Armour No. 1 and No. 2 mines, Cuyuna North Range, Crow Wing County, Minnesota, USAi
| Regional Level Types | |
|---|---|
| Armour No. 1 and No. 2 mines | Mine (Abandoned) |
| Cuyuna North Range | Mountain Range |
| Crow Wing County | County |
| Minnesota | State |
| USA | Country |
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Latitude & Longitude (WGS84):
46° 29' 1'' North , 93° 58' 12'' West
Latitude & Longitude (decimal):
Type:
Mine (Abandoned) - last checked 2023
Deposit first discovered:
1910
KΓΆppen climate type:
Nearest Clubs:
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Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Cuyuna Rock, Gem and Mineral Society | Brainerd, Minnesota | 23km |
Mindat Locality ID:
52907
Long-form identifier:
mindat:1:2:52907:6
GUID (UUID V4):
3fd6f6fe-59d0-42bd-9218-2994687fd44f
The Armour #1 and Armour #2 mines (sec. 10 and 11 T46N R9W) began as underground workings by Inland Steel at in 1910, with the first ore shipped in 1912. Mining continued into the 1960's, with the deepest operations at the 800 foot level. Strip mining began on both properties in 1915. The mines remained active until the 1970's. The ore was exceptionally manganiferous, with values up to 14% locally. The ore was in the thin bedded ferruginous chert portion of the Proterozoic Trommald banded iron formation. Both mines had abundant masses of chlorite schist complexly interspersed with ore. At the Armour #2 mine textural evidence suggest at least part of it is thought to be metamorphosed igneous rock (quartz diorite) and, with the rest metamorphosed wall rock of the Rabbit Lake Formation. The chlorite schist oxidizes to a hematite schist. The Armour mines eventually became part of the Pennington Mine.
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Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
3 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 DiagramDetailed Mineral List:
| β 'Chlorite Group' |
| β Hematite Formula: Fe2O3 |
| β Magnetite Formula: Fe2+Fe3+2O4 |
| β Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| β | Hematite | 4.CB.05 | Fe2O3 |
| β | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| β | 'Chlorite Group' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | β Hematite | Fe2O3 |
| O | β Magnetite | Fe2+Fe23+O4 |
| O | β Quartz | SiO2 |
| Si | Silicon | |
| Si | β Quartz | SiO2 |
| Fe | Iron | |
| Fe | β Hematite | Fe2O3 |
| Fe | β Magnetite | Fe2+Fe23+O4 |
Other Databases
| Link to USGS MRDS: | 10072531 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Superior DomainDomain
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References
