| Deposit ID | 10082610 |
|---|---|
| MRDS ID | W060045 |
| Record type | Site |
| Current site name | Iroquois Amygdaloid |
| Alternate or previous names | Iroquis Lode, Iroquois Amygdaloid Lode |
| Related records | 10121977 |
| Geographic coordinates: | -88.36255, 47.31667 (WGS84) |
|---|---|
| Relative position | 1.5 MILES NORTH OF TOWN OF MOHAWK |
Political divisions (FIPS codes)
Keweenaw(county)
Michigan(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Mohawk(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 | 057N | 032W | 22 | SW OF NW | Michigan |
| Commodity | Importance |
|---|---|
| Copper | Primary |
| Materials | Type of material |
|---|---|
| Copper | Ore |
| Calcite | Gangue |
| Prehnite | 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 | Portage Lake Volcanics | ||||
| Rock description | Portage Lake Volcanics | ||||
| |||||
| (1) | -88.36255, 47.31667 |
|---|
| Type of structure | Local |
|---|---|
| Structure description | Amygdaloidal flow top |
| General form | AMYGDALOIDAL LODE |
|---|
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Deposit size | Large |
| Significant | No |
| Discovery year | 1942 |
| Year of last production | 1968 |
| District name | Keweenaw Copper |
|---|
| Year | 1968 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1942-1968 | ||||||||||||||
| Accuracy | Accurate | ||||||||||||||
| |||||||||||||||
WEEGE, R.J., AND POLLACK, J.P., 1971, RECENT DEVELOPMENTS IN THE NATIVE COPPER DISTRICT OF MICHIGAN: IN W.S. WHITE, (EDITOR) GUIDEBOOK FOR FIELD CONFERENCE, MICHIGAN COPPER DISTRICT, SEPT. 30-OCT. 2, 1971, SOC. ECON. GEOL., P. 19-43.
WHITE, W.S., 1968, THE NATIVE COPPER DEPOSITS OF NORTHERN MICHIGAN: IN J.D. RIDGE (EDITOR) ORE DEPOSITS OF THE UNITED STATES 1933-1967 (GRATON-SALES); AM. INSTIT. MIN. METALL. PETROL. ENG., V. 1, P. 303-325.
DAVIDSON, E.S, ESPENSHADE, G.H., WHITE, W.S., AND WRIGHT, J.C., 1955, BEDROCK GEOLOGY OF THE MOHAWK QUADRANGLE, MICHIGAN: USGS MAP GQ-54, SCALE 1:24000
WEEGE AND POLLACK, 1971; WHITE, 1968
| Subject category | Comment text |
|---|---|
| Deposit | EXPLORATORY SHAFT OPENED IN 1942 - MINED MORE OR LESS CONTINUOUSLY UNTIL 1968 DEEPEST WORKINGS ARE MORE THAN 1300 FEET BELOW THE SURFACE |
| 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 |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.