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  3. Mineral Resource Data System (MRDS)

Eureka Mine

Past Producer in Ontonagon 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. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  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 10310121
MRDS ID LW00121
Record type Site
Current site name Eureka Mine
Alternate or previous names Merryweather, Conklin

Geographic coordinates

Geographic coordinates: -89.40508, 46.67333 (WGS84)
Relative position MATCHWOOD TOWNSHIP; NORTH OF HUDSON, WEST OF HAMILTON, NORTH AND WEST OF NORWICH

Site location context

Political divisions (FIPS codes)

Ontonagon(county)

Michigan(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Matchwood NW(quadrangle 1:24,000 scale)

Ontonagon(quadrangle 1:100,000 scale)

Iron River(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Ontonagon(hydrologic unit)

Southcentral Lake Superior(hydrologic accounting unit)

Southern Lake Superior(hydrologic subregion)

Great Lakes(hydrologic region)

Federal lands

Ottawa National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Michigan Ontonagon

Public Land Survey System information

Meridian Township Range Section Fraction State
Michigan 49N 41W 2 W 1/2 Michigan

Commodities

Commodity Importance
Copper Primary

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 Portage Lake Volcanics
    Rock description Portage Lake Volcanics
    Stratigraphic age (youngest) Stenian
    Chronological age 1095

Nearby scientific data

(1) -89.40508, 46.67333
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Syncline

Ore body information

  • General form IRREGULAR

Comments on the geologic information

  • ALTERNATE BRECCIATED BASALT FLOWS, AMYGDALOIDAL BASALTS AND/OR INTERFLOW CONGLOMERATES - VARIES WITH LOCATION

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No
Year of first production 1863

Mining district

District name Keweenaw Copper District

Production statistics

  • Year 1863
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 3.6mt

Comments on the workings information

  • 1 SHAFT LISTED

Comments on development

  • EUREKA WAS ORIGINALLY CONKLIN PREEMPTION (1 SHAFT) TAKEN OVER BY MERRYWEATHER MINING CO (1859), TO O'ROURKE (1861) THEN EUREKA MINING CO.,(1863),

Reference information

Bibliographic references

  • Deposit

    JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, ONTONAGON COUNTY, P. 71-72, SITE ID # 660031, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.

  • Production

    UNDERGROUND MINE INVENTORY

Reporter information

Type Date Name Affiliation Comment
Reporter 06-AUG-2002 Anderson, Arlene (M. Gere) Michigan Department of Natural Resources

Beyond USGS

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

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