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

Geologic information

Identification information

Deposit ID 10082861
MRDS ID W062222
Record type Site
Current site name Allouez Mine

Comments on the site names

  • ALLOUEZ MINE WORKED THE ALLOUEZ CONGLOMERATE LODE (RECORD W06044).

Geographic coordinates

Geographic coordinates: -88.41172, 47.28917 (WGS84)

Site location context

Political divisions (FIPS codes)

Keweenaw(county)

Michigan(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ahmeek(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 31 Michigan

Comments on the location information

  • A3 DRILL HOLE.

Commodities

Commodity Importance
Copper Primary

Comments on the commodity information

  • IN THE CONGLOMERATES, THE COPPER OCCURS CHIEFLY IN THE FINER CEMENTING MATERIAL OF THE MEDIUM- TO COARSE-GRAINED CONGLOMERATE. IN SOME CASES, COPPER FILLED PORE SPACES, BUT MAINLY IT REPLACED THE CEMENT.

Materials information

Materials Type of material
Copper Ore
Epidote Gangue

Alteration

  • (Local) Alteration associated with the copper mineralization is a pronounced bleaching of the conglomerate from a brownish red to a light pink or salmon color. the color change resulted from the removal of a part, often a large part, of the hematite of the conglomerate with no very pronounced change in the other minerals.

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 Sedimentary Rock > Clastic Sedimentary Rock > Conglomerate
    Rock unit name Allouez Conglomerate
    Rock description Allouez Conglomerate
    Stratigraphic age (youngest) Stenian
    Chronological age 1095
  • 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

Nearby scientific data

(1) -88.41172, 47.28917
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Felsic conglomerate

Ore body information

  • General form TABULAR

Controls for ore emplacement

  • Conglomerate bed between amygdaloid basalt flows.

Comments on the geologic information

  • THE ALLOUEZ CONGLOMERATE IS VERY SIMILAR TO THE FELSITIC PORTION OF THE CALUMET AND HECLA CONGLOMERATE, THOUGH MUCH MORE PERSISTENT AND OVER CONSIDERABLE AREAS MUCH THICKER. IT IS LENTICULAR, HOWEVER, IN PLACES PINCHING OUT COMPLETELY OR REPRESENTED ONLY BY A THIN CLAY SEAM.THE ALLOUEZ CONGLOMERATE IS VERY SIMILAR TO THE FELSITIC PORTION OF THE CALUMET AND HECLA CONGLOMERATE, THOUGH MUCH MORE PERSISTENT AND OVER CONSIDERABLE AREAS MUCH THICKER. IT IS LENTICULAR, HOWEVER, IN PLACES PINCHING OUT COMPLETELY OR REPRESENTED ONLY BY A THIN CLAY SEAM. AFTER PRODUCTION FROM THE ALLOUEZ CONGLOMERATE ENDED IN 1892, THE MINE BEGAN EXTRACTING COPPER FROM THE KEARSARGE AMYGDALOIDAL LODE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant No
Year of first production 1869
Year of last production 1923
Production years 1869, 1873-1893 (ALLOUEZ CONGLOMERATE); 1905-1920 (KEARSARGE AMYGDALOID).

Mining district

District name Keweenaw Copper

Production statistics

  • Year 1893
    Period 1869-1893
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 11698mt
  • Year 1920
    Period 1905-1920
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 37295mt

Comments on the production information

  • THE ALLOUEZ CONGLOMERATE WAS MINED FROM THE ALLOUEZ, FRANKLIN JUNIOR, AND DELAWARE MINES. PRODUCTION FROM 1869-1893 FROM ALLOUEZ CONGLOMERATE; PRODUCTION FROM 1905-1920 FROM KEARSARGE AMYGDALOID.

Comments on development

  • ECON.COM: THE PROPERTY WAS ABSORBED BY CALUMET AND HECLA 1 SEP 1923.

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

    WHITE, W.S., CORNWALL, H.R., AND SWANSON, R.W., 1953, BEDROCK GEOLOGY OF THE AHMEEK QUADRANGLE; USGS MAP GQ-27, SCALE 1:24000

  • Production

    BUTLER AND BURBANK , 1929, P. 77.

General comments

Subject category Comment text
Deposit DEPOSIT IS A CONGLOMERATE LODE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1996 Sutphin, D.M. (Cannon, W.F.) U.S. Geological Survey
Updater 01-MAR-1997 Sutphin, D.M. U.S. Geological Survey
Editor 01-MAY-1997 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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