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Lafayette Mine, Porcupine Mountains, Ontonagon County, Michigan, USAi
| Regional Level Types | |
|---|---|
| Lafayette Mine | Mine |
| Porcupine Mountains | Mountain Range |
| Ontonagon County | County |
| Michigan | State |
| USA | Country |
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Latitude & Longitude (WGS84):
46° 46' 40'' North , 89° 49' 14'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| White Pine | 474 (2017) | 18.2km |
| Wakefield | 1,725 (2017) | 34.8km |
| Bessemer | 1,770 (2017) | 37.4km |
| Ironwood | 5,002 (2017) | 44.8km |
| Marenisco | 254 (2017) | 45.6km |
Commodities (Major) - Copper
Deposit Type: Secondary Enrichment
Development Status: Past Producer
Deposit Model: 96: Native Cu
Host Rock Unit: Copper Harbor Formation
Host Rock: Sandstone
The Lafayette Mining Company was organized in 1861 to explore the former Ohio and Isle Royale Mine. A company report stated that a huge vein was thought to run across the property. During exploration of the vein, numerous silver specimens were recovered. In 1863, the shaft previously sunk by the Ohio and Isle Royale was cleared and worked by the Lafayette. The formations at the Lafayette were the same as the Carp Lake Mine. The mine was a mojor producer during the Civil War but was abandoned in 1866. Between 1866 and 1906, the mine was worked under tribute. Today some pits and artifacts remain, but are not to be disturbed as this is State Park property.
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:
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Chalcocite Formula: Cu2S |
| ⓘ 'Chlorite Group' |
| ⓘ 'K Feldspar' |
| ⓘ Native Copper Formula: Cu |
| ⓘ Native Silver Formula: Ag |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| ⓘ | Native Silver | 1.AA.05 | Ag |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcocite | 2.BA.05 | Cu2S |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'K Feldspar' | - | |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcocite | Cu2S |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Cu | Copper | |
| Cu | ⓘ Chalcocite | Cu2S |
| Cu | ⓘ Native Copper | Cu |
| Ag | Silver | |
| Ag | ⓘ Native Silver | Ag |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Mid-continent DomainDomain
- Mid-continent RiftNarrow Rift
USA
- Michigan
- Keweenaw PeninsulaPeninsula
- Midcontinent RiftGeologic Province
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