Nebraska Mine, Mass City, Ontonagon County, Michigan, USAi
| Regional Level Types | |
|---|---|
| Nebraska Mine | Mine |
| Mass City | Census-designated Place |
| Ontonagon County | County |
| Michigan | State |
| USA | Country |
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Latitude & Longitude (WGS84):
46° 44' 53'' North , 89° 7' 14'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Ontonagon | 1,324 (2017) | 20.1km |
| White Pine | 474 (2017) | 35.3km |
| South Range | 746 (2017) | 50.9km |
| Watersmeet | 428 (2017) | 53.6km |
The Nebraska Mining Company was organized in 1853 and began exploration along a line of ancient pits in the hillside. Miners began driving two adits in 1854 and recovered 33 tons of copper in the process. In 1855, another 35 tons of copper was removed, in addition to much silver. By 1856, miners had begun sinking three shafts on the property, all the while recovering mass and barrel copper. An 1859 company report stated that, because of the great mining depression that had hit in 1858, the company scaled back operations to stay open. During this time, the company also leased the mine to tributors. In 1863, the company reorganized and merged with the nearby Caledonia Mine, forming the New Caledonia Mining Company. During its time, the Nebraska produced approximately 128 tons of refined copper.
The Nebraska and Caledonia are connected underground through the lower adit levels. Today the mine is owned by Evergreen Explorations. Copper and silver can be found near the entrance, but the real prize here are the ancient "hammerstones" used by the prehistoric Native Americans to extract copper.
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.
Detailed Mineral List:
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) References: |
| ⓘ 'K Feldspar' References: |
| ⓘ 'K Feldspar var. Adularia' Formula: KAlSi3O8 References: |
| ⓘ Microcline Formula: K(AlSi3O8) References: |
| ⓘ Native Copper Formula: Cu References: |
| ⓘ Native Silver Formula: Ag References: |
| ⓘ Quartz Formula: SiO2 References: |
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 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ | Microcline | 9.FA.30 | K(AlSi3O8) |
| Unclassified | |||
| ⓘ | 'K Feldspar var. Adularia' | - | KAlSi3O8 |
| ⓘ | '' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | Oxygen | |
| O | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Microcline | K(AlSi3O8) |
| O | ⓘ Quartz | SiO2 |
| Al | Aluminium | |
| Al | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Microcline | K(AlSi3O8) |
| Si | Silicon | |
| Si | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Microcline | K(AlSi3O8) |
| Si | ⓘ Quartz | SiO2 |
| K | Potassium | |
| K | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| K | ⓘ Microcline | K(AlSi3O8) |
| Ca | Calcium | |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | Iron | |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Cu | Copper | |
| 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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Nebraska Mine, Mass City, Ontonagon County, Michigan, USA