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Gray Eagle

Past Producer in Siskiyou county in California, United States with commodities Cobalt, Copper, Gold, Lead, Silver, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Mineral occurrence model information
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Mineral rights holdings
  14. Land status
  15. Ownership information
  16. Production statistics
  17. Reserves and resources
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10164768
MRDS ID W017559
MAS/MILS ID 0060930191
Record type Site
Current site name Gray Eagle
Alternate or previous names Grey Eagle, Trident., Rugged Sage., Plummer., Dahia, Dakin.
Related records 10110460

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -123.37284, 41.86263 (WGS84)
Elevation 731
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Siskiyou(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Slater Butte(quadrangle 1:24,000 scale)

Happy Camp(quadrangle 1:100,000 scale)

Weed(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Klamath(hydrologic unit)

Klamath(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Federal lands

Klamath National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Siskiyou

Public Land Survey System information

Meridian Township Range Section Fraction State
Humboldt 017 N 007 E 14 NENESW California

Commodities

Commodity Importance
Cobalt Critical Secondary
Copper Primary
Gold Primary
Lead Secondary
Silver Primary
Zinc Critical Primary

Materials information

Materials Type of material
Azurite Ore
Chalcocite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Malachite Ore
Silver Ore
Sphalerite Ore
Tin Ore
Chlorite Gangue
Quartz Gangue

Mineral occurrence model information

Model code 184
USGS model code 28a
Deposit model name Massive sulfide, kuroko
Mark3 model number 93

Nearby scientific data

Main Entrance (1) -123.37284, 41.86263
ListMap

Economic information

Ore body information

  • Dip 25N
    Thickness 13.2M
    Length 244M
    Width 123M
    Area 119.5HA
    Depth to top 117M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 LENTICULAR
    Type of Orebody #2 SHEAR ZONE
    Type of Orebody #3 FISSURE VEIN
    Primary mode of Origin CONT METASOMATIC
    Secondary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control FRACTURING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 PYRITIZATION
    Type of Wallrock Alter. #2 SILICIFICATION
    Type of Wallrock Alter. #3 SERICITIC
    Strike And Dip :25N
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 820614

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1892
Mining method Open Pit
Year of first production 1898
Plant type Leach
Milling method Carbon-In-Pulp-Electrowin

Mining district

District name Klamath River District

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Located Claim

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Siskon Gold Corp.
    ID 404492
    Interest 100
    Home office Nevada
    Year 1978
  • Type Operator
    Owner Noranda-Grey Eagle Min. Co. Happy Camp, Ca
    ID 404492
    Home office California
    Year 1984

Production statistics

  • Year 1898
    Description 8221.3gg Au.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Au Gold Gold 8221g
  • Year 1900
    Description 4110.68g Au.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 4111g
  • Year 1902
    Description 2069.52g Au. 81 Tonnes Ore.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 81mt
  • Year 1903
    Description 1502.51g Au. 68 Tonnes Ore.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 68mt
  • Year 1943
    Description 70476.91g Au; 264557g Ag; 4738437 Kg Cu. 131000 Tonnes Ore.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 4738.43mt
    Major Gold Gold 70476g
    Major Silver Silver 264557g
  • Year 1944
    Description 90378g Au; 404377g Ag; 7390452 Kg Cu. 205000 Tonnes Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 7390.45mt
    Major Gold Gold 90378g
    Major Silver Silver 404377g
  • Year 1945
    Description 13210g Au; 63474g Ag; 1427003 Kg Cu. 38000 Tonnes Ore.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1427mt
    Major Gold Gold 13210g
    Major Silver Silver 63474g

Comments on the production information

  • HP-REC 005 AU, AG, CU RECOVERED FM 131000 MT CRUDE ORE. HP-REC 006 AU, AS, CU RECOVERED FM 205000 MT CRUDE ORE. HP-REC 007 AU, AG, CU RECOVERED FM 38000 MT CRUDE ORE. EXPLORATION SUBSEQUENT TO 1979 HAS RESULTED IN DELINEATION OF ADDITIONAL GOLD RESERVES. TONNAGE AND GRADE OF ADDITIONAL RESERVES UNAVAILABLE.
  • 1077 G AU RECOVERED IN 1892 IN PLACER OP. P. SHIFTED FM PLACER TO LODE 1898. NO REPORTED PROD. 1904-1943. DRILL CORE INFO. AVAILABLE IN FILE REPORT. NORANDA DOES NOT PLAN TO MINE THE SULFIDE ORE IN THE NEAR FUTURE.

Reserves and resources

  • Type In-situ
    Estimate year 1992
    Demonstrated 1015139mt ore
    Total resources 1015139mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 2.55 wt-pct Copper Major 1992
    Gold Au 0.6857 g/mt Gold Major 1992

Comments on the reserve resource information

  • IN ORDER TO RECOVER ALL THE ORE., THE STRIPPING RATIO WOULD GO AS HIGH AS 12:1. 90 PCT PROB. BASED ON ORAL COMMUNICATION W/ NORANDA CO.GEOL. 75 AND 50 PCT PROB.BASED ON FAVORABLE GEOLOGICAL COND.. 90 PCT PROB.BASED ON ORAL COMM. W/ NORANDA CO. GEOL. JUN1978 75 AND 50 PCT PROB BASED ON FAVORABLE GEOLOGICAL COND.

Workings at the site

  • Type of workings Surface
    Area 10HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Percent Waste Rock 76.7
    Avg. Overburden Thickness 50
    Primary Material Cover SAND, GRAVEL
    Secondary Material Cover M-HARD ROCKS
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 0
    Max. Pit Slope (degrees) 45
    Capacity 600
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 50000
    Unit Production Cost 12.07
    Units of Production $/MT ORE
    Operating Days per Year 305
    Operating Shifts per Day 2
    Year of Information 1979
  • Type of workings Surface
    Area 30HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Percent Waste Rock 88.8
    Avg. Overburden Thickness 100
    Primary Material Cover SAND, GRAVEL
    Secondary Material Cover M-HARD ROCKS
    Hardness of Ore M-HARD ROCKS
    Max. Pit Slope (degrees) 45
    Capacity 2000
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 7.09
    Units of Production $/MT ORE
    Operating Days per Year 305
    Operating Shifts per Day 2
    Year of Information 1979

Comments on other economic factors

  • A 500 S.T./D CARBON-IN-PULP PLANT CONSTRUCTED BETWEEN 1979 & 1982, AS WELL AS ELECTROWINNNG FACILITY.
  • SURFACE MINE CURRENTLY IN PRODUCTION. NO DATA RELATIVE TO TO PIT ARE PRESENTY AVAILABLE. PRODUCTION IS FROM GOLD (OXIDE) ZONE. MINING RATE GREATER THAN 454 T/D.
  • RECORD 103 LINE 2 THE DISTANCE IS 3.5 X 100. THUS THE ACTUAL COST IS 0.00003/KM/MT.

Reference information

Bibliographic references

  • Deposit

    UNIVERSITY OF CALIFORNIA, BERKELEY. MINING WASTE STUDY,

  • Deposit

    FINAL REPORT, JULY 1988, 416 PP. (P. 251-254).

  • Reserve-Resource

    RANDOL MINING DIRECTORY, 1996/97, P156

  • Deposit

    CALIF JOUR MN/GEOL V 43 NO 4 OCT 1947 PP 425-427

  • Deposit

    RES. OF SISKIYOU CO.;CA.DIV. MINES REPT.31,P255-388.

  • Deposit

    BROWN,G.C.,1916, SISKIYOU CO.: CA.MIN.BUR.REPT.14, P810-827.

  • Deposit

    LAIZURE,C.,1921, SISKIYOU CO.: CA.MIN.BUR.REPT 17, P531.

  • Deposit

    LOGAN,C.A.,1925, SALTO. FLD. DIV.- SISKIYOU CO.:CA MIN.BUR.

  • Deposit

    REPT. 21, P428.

  • Deposit

    O'BRIEN,J.C.,1943,CURRENT NOTES ON THE ACTIVITY IN THE

  • Deposit

    STRATEGIC MINERALS, REDDING FIELD DIST.: CA.DIV.MINES REPT.

  • Deposit

    39,P324.

  • Deposit

    TUCKER,W.B.,REDDING FLD. DIV.-REVIEW OF MINING,1922.: CA.

  • Deposit

    MIN.BUR.REPT.19,P8.

  • Deposit

    O'BRIEN,J.C.,1947,MINES AND MINERAL RES. OF SISKIYOU CO: CA.

  • Deposit

    DIV. MINES REPT VOL 43, P425-427.

  • Deposit

    AUBURY,LEWIS,1908, CU RES. OF CA.: CA.ST MINING BUR.BULL. 50

  • Deposit

    P.132.

  • Deposit

    SIMMONS, G. L., D. L. BLAKEMAN, J. W. TRIMBLE, AND S. W.

  • Deposit

    BANNING. NORANDA'S CARBON IN PULP GOLD/SILVER OPERATIO AT

  • Deposit

    HAPPY CAMP, CA. MIN. AND MET. PROC., V. 2, NO. 2, 1985,

  • Deposit

    PP. 73-79.

General comments

Subject category Comment text
Environmental Factors THE NORANDA GREY EAGLE MINE IS A RECENT GOLD AND SILVER MINE (1981) IN THE SAME GENERAL LOCATION AS THE OLDER GREY EAGLE MINE WHICH PRODUCED COPPER. THE WASTE MANAGEMENT FACILITIES AT THE NEW MINE WERE BUILT IN COMPLIANCE WITH EXISTING CODES. NEVERTHELESS, CYANIDE-CONTAMINATED EFFLUENT LEAKED FROM THE TAILINGS DAM, AND THE ANTICIPATED ATTENUATION OF FREE CYANIDE BY METALS IN THE FILL MATERIAL OF THE DAM DID NOT OCCUR. NORANDA INSTALLED A COLLECTION SYSTEM AND AN ADDITIONAL TREATMENT PLANT TO TREAT SEEPAGE FROM THE TAILINGS DAM. THE MINE IS NOW CLOSED, BUT THE TREATMENT PLANT WILL BE OPERATED UNTIL CYANIDE IS BELOW DETECTION LEVELS IN THE SEEPAGE, ESTIMATED AT ABOUT 20 YEARS. THE COST OF THESE MITIGATION EFFORTS HAS RESULTED IN NORANDA SUFFERING A SUBSTANTIAL LOSS ON THIS PROJECT.

Reporter information

Type Date Name Affiliation Comment
Reporter 17-JUN-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.

Current status (per MSHA)

StatusAbandoned since 07/25/1986
MSHA mine ID0404492
Mine name (MSHA)Grey Eagle Mine
Current operatorNoranda Grey Eagle Mines Inc
Current controller (parent)Noranda Inc
Mine typeSurface (Metal / non-metal)

MSHA cross-reference per the original MRDS record. Mine status and operator reflect MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date. See the Mine Data Retrieval System for current status.

Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.

External references

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.