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  3. Mineral Resource Data System (MRDS)

Lac La Belle

Prospect 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. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Reserves and resources
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10082637
MRDS ID W060075
Record type Site
Current site name Lac La Belle
Alternate or previous names Mt. Bohemia Fissure

Geographic coordinates

Geographic coordinates: -88.01559, 47.4 (WGS84)
Relative position GRANT TOWNSHIP

Site location context

Political divisions (FIPS codes)

Keweenaw(county)

Michigan(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Delaware(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 029W 29 NW NW Michigan

Comments on the location information

  • ASSUMED LOCATION WAS THE SAME AS THAT FOR THE MENDOTA FISSURE (JUST NORTH OF MT. BOHEMIA). LAT/LON IS FOR THE SOUTHERN SHAFT ON MENDOTA FISSURE.

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcocite Ore

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
  • 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

Nearby scientific data

(1) -88.01559, 47.4
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Mineralization in lowermost Portage Lake volcanics

Ore body information

  • General form IRREGULAR

Comments on the geologic information

  • MINERALIZATION OCCURS IN TOP OF TWO FRAGMENTAL AMYGDALOIDAL FLOWS AND IN AN ASSOCIATED CROSS-CUTTING ANDESITE DIKE

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1846
Year of last production 1866

Mining district

District name Keweenaw Copper

Ownership information

  • Type Owner
    Owner Major Alexander Sibley
  • Type Operator
    Owner Michigan Copper ComMichigan Copper Company,Ltd

Reserves and resources

  • Type In-situ
    Estimate year 1995
    Reserves 6
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 2.72 wt-pct Copper Major 1995

Comments on the workings information

  • UNDERGROUND MINE FOLLOWED 2 VEINS UP SOUTH SIDE OF BLUFF; EARLY FISSURE METHOD OF SHAFTS AND ADITS DRIVEN FOR DRAINAGE, AT LEAST 4 ADITS WITH 4 SHAFTS WITH THEM AND 3 OTHER SHAFT EXPLORATIONS AT SITE MAP.

Comments on development

  • MAJOR ALEXANDER SIBLEY IN 1846 STARTED LAC LA BELLE MINE IN SEC 32, ASSUMED TO BE THE LOWER OR SOUTHERN WORKING ON MT. BOHEMIA, SIMON MANDLEBAUM HAD BOHEMIA MINE SEC 29 IN 1846 THAT WAS "FARTHER UP THE HILL" & BURNED IN 1848.

Reference information

Bibliographic references

  • Deposit

    MICHIGAN COPPER COMPANY LTD, 19---, MICHIGAN COPPER SULFIDE PROJECT: KEWEENAW PENINSULA: COMPANY REPORT, 21 PP.

  • Deposit

    JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, KEWEENAW COUNTY, SITE ID 420048, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.

  • Reserve-Resource

    MICHIGAN COPPER COMPANY LTD REPORT

General comments

Subject category Comment text
Deposit VEIN WITHIN MT. BOHEMIA INTRUSIVE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1995 Nicholson, Suzanne 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
Editor 30-JUL-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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