The Ironton Mine (Sec 11 T46N R29W) was first worked in 1912-1913 by the Cuyuna-Duluth Iron Company. It was later taken over by Inland Steel. The last ore was shipped in 1933. The mine worked hematite from the thin bedded portion of the Proterozoic Trommald Formation. There were several rich ore bodies separated by a mass of chloritic schist.

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Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Iron

Mineral List

ⓘ Hematite

ⓘ Magnetite

2 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

ⓘ Chert

Detailed Mineral List:

ⓘ Hematite

Formula: Fe₂O₃

References:

USGS Prof Paper 407

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Hematite	4.CB.05	Fe₂O₃

List of minerals for each chemical element

O	Oxygen
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	Iron
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄

Other Databases

Link to USGS MRDS:	10072770

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

Superior Craton
- Minnesota River Valley TerraneCraton
Superior DomainDomain

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References

Harder, E. C., Johnston, A. W. (1918) Preliminary Report on the Geology of East Central Minnesota Including the Cuyuna Iron-ore District. Bulletin 15. Minnesota Geological Survey

Schmidt, R.G. (1963) Geology and ore deposits of the Cuyuna North Range, Minnesota: U.S. Geological Survey Professional Paper 407, 96 p.

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