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Arnold 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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Production statistics
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10082839
MRDS ID W062197
Record type Site
Current site name Arnold Copper Mine

Geographic coordinates

Geographic coordinates: -88.19393, 47.43 (WGS84)
Elevation 329
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Keweenaw(county)

Michigan(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Eagle Harbor(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 058N 031W 15 SW OF SW Michigan
SE OF SW Michigan
NE OF SW Michigan
NW OF SW Michigan

Comments on the location information

  • LOCATED ALONG JACOBS CREEK AND ALONG A NNW-TRENDING MINERALIZED FISSURE. A NORTH-TRENDING FAULT LIES ABOUT 0.1 MI TO THE EAST OF SHAFT NO. 1. LAT/LON IS FOR THE MAIN ENTRANCE

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Copper Ore

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 Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Ashbed Amygdaloid
    Rock description Ashbed Amygdaloid
    Stratigraphic age (youngest) Stenian
    Chronological age 1095
  • 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) -88.19393, 47.43
ListMap

Economic information

Controls for ore emplacement

  • Fissure

Comments on the geologic information

  • THE ASHBED AMYGDALOID (IN THE UPPER PART OF THE PORTAGE LAKE VOLCANICS) RANGES FROM 5 TO 15 FEET THICK. COPPER OCCURS IN FINELY DISSEMINATED GRAINS AND IS DISSEMINATED THROUGH THE AMYGDALOID OVER WIDE AREAS.

Economic information about the deposit and operations

Development status Past Producer
Deposit size Small
Significant No
Year of first production 1860
Year of last production 1900
Production years ARNOLD MINE PROPER OPENED IN 1863 AND OPERATED FROM 1863 TO ABOUT 1869; CLOSED 1869-1892; ACTIVE 1892-1894; IDLE 1894 TO FEB 1897 WHEN WORK RESUMED.

Mining district

District name Keweenaw Copper

Production statistics

  • Year 1898
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 69.1mt
  • Year 1899
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 346.5mt
  • Year 1900
    Period 1898-1900
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 803.9mt
  • Year 1900
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 388.3mt

Comments on the workings information

  • CONSIDERABLE DEVELOPMENT AND STOPING WAS DONE ALONG THE AMYGDALOIDAL FLOW TOP

Comments on development

  • ECON.COM: ARNOLD OPERATED IN A SMALL WAY IN 1860. COPPER FALLS WAS ABSORBED IN 1898. IN APRIL, 1864, 100,000 SHARES WERE AUTHORIZED AT $25 PER SHARE.

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., AND WRIGHT, J.C., 1954, BEDROCK GEOLOGY OF THE EAGLE HARBOR QUADRANGLE, MICHIGAN: U.S. GEOLOGICAL SURVEY, GEOLOGIC QUADRANGLE MAPS OF THE UNITED STATES, GQ 36, 1:24,000.

  • Production

    BUTLER AND BURBANK, 1929

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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