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Petherick 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. Ownership information
  16. Production statistics
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10106399
MRDS ID W062196
Record type Site
Current site name Petherick Mine
Alternate or previous names Ashbed

Comments on the site names

  • THE GEOLOGIC MAP (CORNWALL AND WRIGHT, 1954) CALLS THIS DEPOSIT PETHERICK, BUTLER AND BURBANK (1929, P. 78) USES THE NAME ASHBED.

Geographic coordinates

Geographic coordinates: -88.19976, 47.42417 (WGS84)
Elevation 378
Location accuracy 100(meters)
Relative position PETHERICK FISSURE IS ABOUT 2,000 FT WEST OF OWL CREEK FISSURE

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 14 NE OF NE Michigan
NW OF NE Michigan
SE OF NE Michigan
SW OF NE Michigan
SE OF SE Michigan
SW OF SE Michigan
NE OF SE Michigan
NW OF SE Michigan

Comments on the location information

  • LAT/LON IS FOR THE CENTER OF NINE PROSPECTS

Commodities

Commodity Importance
Copper Primary

Comments on the commodity information

  • THE GANGUE MINERALS ARE SECONDARY MINERALS THAT FILLED VESICLES AND OTHER OPENINGS. FROM OBSERVATIONS ON THE DUMP, DATOLITE WAS ABUNDANT IN THE FISSURE AND IN THE ASHBED ADJACENT TO THE FISSURE.

Materials information

Materials Type of material
Copper Ore
Calcite Gangue
Quartz Gangue
Datolite Gangue
Epidote Gangue
Pumpellyite-(Mg) 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) > Intermediate Volcanic Rock > Andesite
    Rock unit name Portage Lake Volcanics
    Rock description Portage Lake Volcanics
    Stratigraphic age (youngest) Stenian
    Chronological age 1095
  • Host or associated Host
    Rock type
    Rock unit name Ashbed Amygdaloid
    Rock description Ashbed Amygdaloid
    Stratigraphic age (youngest) Stenian
    Chronological age 1095

Nearby scientific data

(1) -88.19976, 47.42417
ListMap

Economic information

Ore body information

  • General form FISSURE

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 1861
Year of last production 1884
Production years 1861-70, 1872-77, 1881, 1882, 1884

Mining district

District name Keweenaw Copper

Ownership information

  • Type Owner
    Owner Petherick Mining Co. (organized in April, 1861, by Copper Falls Mining Co).
    First year 1861

Production statistics

  • Year 1854
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 23.2mt
  • Year 1862
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 14.4mt
  • Year 1863
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 60.4mt
  • Year 1865
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 4.16mt
  • Year 1868
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 5.44mt
  • Year 1872
    Accuracy Accurate
  • Year 1873
    Accuracy Accurate
  • Year 1874
    Accuracy Accurate
  • Year 1875
    Accuracy Accurate
  • Year 1876
    Accuracy Accurate
  • Year 1877
    Accuracy Accurate
  • Year 1881
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 32.95mt
  • Year 1882
    Accuracy Accurate
  • Year 1884
    Period 1862-1884
    Accuracy Accurate

Comments on the production information

  • 1350 mt rock mined, no reported copper production.

Comments on the workings information

  • PETHERICK FISSURE HAS BEEN OPENED CONTINUOUSLY BY ADIT AND SHAFT FOR ABOUT 2,300 FT ALONG STRIKE AND TO A MAXIMUM DEPTH FROM THE OUTCROP AT NO. 6 SHAFT TO THE ADIT LEVEL OF ABOUT 225 FT. THERE WAS SOME WORKING ON THE ASHBED AMYGDALOID ADJACENT TO THE FISSURE.

Comments on development

  • BETWEEN 1898 AND 1900 EXPLORATORY WORK CARRIED ON; THE MINE WAS IDLED IN 1900. WORK RESUMED IN 1905. ; ECON.COM: IN 1880 ASHBED MINING CO. WAS ORGANIZED WITH 40,000 SHARE SOLD AT $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

    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, P. 78.

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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