Isle Royal No. 1 shaft, Isle Royale Mines, Houghton, Houghton Co., Michigan, USAi
| Regional Level Types | |
|---|---|
| Isle Royal No. 1 shaft | Shaft (Abandoned) |
| Isle Royale Mines | Group of Mines |
| Houghton | - not defined - |
| Houghton Co. | County |
| Michigan | State |
| USA | Country |
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Key
Latitude & Longitude (WGS84):
47° 6' 47'' North , 88° 33' 57'' West
Latitude & Longitude (decimal):
Locality type:
Shaft (Abandoned) - last checked 2020
Deposit first discovered:
1852
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Houghton | 7,970 (2017) | 1.0km |
| Hancock | 4,555 (2017) | 1.9km |
| Dollar Bay | 1,082 (2017) | 4.2km |
| South Range | 746 (2017) | 7.6km |
| Hubbell | 946 (2017) | 12.3km |
The northernmost shaft of the Isle Royale Mine and one of the company’s earliest workings. The site contains small poor rock piles near the corner of Sharon and Portage Avenues where some copper and silver can be found. Exposed near the site is a mineralized outcrop of the Isle Royale Lode that contains two oxidized zones where fine microcrystals of Malachite and Azurite can be found. The Isle Royale Lode, where this shaft was located, was said to be one of the better locations for silver on the Keweenaw Peninsula.
Select Mineral List Type
Standard Detailed Gallery Strunz Dana Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
10 valid minerals.
Detailed Mineral List:
| ⓘ Azurite Formula: Cu3(CO3)2(OH)2 Reference: Mineralogy of Michigan (2004) Heinrich & Robinson |
| ⓘ Calcite Formula: CaCO3 Reference: Yalmer F Primeau collection |
| ⓘ Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 Description: Chrysocolla was found as light, turquoise blue coatings on masses of native copper collected from a heavily oxidized ‘mud pocket’ at the Malachite/Azurite locality in April 2020. The Chrysocolla was obscured by a thick layer of crumbly Malachite Reference: Yalmer Primeau Collection |
| ⓘ Copper Formula: Cu Reference: Yalmer F Primeau collection |
| ⓘ Cuprite Formula: Cu2O Reference: Mineralogy of Michigan (2004) Heinrich & Robinson |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 Habit: Rings Description: Fine microcrystals are collected from two oxidized zones of the Isle Royale Lode at a small surface working near the #1 Shaft.
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson |
| ⓘ Prehnite Formula: Ca2Al2Si3O10(OH)2 Reference: Yalmer F Primeau collection |
| ⓘ Quartz Formula: SiO2 Reference: Mineralogy of Michigan (2004) Heinrich & Robinson |
| ⓘ Silver Formula: Ag Reference: Yalmer F Primeau collection |
| ⓘ Tenorite Formula: CuO Description: Black dendritic coatings on fracture surfaces near oxidized zones at the Malachite/Azurite locality. Reference: Yalmer F Primeau Collection |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Copper | 1.AA.05 | Cu |
| ⓘ | Silver | 1.AA.05 | Ag |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Cuprite | 4.AA.10 | Cu2O |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Tenorite | 4.AB.10 | CuO |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 9 - Silicates | |||
| ⓘ | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| ⓘ | Prehnite | 9.DP.20 | Ca2Al2Si3O10(OH)2 |
List of minerals arranged by Dana 8th Edition classification
| Group 1 - NATIVE ELEMENTS AND ALLOYS | |||
|---|---|---|---|
| Metals, other than the Platinum Group | |||
| ⓘ | Copper | 1.1.1.3 | Cu |
| ⓘ | Silver | 1.1.1.2 | Ag |
| Group 4 - SIMPLE OXIDES | |||
| A2X | |||
| ⓘ | Cuprite | 4.1.1.1 | Cu2O |
| AX | |||
| ⓘ | Tenorite | 4.2.3.1 | CuO |
| Group 14 - ANHYDROUS NORMAL CARBONATES | |||
| A(XO3) | |||
| ⓘ | Calcite | 14.1.1.1 | CaCO3 |
| Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN | |||
| ⓘ | Azurite | 16a.2.1.1 | Cu3(CO3)2(OH)2 |
| ⓘ | Malachite | 16a.3.1.1 | Cu2(CO3)(OH)2 |
| Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings | |||
| Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings | |||
| ⓘ | Prehnite | 72.1.3.1 | Ca2Al2Si3O10(OH)2 |
| Group 74 - PHYLLOSILICATES Modulated Layers | |||
| Modulated Layers with joined strips | |||
| ⓘ | Chrysocolla | 74.3.2.1 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Group 75 - TECTOSILICATES Si Tetrahedral Frameworks | |||
| Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si | |||
| ⓘ | Quartz | 75.1.3.1 | SiO2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| H | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| C | Carbon | |
| C | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Cuprite | Cu2O |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| O | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | ⓘ Tenorite | CuO |
| Al | Aluminium | |
| Al | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Al | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Si | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Cu | Copper | |
| Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | ⓘ Cuprite | Cu2O |
| Cu | ⓘ Copper | Cu |
| Cu | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | ⓘ Tenorite | CuO |
| Ag | Silver | |
| Ag | ⓘ Silver | Ag |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Butler, B.S., and Burbank, W.S. (1929) The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pages.
Robinson, G.W. (2004) Mineralogy of Michigan by E.W. Heinrich (2nd edition). A.E. Seaman Mineral Museum, Michigan Technological University, Houghton, Michigan, 252 pages.
Kaminski-Hamka, T. (2011) Copper Mines of Houghton County, Michigan. Copperlady Press, 120 pages.
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Isle Royal No. 1 shaft, Isle Royale Mines, Houghton, Houghton Co., Michigan, USA