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Ojibway 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. Reporter information

Geologic information

Identification information

Deposit ID 10082847
MRDS ID W062205
Record type Site
Current site name Ojibway Mine

Geographic coordinates

Geographic coordinates: -88.26615, 47.33778 (WGS84)
Elevation 332
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

Mohawk(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 057N 032W 13 SW OF NW Michigan

Comments on the location information

  • LAT/LON IS FOR THE ORE BODY

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Copper Ore
Calcite Gangue
Quartz Gangue
Prehnite Gangue
Epidote 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 Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
    Rock unit name Kearsarge Amygdaloid
    Rock description Kearsarge 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) -88.26615, 47.33778
ListMap

Economic information

Ore body information

  • General form FISSURE

Controls for ore emplacement

  • Lode

Comments on the geologic information

  • THE TOP OF THE KEARSARGE AMYGDALOID WAS MINED FOR NATIVE COPPER.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Deposit size Small
Significant No
Discovery year 1907
Year of first production 1911
Year of last production 1944

Mining district

District name Keweenaw Copper

Production statistics

  • Year 1911
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 22.5mt

Comments on the production information

  • MASS COPPER RETAINED AT THE MINE AMOUNTED TO 0.7 LBS/ TON STAMPED, BRINGING TOTAL PRODUCT UP TO 7.35 LBS/TON, WITH TAILING LOSSES OF ABOUT 3 LBS.

Comments on the workings information

  • SHAFTS 1 AND 2 ARE LINKED UNDERGROUND BY EXTENSIVE DEVELOPMENT AND STOPING. THE AMYGDALOID TOP OF THE KEARSARGE FLOW HAS BEEN MINED TO VERTICAL DEPTHS OF 3,000 TO 4,000 FEET FOR 2 MILES ALONG STRIKE IN THE MOHAWK QUADRANGLE.

Comments on development

  • ECON.COM: ORGANIZED JUN 1907, 100,000 SHARES OF $25 EACH.

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

    DAVIDSON, E.S., ESPENSHADE, G.H., WHITE, W.S., AND WRIGHT, J.C., 1954, BEDROCK GEOLOGY OF THE MOHAWK QUADRANGLE, MICHIGAN: U.S. GEOLOGICAL SURVEY, GEOLOGIC QUADRANGLE MAPS OF THE UNITED STATES, GQ 54, 1:24,000.

  • Production

    BUTLER AND BURBANK, 1929, P. 91

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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