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Connecticut Mine, Eagle Harbor, Keweenaw County, Michigan, USAi
| Regional Level Types | |
|---|---|
| Connecticut Mine | Mine |
| Eagle Harbor | - not defined - |
| Keweenaw County | County |
| Michigan | State |
| USA | Country |
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Latitude & Longitude (WGS84):
47° 25' 22'' North , 88° 6' 35'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Copper Harbor | 108 (2017) | 17.4km |
| Ahmeek | 146 (2017) | 25.6km |
| Copper City | 187 (2017) | 26.0km |
| Laurium | 1,941 (2017) | 32.5km |
| Calumet | 703 (2017) | 32.5km |
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 |
|---|---|---|
| Copper Country Rock and Mineral Club | Dollar Bay, Michigan | 45km |
An underground copper mine consisting of 3 shafts located near Delaware. The Connecticut Mining Company was organized in 1853 and mining began shortly after. The mine worked the Connecticut Fissure, a series of 2 parallel veins approximately 200 feet apart. The veins were similar in nature; fine prehnite and quartz set in a coarse calcite. Copper was discovered in the veins and the Company drove 3 shafts along the veins in hopes of finding more copper; however, very little copper was found after the initial strike. Between 1853 and 1856, 116,800 pounds of copper was recovered. Beginning in 1857, the mine was worked on tribute until 1860 when the Amygdaloid Copper Company took control. In 1864 the Eagle Harbor Mining Company took control and split the lands up into 3 separate strips of land to organize 3 new companies. Today, the mine piles are known to produce datolite with translucent interiors, a prized find. Also from the Connecticut are copper, prehnite, thomsonite, and greenstone as well.
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
8 valid minerals.
Detailed Mineral List:
| ⓘ Analcime Formula: Na(AlSi2O6) · H2O References: |
| ⓘ Datolite Formula: CaB(SiO4)(OH) |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 References: |
| ⓘ Microcline Formula: K(AlSi3O8) |
| ⓘ Native Copper Formula: Cu |
| ⓘ Natrolite Formula: Na2Al2Si3O10 · 2H2O |
| ⓘ Prehnite Formula: Ca2Al2Si3O10(OH)2 |
| ⓘ Quartz Formula: SiO2 |
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 9 - Silicates | |||
| ⓘ | Datolite | 9.AJ.20 | CaB(SiO4)(OH) |
| ⓘ | Prehnite | 9.DP.20 | Ca2Al2Si3O10(OH)2 |
| ⓘ | Microcline | 9.FA.30 | K(AlSi3O8) |
| ⓘ | Natrolite | 9.GA.05 | Na2Al2Si3O10 · 2H2O |
| ⓘ | Analcime | 9.GB.05 | Na(AlSi2O6) · H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Analcime | Na(AlSi2O6) · H2O |
| H | ⓘ Datolite | CaB(SiO4)(OH) |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| H | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| B | Boron | |
| B | ⓘ Datolite | CaB(SiO4)(OH) |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Analcime | Na(AlSi2O6) · H2O |
| O | ⓘ Datolite | CaB(SiO4)(OH) |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Microcline | K(AlSi3O8) |
| O | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| O | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| O | ⓘ Quartz | SiO2 |
| Na | Sodium | |
| Na | ⓘ Analcime | Na(AlSi2O6) · H2O |
| Na | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Al | Aluminium | |
| Al | ⓘ Analcime | Na(AlSi2O6) · H2O |
| Al | ⓘ Microcline | K(AlSi3O8) |
| Al | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Al | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Si | Silicon | |
| Si | ⓘ Analcime | Na(AlSi2O6) · H2O |
| Si | ⓘ Datolite | CaB(SiO4)(OH) |
| Si | ⓘ Microcline | K(AlSi3O8) |
| Si | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Si | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| K | Potassium | |
| K | ⓘ Microcline | K(AlSi3O8) |
| Ca | Calcium | |
| Ca | ⓘ Datolite | CaB(SiO4)(OH) |
| Ca | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Cu | Copper | |
| Cu | ⓘ Native Copper | Cu |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
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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Connecticut Mine, Eagle Harbor, Keweenaw County, Michigan, USA