| Deposit ID | 10082868 |
|---|---|
| MRDS ID | W062231 |
| Record type | Site |
| Current site name | Isle Royale Mine |
| Alternate or previous names | Old Isle Royale Mine, Dodge Exploration Formation |
| Geographic coordinates: | -88.58033, 47.09778 (WGS84) |
|---|---|
| Relative position | PORTAGE TOWNSHIP |
Political divisions (FIPS codes)
Houghton(county)
Michigan(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Chassell(quadrangle 1:24,000 scale)
Hancock(quadrangle 1:100,000 scale)
Hancock C(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Keweenaw Peninsula(hydrologic unit)
Southcentral Lake Superior(hydrologic accounting unit)
Southern Lake Superior(hydrologic subregion)
Great Lakes(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Michigan | Houghton |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Michigan | 54N | 34W | 2, 10, 11 | Michigan |
| Commodity | Importance |
|---|---|
| Copper | Primary |
| Silver | Secondary |
| Materials | Type of material |
|---|---|
| Copper | Ore |
| Feldspar | Gangue |
| Epidote | Gangue |
| Quartz | Gangue |
| Calcite | Gangue |
| Sericite | Gangue |
| Pumpellyite-(Mg) | Gangue |
| Model code | 96 |
|---|---|
| USGS model code | Unassigned |
| Deposit model name | Native Cu |
| Mark3 model number | 99 |
| Host or associated | Host | ||||
|---|---|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt | ||||
| Rock unit name | Isle Royale Amygdaloid | ||||
| Rock description | Isle Royale Amygdaloid | ||||
| |||||
| Host or associated | Host | ||||
|---|---|---|---|---|---|
| Rock type | |||||
| Rock unit name | Portage Lake Volcanics | ||||
| Rock description | Portage Lake Volcanics | ||||
| |||||
| (1) | -88.58033, 47.09778 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Syncline |
| Type of structure | Local |
| Structure description | Isle Royale syncline--the largest structure seen in the mine. The only fau |
| General form | TABULAR |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Medium |
| Significant | Yes |
| Year of first production | 1853 |
| Year of last production | 1885 |
| Production years | 1853-1885; 1901-1925 AND POSSIBLY LATER. |
| District name | Keweenaw Copper |
|---|
| Year | 1885 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1853-1885 | ||||||||||||||
| Accuracy | Accurate | ||||||||||||||
| |||||||||||||||
| Year | 1902 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Accuracy | Accurate | ||||||||||||||
| |||||||||||||||
| Year | 1925 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1853-1925 | ||||||||||||||
| Accuracy | Accurate | ||||||||||||||
| |||||||||||||||
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PP.
WHITE, W.S., 1956, GEOLOGIC MAP OF THE CHASSELL QUADRANGLE, MICHIGAN: USGS MAP MF-43, SCALE 1:24000.
JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, HOUGHTON COUNTY, SITE ID 310016, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.
BUTLER, B.S., AND BURBANK, W.S., 1929, P. 87.
| Subject category | Comment text |
|---|---|
| Deposit | UNDERGROUND MINE INVENTORY LIST THE DODGE EXPLORATION (SITE ID 310016) WAS INCORPORATED INTO THIS RECORD. |
| Deposit | THE DEPOSIT IS AN AMYGDALOIDAL LODE HAVING NUMEROUS FISSURES. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-MAR-1996 | Sutphin, D.M. (Cannon, W.F.) | U.S. Geological Survey | |
| Updater | 01-MAR-1997 | Sutphin, D.M. | U.S. Geological Survey | |
| Editor | 01-MAY-1997 | Mason Jr., G.T. | U.S. Geological Survey | |
| Editor | 04-AUG-2002 | Anderson, Arlene (M. Gere) | Michigan Department of Natural Resources |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.