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  3. Mineral Resource Data System (MRDS)

Loon Lake

Occurrence in Cook county in Minnesota, United States with commodity Cobalt
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Controls for ore emplacement
  10. Economic information about the deposit and operations
  11. Links to other databases
  12. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10067842
MRDS ID W000709
Record type Site
Current site name Loon Lake

Geographic coordinates

Geographic coordinates: -90.7168, 48.06667 (WGS84)

Site location context

Political divisions (FIPS codes)

Cook(county)

Minnesota(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gunflint Lake(quadrangle 1:24,000 scale)

Saganaga Lake(quadrangle 1:100,000 scale)

Quetico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Rainy Headwaters(hydrologic unit)

Rainy(hydrologic accounting unit)

Rainy(hydrologic subregion)

Souris-Red-Rainy(hydrologic region)

Federal lands

Superior 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 Minnesota Cook

Commodities

Commodity Importance
Cobalt Critical Tertiary

Comments on the commodity information

  • IRREGULAR VEINS 1/2 TO 6 INCHES WIDE HAVE BEEN FOUND IN AN 8-FOOT ORE ZONE CUTTING A DIABASE SILL IN PRECAMBRIAN SLATES.

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Arsenopyrite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Argillite
    Rock unit name ROVE FORMATION
    Stratigraphic age (youngest) Paleoproterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
    Rock unit name Logan Sills
    Stratigraphic age (youngest) Mesoproterozoic

Nearby scientific data

(1) -90.7168, 48.06667
ListMap

Economic information

Controls for ore emplacement

  • VEINS

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Comments on the reserve resource information

  • RESERVES UNKNOWN. ABOVE COBALT% FROM ONE SAMPLE ONLY.

Reference information

Bibliographic references

  • Deposit

    BILBREY, J.H., 1962, US BUREAU OF MINES INF. CIRC. 8103, P. 29

  • Reserve-Resource

    REF.(1)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1972 Coury, Anny B. U.S. Geological Survey
Updater 01-MAR-1997 Sutphin, David 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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