Milford Mine, Cuyuna North Range, Crow Wing County, Minnesota, USAi
| Regional Level Types | |
|---|---|
| Milford Mine | Mine (Tourist Attraction) |
| Cuyuna North Range | Mountain Range |
| Crow Wing County | County |
| Minnesota | State |
| USA | Country |
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Latitude & Longitude (WGS84):
46° 32' 14'' North , 93° 58' 28'' West
Latitude & Longitude (decimal):
Type:
Mine (Tourist Attraction) - last checked 2023
Deposit first discovered:
1917
Köppen climate type:
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Cuyuna Rock, Gem and Mineral Society | Brainerd, Minnesota | 26km |
Other/historical names associated with this locality:
Ida Mae Mine
The Milford Mine (Section 23 T47N R29W) opened in 1917 as an underground mine and produced ore until 1933. It was the site of a major mine disaster in 1924 when a collapse flooded most of the workings and killed 41 miners. The mine site is now preserved as a memorial park with trails,displays and remains of some of the mine site workings. The Proterozoic Trommald Formation at the mine was substantially manganifeorus. The rocks there also displayed substantial faulting and drag folding and had minerals such as grunerite, suggesting higher metamorphic grades than elsewhere in the range.
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
4 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:
| ⓘ Grunerite Formula: ◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2 References: |
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Quartz Formula: SiO2 |
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 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Grunerite | 9.DE.05 | ◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
| O | Oxygen | |
| O | ⓘ Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Fe | Iron | |
| Fe | ⓘ Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
Other Databases
| Wikipedia: | https://en.wikipedia.org/wiki/Milford_Mine |
|---|---|
| Wikidata ID: | Q28125979 |
| Link to USGS MRDS: | 10219508 |
Other Regions, Features and Areas containing this locality
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Milford Mine, Cuyuna North Range, Crow Wing County, Minnesota, USA