Ferro Mine (Duluth-Brainerd Mine), Cuyuna North Range, Crow Wing County, Minnesota, USAi
| Regional Level Types | |
|---|---|
| Ferro Mine (Duluth-Brainerd Mine) | Mine (Abandoned) |
| Cuyuna North Range | Mountain Range |
| Crow Wing County | County |
| Minnesota | State |
| USA | Country |
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Latitude & Longitude (WGS84):
46° 30' 42'' North , 94° 1' 19'' West
Latitude & Longitude (decimal):
Type:
Mine (Abandoned) - last checked 2023
Deposit first discovered:
1913
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 | 22km |
Mindat Locality ID:
52890
Long-form identifier:
mindat:1:2:52890:7
GUID (UUID V4):
a792cf59-f32f-4354-adde-0307c99c8a1e
The Ferro Mine (Sec 33 T47N R29W) was an underground mine opened in 1913. The ore was largely ferruginous chert and carbonate iron formation of the Trommald Formation. The mine was worked on and off thorugh 1944. The iron ore was particularly high in manganese. Manganese mineralization also was prominent along joints and fractures in the adjacent rocks. Acmite-rich units were interlayered with the iron-formation.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
5 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| β Aegirine Formula: NaFe3+Si2O6 |
| β Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) References: |
| β Hematite Formula: Fe2O3 |
| β Magnetite Formula: Fe2+Fe3+2O4 |
| β Pyrolusite Formula: Mn4+O2 References: |
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 | Pyrolusite | 4.DB.05 | Mn4+O2 |
| Group 9 - Silicates | |||
| β | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| β | Aegirine | 9.DA.25 | NaFe3+Si2O6 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | Oxygen | |
| O | β Aegirine | NaFe3+Si2O6 |
| O | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | β Hematite | Fe2O3 |
| O | β Magnetite | Fe2+Fe23+O4 |
| O | β Pyrolusite | Mn4+O2 |
| Na | Sodium | |
| Na | β Aegirine | NaFe3+Si2O6 |
| Al | Aluminium | |
| Al | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | Silicon | |
| Si | β Aegirine | NaFe3+Si2O6 |
| Si | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | Calcium | |
| Ca | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Mn | Manganese | |
| Mn | β Pyrolusite | Mn4+O2 |
| Fe | Iron | |
| Fe | β Aegirine | NaFe3+Si2O6 |
| Fe | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | β Hematite | Fe2O3 |
| Fe | β Magnetite | Fe2+Fe23+O4 |
Other Databases
| Link to USGS MRDS: | 10267817 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Superior DomainDomain
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References
