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Aetna Exploration Copper Mine

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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Production statistics
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10082838
MRDS ID W062195
Record type Site
Current site name Aetna Exploration Copper Mine

Geographic coordinates

Geographic coordinates: -87.92781, 47.43417 (WGS84)
Elevation 280
Location accuracy 100(meters)
Relative position ABOUT 1 MI SOUTHWEST OF LAKE MANGANESE.

Site location context

Political divisions (FIPS codes)

Keweenaw(county)

Michigan(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lake Medora(quadrangle 1:24,000 scale)

Copper Harbor(quadrangle 1:100,000 scale)

Hancock(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 058N 028W 7 NE OF NW Michigan

Comments on the location information

  • LAT/LON IS FOR THE ORE BODY

Commodities

Commodity Importance
Copper Primary

Comments on the commodity information

  • NATIVE COPPER WAS THE PRINCIPAL ORE MINERAL. COPPER OCCURS IN OR ADJACENT TO THE FISSURES OR FAULTS AS DISSEMINATED GRAINS, AS THIN SHEETS ALONG CRACKS, OR AS MASSES WEIGHING UP TO HALF A TON. AT AETNA, COPPER MASSES WEIGHED UP TO 1,500 LBS.

Materials information

Materials Type of material
Copper Ore
Calcite Gangue
Prehnite Gangue
Quartz Gangue
Datolite Gangue
Laumontite Gangue
Epidote Gangue
Chlorite Gangue

Mineral occurrence model information

Model code 96
USGS model code Unassigned
Deposit model name Native Cu
Mark3 model number 99

Host and associated rocks

  • Host or associated Host
    Rock type
    Rock unit name Portage Lake Volcanics
    Rock description Portage Lake Volcanics
    Stratigraphic age (youngest) Stenian
    Chronological age 1095

Nearby scientific data

(1) -87.92781, 47.43417
ListMap

Economic information

Ore body information

  • General form FISSURE

Controls for ore emplacement

  • Fissure

Comments on the geologic information

  • THE DEPOSIT IS LOCATED ALONG THE CONTACT BETWEEN THE GREENSTONE FLOW AND OTHER ROCKS OF THE PORTAGE LAKE VOLCANICS

Economic information about the deposit and operations

Development status Past Producer
Deposit size Small
Significant No
Year of first production 1864
Year of last production 1867
Production years 1864-67

Mining district

District name Keweenaw Copper

Production statistics

  • Year 1864
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 3.11mt
  • Year 1865
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 1.87mt
  • Year 1866
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 267.5mt
  • Year 1867
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 28.51mt
  • Year 1868
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 1.54mt
  • Year 1873
    Period 1864-1873
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 63.9mt
  • Year 1873
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 2.11mt

Comments on development

  • ECON.COM: 20,000 SHARES BROUGHT IN $500,000. IN 1905 KEWEENAW COPPER CO. TOOK OVER THE EXPLORATION. IT WAS OWNED BY CALUMET AND HECLA IN 1954.

Reference information

Bibliographic references

  • Deposit

    BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PP.

  • Deposit

    CORNWALL, H. R., 1954, BEDROCK GEOLOGY OF THE LAKE MEDORA QUADRANGLE, MICHIGAN: U.S. GEOLOGICAL SURVEY, GEOLOGIC QUADRANGLE MAPS OF THE UNITED STATES, GQ 52, 1:24,000.

  • Production

    BUTLER AND BURBANK, 1929, P. 76.

General comments

Subject category Comment text
Deposit THE MINERALIZED FISSURE PARALLELS A NNE-TRENDING FAULT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-96 Sutphin, D.M. (Cannon, W.F.) U.S. Geological Survey
Updater 01-MAR-97 Sutphin, D.M. U.S. Geological Survey
Editor 01-MAY-97 Mason Jr., G.T. U.S. Geological Survey

Beyond USGS

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

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