| Deposit ID | 10082630 |
|---|---|
| MRDS ID | W060068 |
| Record type | Site |
| Current site name | Delaware Mine |
| Alternate or previous names | Conglomerate Mine |
| Geographic coordinates: | -88.10643, 47.41972 (WGS84) |
|---|---|
| Relative position | GRANT TOWNSHIP |
Political divisions (FIPS codes)
Keweenaw(county)
Michigan(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Delaware(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 | Keweenaw |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Michigan | 058N | 030W | 14, 15 | ALL | Michigan |
| Commodity | Importance |
|---|---|
| Copper | Primary |
| Materials | Type of material |
|---|---|
| Copper | Ore |
| 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 | Portage Lake Volcanics | ||||
| Rock description | Portage Lake Volcanics | ||||
| |||||
| (1) | -88.10643, 47.41972 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Syncline |
| Type of structure | Local |
| Structure description | Four veins worked south of the Greenstone flow and under the Allouez conglo |
| General form | IRREGULAR |
|---|
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Year of first production | 1847 |
| Year of last production | 1886 |
| District name | Keweenaw Copper |
|---|
| Type | Operator |
|---|---|
| Owner | Northwest Copper Co. |
| First year | 1847 |
| Last year | 1861 |
| Type | Operator |
|---|---|
| Owner | Pennsylvania Mining Co. |
| First year | 1861 |
| Last year | 1863 |
| Type | Operator |
|---|---|
| Owner | Delaware Mining Co. |
| First year | 1863 |
| Last year | 1881 |
| Type | Operator |
|---|---|
| Owner | Conglomerate Mining Co. |
| First year | 1881 |
| Year | 1886 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1847-1886 | ||||||||||||||
| Accuracy | Accurate | ||||||||||||||
| |||||||||||||||
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF. PAPER NO. 144, 238 PP.
CORNWALL, H.R., 1954, BEDROCK GEOLOGY OF THE DELAWARE QUADRANGLE, MICHIGAN: USGS MAP GQ-51, SCALE 1:24000
JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, KEWEENAW COUNTY, P. 104-106, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.
BUTLER AND BURBANK (1929)
| Subject category | Comment text |
|---|---|
| Deposit | FOUR VEINS WERE WORKED - THE STOUTENBERG, DELAWARE, HOGAN AND PENNSYLVANIA FISSURES RICHNESS OF ORE DECREASED AWAY FROM FISSURES |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JUL-1995 | Nicholson, Suzanne | 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 | 05-AUG-2001 | Anderson, Arlene (M. Gere) | Michigan Department of Natural Resources |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.