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Mineral Lake Cu-Ni Prospect

Occurrence in Ashland county in Wisconsin, United States with commodities Copper, Nickel
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Land status
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10083272
MRDS ID W062860
Record type Site
Current site name Mineral Lake Cu-Ni Prospect
Alternate or previous names Mineral Lake

Geographic coordinates

Geographic coordinates: -90.80791, 46.29917 (WGS84)
Elevation 427
Location accuracy 100(meters)
Relative position LOCATED IN THE CHEQUAMEGON NATIONAL FOREST BETWEEN POTTER LAKE AND THE NORTHERN PART OF MINERAL LAKE. ABOUT 8 MI SW OF THE VILLAGE OF MELLEN, WI., Acc Lat/Lon From 1:24,000 Topo Map.

Site location context

Political divisions (FIPS codes)

Ashland(county)

Wisconsin(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mineral Lake(quadrangle 1:24,000 scale)

Ironwood(quadrangle 1:100,000 scale)

Ashland(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Bad-Montreal(hydrologic unit)

Southwestern Lake Superior(hydrologic accounting unit)

Western Lake Superior(hydrologic subregion)

Great Lakes(hydrologic region)

Federal lands

Chequamegon / Nicolet National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Chequamegon National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Chequamegon-Nicolet 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 Wisconsin Ashland

Public Land Survey System information

Meridian Township Range Section Fraction State
44N}44N 4W}4W 12}13 SE4 (12); NW4 (13) Michigan

Comments on the location information

  • LOCATION IS AMONG THE EXPLORATION DRILL HOLES.

Commodities

Commodity Importance
Copper Primary
Nickel Critical Primary

Comments on the commodity information

  • CHALCOPYRITE AND CUBANITE ARE THE MAIN COPPER MINERALS; PENTLANDITE IS THE DOMINANT NICKEL MINERAL. CHALCOPYRITE OCCURS AS THIN PATCHES AND VEINLETS IN FRACTURES AND CLEAVAGE PLANES MORE OFTEN THAN OTHER SULFIDES. PENTLANDITE IS ALWAYS FOUND AS SUBROUNDED GRAINS IN CONTACT WITH PYRRHOTITE AND RARELY WITH CHALCOPYRITE.

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Cubanite Ore
Marcasite Ore
Niccolite Ore
Pentlandite Ore
Pyrrhotite Ore
Ilmenite Gangue
Magnetite Gangue
Olivine Gangue
Plagioclase Gangue
Pyroxene Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro > Troctolite
    Stratigraphic age (youngest) Mesoproterozoic

Nearby scientific data

(1) -90.80791, 46.29917
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Lake Superior Syncline
Type of structure Local
Structure description Mellen Igneous Intrusive Complex

Controls for ore emplacement

  • No Structural Control Of Mineralization Was Recognized By Bakheit (1981). There Is No Progressive Mineralization With Depth.

Comments on the geologic information

  • MOST ROCKS IN THE DEPOSITS ARE GABBROIC OR TROCTOLITIC WITH A FEW LENSES OR DIKES OF PICRITE, PYROXENITE, ANORTHOSITE, OR BASALT. GEOPHYSICAL STUDIES HAVE SHOWN THAT THE MELLEN COMPLEX IN NORTHERN WISCONSIN DOES NOT CONNECT TO THE DULUTH COMPLEX ACROSS LAKE SUPERIOR BASIN TO FORM A LOPOLITH.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No
Production years NONE

Land status

Ownership category National Forest

Comments on the reserve resource information

  • THE PROSPECT AVERAGES ABOUT 0.1 WT PERCENT NI AND 0.3 WT PERCENT CU. NO TONNAGE ESTIMATE IS AVAILABLE.

Comments on the workings information

  • WORKINGS CONSIST OF SEVERAL DRILL HOLES.

Comments on development

  • ECON.COM: THE MELLEN COMPLEX ATTRACTED ATTENTION OF PROSPECTORS AT THE BEGINNING OF THE 20TH CENTURY.

Reference information

Bibliographic references

  • Deposit

    BAKHEIT, A.K., 1981, PETROGRAPHY OF CU-NI MINERALIZATION IN MINERAL LAKE AREA, ASHLAND COUNTY, WISCONSIN: UNIVERSITY OF WISCONSIN-MADISON, M.S. THESIS, 104 P

  • Reserve-Resource

    BAKHEIT, 1981.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-96 Sutphin, David M. U.S. Geological Survey
Updater 01-MAR-97 Sutphin, David 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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