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  3. Mineral Resource Data System (MRDS)

Hill Fissure 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. 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. Ownership information
  15. Production statistics
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10310115
MRDS ID LW00115
Record type Site
Current site name Hill Fissure Mine

Geographic coordinates

Geographic coordinates: -88.21448, 47.42417 (WGS84)
Location accuracy 100(meters)
Relative position EAGLE HARBOR, LAT/LONG IS BASED ON CENTER POINT OF MINE,

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 58N 31W 10, 14, 15 SE OF 10 Michigan
NE OF 15 Michigan
W 1/2 OF 14 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) -88.21448, 47.42417
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Syncline

Ore body information

  • Name HILL FISSURE VEIN
    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
Significant No
Year of first production 1852
Year of last production 1860

Mining district

District name Keweenaw Copper District

Ownership information

  • Type Owner
    Owner Copper Falls Mining Co.

Production statistics

  • Year 1860
    Period 1852-1860
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major recovered Cu Copper Copper 227.2mt

Comments on the workings information

  • UNDERGROUND FISSURE MINING METHOD; 10 SHAFTS AND 6 ADITS

Comments on development

  • ALSO RUN BY PETHERICK MINING CO.

Reference information

Bibliographic references

  • Deposit

    JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, KEWEENAW COUNTY, P. 72-75, SITE ID # 420039, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.

  • Production

    UNDERGROUND MINE INVENTORY

General comments

Subject category Comment text
Deposit VEIN RUNS ABOUT 1 MILE LENGTH THROUGH SECTIONS 14, 15 & 10

Reporter information

Type Date Name Affiliation Comment
Reporter 05-AUG-02 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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