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Thomas Lake Deposit

Unknown in Lake county in Minnesota, United States with commodities Iron, Titanium, Metal
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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. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10082796
MRDS ID W062146
Record type Site
Current site name Thomas Lake Deposit

Geographic coordinates

Geographic coordinates: -91.23904, 48.00694 (WGS84)
Location accuracy 1000(meters)
Relative position Est Location Is Estimated Using 1:24000 Map Showing Thomas Lake.

Site location context

Political divisions (FIPS codes)

Lake(county)

Minnesota(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Kekekabic Lake(quadrangle 1:24,000 scale)

Basswood 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)

Boundary Waters Canoe Area Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Minnesota Lake

Public Land Survey System information

Meridian Township Range Section Fraction State
4th Principal 64N 7W Minnesota

Comments on the location information

  • THE MAIN DEPOSIT LIES NORTH OF THOMAS LAKE.

Commodities

Commodity Importance
Iron Primary
Titanium, Metal Critical Primary

Materials information

Materials Type of material
Ilmenite Ore
Magnetite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Anorthosite
    Rock unit name Duluth Complex - undivided
    Stratigraphic age (youngest) Mesoproterozoic

Nearby scientific data

(1) -91.23904, 48.00694
ListMap

Economic information

Geologic structures

Type of structure Local
Structure name Near contact between Duluth Complex and country rock -- Iron Formation?
Type of structure Regional
Structure name On The Northern Margin Of The Duluth Complex.

Ore body information

  • General form STRATIFORM

Comments on the geologic information

  • GROUT (1950) CONSIDERED THE THOMAS LAKE DEPOSITS TO BE CHIEFLY TYPE 1 DEPOSITS--INCLUSIONS OF BANDED GUNFLINT IRON-FORMATION, WITH A SMALL TYPE 2 OREBODY AOLNG THE SW TIP OF THE LAKE.

Economic information about the deposit and operations

Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Northern Range

Comments on the reserve resource information

  • BEYOND THE 14 DEPOSITS HE NOTED CONTAINING 81.6 MILLION TONS OF RESOURCES, GROUT (1950) ESTIMATED THAT ABOUT 50 ADDITIONAL SMALL DEPOSITS WERE LOCATED IN COOK COUNTY WITH AN INFERRED TONNAGE OF 552,000 TONS OF TITANIFEROUS MAGNETITE. THESE DEPOSITS ARE TOO SMALL AND TOO LEAN TO BE OF COMMERCIAL INTEREST.

Comments on development

  • WINCHELL (1897) REPORTED THAT THE TITANIFEROUS IRON ORES OF THE DULUTH COMPLEX WERE DISCOVERED ABOUT 1867, ABOUT THE SAME TIME AS THE MESABI RANGE IRON ORES.

Reference information

Bibliographic references

  • Deposit

    GROUT, F.F., 1950, THE TITANIFEROUS MAGNETITES OF MINNESOTA: ST. PAUL, MINN., COMMISSIONER OF THE IRON RANGE RESOURCES AND REHABILATION, 117 P.

  • Deposit

    HAUCK AND OTHERS, IN PRESS, AN OVERVIEW OF THE GEOLOGY AND OXIDE, SULFIDE, AND PLATINUM-GROUP ELEMENT MINERALIZATION ALONG THE WESTERN AND NORTHERN CONTACTS OF THE DULUTH COMPLEX, IN OJAKANGAS, R.W., DICKAS, A.B., AND GREEN, J.C.,EDS., [SPECIAL PAPRE IN THE MIDCONTINENT RIFT SYSTEM]: GEOLOGICAL SOCIETY OF AMERICA SPECIAL PAPER, IN PRESS.

  • Deposit

    CANNON, W.F., AND MCGERVEY, T.A., 1991, MAP SHOWING MINERAL DEPOSITS OF THE MIDCONTINENT RIFT, LAKE SUPERIOR REGION, UNITED STATES AND CANADA; U.S. GEOLOGICAL SURVEY MISCELLANEOUS FIELD STUDIES MAP, MF-2153, SCALE 1;500,000, 1 SHEET.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-95 Sutphin, David M. (Cannon, W. F.) 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.

Maps centered on this site