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Seneca

Past Producer in Keweenaw county in Michigan, United States with commodity Copper
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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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Production statistics
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10292488
MRDS ID W062204
MAS/MILS ID 0260830021
Record type Site
Current site name Seneca
Alternate or previous names Seneca No. 2, Kearsarge Lode
Related records 10082846

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -88.34864, 47.3811 (WGS84)
Elevation 310
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Keweenaw(county)

Michigan(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Phoenix(quadrangle 1:24,000 scale)

Hancock(quadrangle 1:100,000 scale)

Hancock C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Keweenaw Peninsula(hydrologic unit)

Southcentral Lake Superior(hydrologic accounting unit)

Southern Lake Superior(hydrologic subregion)

Great Lakes(hydrologic region)

Geographic areas

Country State County
United States Michigan Keweenaw

Public Land Survey System information

Meridian Township Range Section Fraction State
Michigan 057 N 032 W 27 NWNENE Michigan

Comments on the location information

  • POINT OF REFERENCE FOR LOCATION IS THE SENECA NO. 2 SHAFT.

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Barite Unknown
Calcite Unknown
Chlorite Unknown
Copper Unknown
Epidote Unknown
Hematite Unknown
Laumontite Unknown
Plagioclase Unknown
Prehnite Unknown
Pyroxene Unknown
Quartz Unknown
Saponite Unknown
Silver Unknown

Nearby scientific data

Main Entrance (1) Copper Harbor Conglomerate
ListMap

Economic information

Ore body information

  • Strike N40E
    Dip 40N
    Thickness 3M
    Length 17600M
    Width 3700M
    Area 10HA
    Depth to top 1200M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 REPLACEMENT
    Type of Orebody #3 FISSURE VEIN
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control LITHOLOGY
    Secondary Ore Control FRACTURING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 BLEACHING
    Type of Wallrock Alter. #2 PROPYLITIC
    Strike And Dip N40E:40N
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 3
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 10
    Date of Last Modification 790111

Comments on the geologic information

  • MINERAL WEIGHT PERCENTAGES FROM WILBAND, REF. M001-2. OTHER MINERALS ARE MENTIONED IN REF. G007-10.
  • THE BEST GEOLOGICAL DESCRIPTION OF THE KEARSARGE LODE IS REF. G007-10.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1874
Year of first production 1887

Mining district

District name Michigan Native Copper Belt

Mineral rights holdings

Type of mineral rights Fee Ownership
Type of mineral rights Minerals Only
Type of mineral rights Private Lease

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Universal Oil Products
    Interest 100
    Home office Illinois
    Year 1978

Comments on the ownership information

  • THE PROPERTY IS LEASED TO HOMESTAKE COPPER COMPANY AND INCO, LTD., ON A 60-40 PERCENTAGE PARTNERSHIP BASIS.

Production statistics

  • Year 1964
    Description Recoverable Ore Grade Of O.680% Copper 110400 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 110400mt 1wt-pct
  • Year 1965
    Description Recoverable Ore Grade Of O.628% Copper 246299 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 246299mt 1wt-pct
  • Year 1966
    Description Recoverable Ore Grade Of O.653% Copper 364500 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 364500mt 1wt-pct

Comments on the production information

  • YEAR OF DISCOVERY FROM REFERENCE H011-13, YEAR OF INITIAL PRODUCTION FROM REF. G001-3, YEAR OF LAST PRODUCTION FROM REF. H008-10. AN EXPLORATION DRIFT ON THE SOUTH END OF THE KEARSARGE LODE RESULTED IN THE DISCOVERY OF A BLIND ORE SHOOT (REF. H011-13). PRODUCTION DATA FROM REF. H014-17. THIS PRODUCTION IS FROM THE SENECA MINE ONLY. OTHER MINES ON THE KEARSARGE LODE, THE PENINSULA AND CENTENNIAL MINES, PRODUCED THROUGH 1965 AND 1967, RESPECTIVELY.

Workings at the site

  • Type of workings Underground
    Length 2850M
    Overall depth 1067M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method HORIZ CUT & FILL W/WASTE ROCK 10-60
    Swell Factor .55
    Percent Waste Rock 0
    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 1
    Capacity 1000
    Capacity Units MT ORE/DAY
    Unit Production Cost 26.11
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1978

Comments on the workings information

  • ENVIRONMENTAL SENSITIVITY OF LAND AND WATER TO MINERAL EXTRACTION IS RATED MODERATE IN BOTH LONG AND SHORT TERM BECAUSE OF SIZE OF TAILINGS DISPOSAL AREA AND BECAUSE OF THE HIGH SALINITY OF MINE WATERS.

Reference information

Bibliographic references

  • Geology

    BUTLER, B.S. AND W.S. BURBANK. THE COPPER DEPOSITS OF MICH-

  • Geology

    IGAN. U.S. GEOLOGICAL SURVEY PROF. PAPER NO. 144, 1929, 238

  • Geology

    PP. PLUS SEPARATE PLATES.

  • Geology

    HUBBARD, H.A. LOWER KEWEENAWAN VOLCANIC ROCKS OF MICHIGAN

  • Geology

    AND WISCONSIN. U.S. GEOLOGICAL SURVEY J. RES., V. 3, NO. 5,

  • Geology

    SEPT.-OCT.,1975, PP. 529-541.

  • Geology

    CORNWALL, H.R., ET AL. DETAILED GEOLOGIC MAPS OF RECENTLY

  • Geology

    ACTIVE COPPER MINES, HOUGHTON AND KEWEENAW COUNTIES,

  • Geology

    MICHIGAN. U.S. GEOLOGICAL SURVEY OPEN FILE REPT., 1947, 43

  • Geology

    PP., 24 PLATES.

  • Geology

    WHITE, W.S., ED. GUIDEBOOK FOR FIELD CONFERENCE, MICHIGAN

  • Geology

    COPPER DISTRICT. MICHIGAN TECH. UNIV. PRESS, 1971,82PP

  • Deposit

    WEEGE, R.J., AND J.P. POLLOCK. EXPLORATION METHODS IN THE

  • Deposit

    COPPER COUNTRY, KEWEENAW PENINSULA, MICHIGAN. CHAPTER

  • Deposit

    IN PAPERS PRESENTED AT THE AIME PACIFIC SOUTHWEST MIN-

  • Deposit

    ERAL INDUSTRY CONFERENCE, SPARKS NEVADA, MAY 5-7, 1965

  • Deposit

    SESSION ON NORTH AMERICAN EXPLORATION AND MINE DEVELOP-

  • Deposit

    MENT; NEVADA BUREAU OF MINES REPT. 13, PT. C, 1966, PP.

  • Deposit

    51-61.

  • Deposit

    WILBAND, J.T. THE COPPER RESOURCES OF NORTHERN MICHIGAN.

  • Deposit

    BUMINES MINERALS AVAILABILITY SYSTEM CONTRACT NO. J0366

  • Deposit

    067, UNPUBL. FINAL REPT., 1978, 66 PP.; COPY AT E.F.O.C

  • Deposit

    BRODERICK, T.M. AND C.D. HOHL. THE MICHIGAN COPPER DIST-

  • Deposit

    RICT. CHAPTER IN COPPER RESOURCES OF THE WORLD, INTER-

  • Deposit

    NAT. GEOL. CONG., WASHINGTON, D.C., 1935, PP. 271-284.

  • Deposit

    ANONYMOUS. ANNUAL REPORT FOR THE SENECA BRANCH, CALUMET AND

  • Deposit

    HECLA CORP. TO THE STATE GEOLOGIST, GEOLOGICAL SURVEY

  • Deposit

    DIVISION MICHIGAN DEPT. OF CONSERVATION. CALUMET AND

  • Deposit

    HECLA CONFIDENTIAL PRIVATE REPT., 1968, 8 PP.

  • Geology

    WILBAND, J.T. PETROGRAPHIC STUDIES OF KEWENAW ROCKS. UN-

  • Geology

    PUBLISHED, 1970.

  • Reserve-Resource

    WILBAND, J.T. STUDY TO EVALUATE THE COPPER AND SILVER DE-

  • Reserve-Resource

    POSITS IN THE STATE OF MICHIGAN. BUMINES MINERALS

  • Reserve-Resource

    AVAILABILITY SYSTEM CONTRACT NO. J0366067 (MICHIGAN

  • Reserve-Resource

    STATE UNIV.), UNPUBLISHED DEPOSIT FILES, 1978.

  • Reserve-Resource

    HARDENBERG, H.J. KEARSARGE LODE. UNPUBLISHED PRIVATE RE-

  • Reserve-Resource

    PORTS TO MICHIGAN TAX COMMISSION, 1966, 1967, AND 1972.

  • Reserve-Resource

    PARDEE, F.G. KEARSARGE LODE - SENECA MINE. UNPUBLISHED

  • Reserve-Resource

    PRIVATE REPTS., MICHIGAN TAX COMMISSION, 1920, 1929,

  • Reserve-Resource

    1930, AND 1939.

  • Deposit

    BRODERICK, T.M., C.D. HOHL, AND H.N. EIDEMILLER. RECENT

  • Deposit

    CONTRIBUTIONS TO THE GEOLOGY OF THE MICHIGAN COPPER

  • Deposit

    DISTRICT. ECON. GEOL., V. 41, NO. 7, 1946, PP.675-725.

  • Deposit

    WHITE, W.S. THE NATIVE COPPER DEPOSITS OF NORTHERN MICHI-

  • Deposit

    GAN. CHAPTER IN ORE DEPOSITS OF THE UNITED STATES,

  • Deposit

    1933-1967, ED. BY J.D. RIDGE, AIME, V. 1, 1968, PP.

  • Deposit

    303-325.

  • Deposit

    DAVIDSON, E.S., ET AL. BEDROCK GEOLOGY OF THE MOHAWK QUAD-

  • Deposit

    RANGLE, MICHIGAN. USGS MAP GQ-54, 1955.

  • Deposit

    HORE, R.E. MICHIGAN COPPER DEPOSITS. IN MINERAL RESOURCES

  • Deposit

    OF MICHIGAN, PUBLICATION 19, GEOL. SERIES 16, MICHIGAN

  • Deposit

    GEOL. AND BIOLOGICAL SURVEY, 1914.

  • Deposit

    HORE, R.E. THE COPPER INDUSTRY OF MICHIGAN. IN MINERAL RE-

  • Deposit

    SOURCES OF MICHIGAN, PUBL. , GEOL. SERIES 6, MICHIGAN

  • Deposit

    AASE,J. MICHIGAN NATIVE COPPER AVAILABILITY STUDY. RE-

  • Deposit

    SERVES PORTION OF UNPUBLISHED BUMINES REPT., 1971,42PP.

Reporter information

Type Date Name Affiliation Comment
Reporter 21-MAR-1995 Drescher, Theodore 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