusch, Silver Shaft Development. Pres. At Nwma Short Course, Spokane, Wa, Nov. 28-30, 1983.

  • Deposit

    Campbell, Guidebook To The Geology Of The Coeur D' Alene Mining District. Id Bumines And Geol. Bulletin 16, 1961, 37 Pp.

  • Deposit

    Crandell, The Silver Shaft Project At The Lucky Friday Mine. Paper Pres. At The Nwma Convention, Spokane, Wa, 1980.

  • Deposit

    Crandell, & Others. Designing Lucky Friday'S Silver Shaft. E & Mj, Apr. 1981, Pp. 68-73.

  • Deposit

    Day, H. C. The Coeur D'Alene Mining District In 1963. Id Bureau Of Mines And Geol. Pamphlet 133, 1963, 104 Pp.

  • Deposit

    E & Mj. Programming New Growth In The Coeur D'Alene, Apr. 1980, Pp. 62-66; Part 2, May 1980, Pp. 94-99.

  • Deposit

    Fryklund, Ore Deposits Of The Coeur D'Alene District, Shoshone County, Idaho: USGS P.P. 445, 1964, 103 Pp.

  • Deposit

    Gott, And Cathrall, Geochemical-Exploration Studies In The Coeur D'Alene District, Idaho And Montana: USGS Pp 1116, 1980, 63 Pp.

  • Deposit

    Gross, The New Lucky Friday Mine. Pres. At The 1984 Pacific Northwest Met. And Miner. Conf., Portland, Or, Apr. 30- May 2, 1984, 14 Pp.

  • Deposit

    Hecla Mining Company. Annual Report. 1976, 1978, 1979, 1980, 1981, 1982, 1983.

  • Deposit

    ----. Lucky Friday Mine. Unpubl. Pamphlet, 1981, 4 Pp.

  • Deposit

    Hecla Mining Compay. Form 10-K Report To The Sec. Dec. 31, 1983.

  • Deposit

    ----. Joint Proxy Statement-Prospectus For Merger With Ranchers Exploration And Development Company. June 11, 1984, Pp. 48-55, 71.

  • Deposit

    Hobbs, S. W., And Others, 1965 , Geology Of The Coeur D'Alene District, Shoshone County, Idaho: USGS Prof. Paper 478 , 139 P.

  • Deposit

    Leep, Geologic Features Of The Star-Morning And Lucky Friday Mines In Idaho'S Coeur D'Alene District. Pres. At Aime 16th Annual Int. Miner. Con., Vail, Co, July 18, 1980, 10 Pp.

  • Deposit

    Marks, Cut-And-Fill And Square-Set Stoping Costs For Smaller Orebodies. Ch. 8 In Mineral Industry Costs. Nwma 1982, Pp. 115-121.

  • Deposit

    Mckinstry, Deepest Single Lift Shaft In North America Nears Completion. Min. Eng., Oct. 1983, Pp. 1391-1396.

  • Deposit

    Mining Engineering. Hecla'S Silver-Lead Mines Provide A Study In Contrasts, July 1976, Pp. 59-60, 356-5, 356-6.

  • Deposit

    Ransome And Calkins. The Geology And Ore Deposits Of The Coeur D'Alene District, Idaho. USGS P.P. 62, 1908, 203 Pp

  • Deposit

    Shenon And Mcconnel. The Silver Belt Of The Coeur D'Alene District, Idaho: Id Bumines And Geol. Pamphlet No. 50, 1939, 9 Pp.

  • Deposit

    Staff, Lucky Friday Mine. Cut-And-Fill Stoping At Lucky Friday Mine. Ch. 6 In U.G. Mining Methods Hdbk. Sme-Aime 1982, Pp. 554-557.

  • Deposit

    Steckly And Lemons. A Method For Updating Cost Estimates For The Minerals Availability System. Unpubl. Bumines Rep., Ifoc, May 1976.

  • Deposit

    Straam Engineers, Inc. Capital And Operating Cost Estimating System Handbook. Bumines Contract No. Jo255026, 1979.

  • Deposit

    Umpleby And Jones, Jr. Geology And Ore Dposits Of Shoshone County, Idaho. USGS Bulletin 732, 1923, 156 Pp.

  • Deposit

    Wahler, W. A., And Associates. Summary Of Hydraulic Backfill Operations In Selected Underground Mines, Coeur D'Alene District, Idaho. Bumines Contract No. Ho242026, May 1976.

  • Deposit

    The Mining Record, Sept., 4, 1996, P11.

  • Deposit

    The Mining Record, Dec., 4, 1996, P8, V107, #49, P19.

  • Deposit

    Mining Journal, 5-16-97, P.394.

General comments

Subject category Comment text
Deposit 5-16-97: Hecla Approved Plans To Double Ag Output. The Expansion Wll Be Fuelled By The Development Of The Gold Hunter Vein (1500 M NW Of The Lucky Friday Vein). The Gold Hunter Vein Is Nearly Twice The Grade And Width Of The Lucky Friday Vein And Will Allow The Company To Increase Ag Production To Over 4 Moz By 1998. In 1996, The Operation Produced 1.9 Moz. The New Vein Will Be Mined Using Overhand Cut-And-Fill. In Addition, Hecla Plans To Upgrade Its Backfill Plant And Expand Its Concentrate Storage Facilities. Total Proven And Probable Ag Reserves At The Lucky Friday Mine Are 18.5 Moz. Property Includes The Golden Hunter Mine (Past Producer) Mas Seq# 0160790063.

Reporter information

Type Date Name Affiliation Comment
Reporter 18-JUL-97 Clarke, Donald U.S. Bureau of Mines