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Plummer Mine

Past Producer in Itasca county in Minnesota, United States with commodity Iron
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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. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10072864
MRDS ID W018561
Record type Site
Current site name Plummer Mine
Related records 10170464

Geographic coordinates

Geographic coordinates: -93.39606, 47.3211 (WGS84)

Site location context

Political divisions (FIPS codes)

Itasca(county)

Minnesota(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bovey(quadrangle 1:24,000 scale)

Pokegama Lake(quadrangle 1:100,000 scale)

Hibbing(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Prairie-Willow(hydrologic unit)

Mississippi Headwaters(hydrologic accounting unit)

Mississippi Headwaters(hydrologic subregion)

Upper Mississippi(hydrologic region)

Geographic areas

Country State County
United States Minnesota Itasca

Public Land Survey System information

Meridian Township Range Section Fraction State
56N 24W 29,27,21 Minnesota

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Ankerite Ore
Magnetite Ore
Minnesotaite Ore
Siderite Ore
Calcite Gangue
Chert Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Iron Formation
    Rock unit name Biwabik Iron Formation
    Stratigraphic age (youngest) Paleoproterozoic

Nearby scientific data

(1) -93.39606, 47.3211
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure name Restricted Basin Required For Banded Iron Formation A A91 24000
Type of structure Local
Structure name Faults

Ore body information

  • General form LINEAR
    Dip SOUTH: AT A LOW ANGLE
    Thickness 243.84M
    Length 321860M
    Depth to top 0M

Controls for ore emplacement

  • Inavailability Of Free Oxygen Allowing Ferrous Oxides To Form. Advent Of Photosynthetic Eucaryotic Organisms Releasing O2 2 B.Y. Ago Upset The Oxygen Poor Environment Required For Continued Ferrous Iron Deposition (Garrells, Et Al, 1973).

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant No

Mining district

District name Lake Superior Region, Mesabi District

Ownership information

  • Type Owner
    Owner U.S. Steel Corp.

Reference information

Bibliographic references

  • Deposit

    MOREY, G.B.,1972. MESABI RANGE; IN; SIMS,P.K. AND MOREY, G.B.,EDS., GEOLOGY OF MINNESOTA; A CENTENNIAL VOLUME,MINN.GEOL.SURV.,P.204-217.

  • Deposit

    WHITE, D.A.,1954. STRATIGRAPHY AND STRUCTURE OF THE MESABI RANGE, MINNESOTA, MINN.GEOL.SURV.BULL.38, 92P.

  • Production

    TRETHEWEY, W.D., 1974, UNIV. MINN. BULL., MINING DIRECTORY ISSUE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1984 Schneider, Norma J. U.S. Geological Survey
Updater 01-NOV-1981 Schneider, Norma J. (Orris, Greta J.) 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.

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

  • U.S. Steel Corp. — now part of United States Steel Corporation (2024)
    Mining operations largely divested over the late 20th century; the broader U.S. Steel entity was acquired by Nippon Steel in 2024 (mining footprint is now minimal).

Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.

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