| Deposit ID | 10082681 |
|---|---|
| MRDS ID | W062030 |
| Record type | Site |
| Current site name | Ernst Mine |
| Geographic coordinates: | -88.23754, 45.90889 (WGS84) |
|---|---|
| Location accuracy | 100(meters) |
| Relative position | ADJACENT TO COMMONWEALTH, WI. |
Political divisions (FIPS codes)
Florence(county)
Wisconsin(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Florence East(quadrangle 1:24,000 scale)
Iron Mountain(quadrangle 1:100,000 scale)
Iron Mountain(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Brule(hydrologic unit)
Northwestern Lake Michigan(hydrologic accounting unit)
Northwestern Lake Michigan(hydrologic subregion)
Great Lakes(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Wisconsin | Florence |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 40N | 18W | 27 | SW2 OF SW4 OF SW4 | Wisconsin |
| Commodity | Importance |
|---|---|
| Iron | Primary |
| Materials | Type of material |
|---|---|
| Goethite | Ore |
| Hematite | Ore |
| Magnetite | Ore |
| Quartz | Gangue |
| Model code | 241 |
|---|---|
| USGS model code | 34a |
| Deposit model name | Superior Fe (BC name is Lake Superior & Rapitan types iron-formation) |
| Host or associated | Host | ||||
|---|---|---|---|---|---|
| Rock type | Sedimentary Rock > Chemical Sediment > Iron Formation | ||||
| Rock unit name | Vulcan Iron Formation | ||||
| Rock description | Vulcan Iron Formation | ||||
| |||||
| (1) | -88.23754, 45.90889 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Major Troughs Into Which Iron Fm. Has Slumped; Regional Trends Are E-W To Ne-Sw. |
| General form | STRATABOUND |
|---|---|
| Dip | 50-55 N |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1849 |
| Year of first production | 1914 |
| Year of last production | 1929 |
| Production years | 1914 TO 1929 EXCEPT FOR 1921-1924 AND 1926-1928 |
| District name | Menominee Iron District |
|---|
| Type of workings | Underground |
|---|---|
| Area | 85.47HA |
| Overall depth | 152.4M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | W062030 |
LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES, 2D ED.: CLEVELAND, OHIO, LAKE SUPERIOR IRON ORE ASSOCIATION, 334 P
LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, P. 107-128.
| Subject category | Comment text |
|---|---|
| Deposit | VULCAN IRON FORMATION CONSISTS OF THINNLY BEDDED LAYERS OF MAGNETITE, MARTITE, AND SPECULARITE, ALTERNATING WITH QUARTZ-RICH LAYERS; MINOR LOW-IRON SILICATE MINERALS ARE PRESENT (DUTTON AND ZIMMER, 1968). THE FORMATION RANGES FROM 300-800 FT THICK. |
| Deposit | THE GEOLOGY CONSISTS OF PRECAMBRIAN W CRYSTALLINE ROCKS OVERLAIN BY PRECAMBRIAN X SEDIMENTARY ROCKS. DURING PRECAMBRIAN X TIME, PRECAMBRIAN W ROCKS BLOCK FAULTED AND DIFFERENTIALLY RAISED; LOWERED; FORMING TROUGHS. PRECAMBRIAN X SEDIMENTS SLUMPED INTO THE TROUGHS. AT ABOUT THE SAME TIME, THE ENTIRE AREA WAS REGIONALLY THERMAL METAMORPHOSED. THIS AREA OF THE MENOMINEE DISTRICT IS IN THE CHLORITE AND BIOTITE ISOGRADS. ALTHOUGH BOTH THE VULCAN IRON FM. AND THE RIVERTON IRON FM. ARE PRECAMBRIAN X IN AGE, THE VULCAN IRON FM. IS THE OLDER. THE VULCAN IRON FM. IS PART OF THE MENOMINEE GROUP. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-OCT-95 | Sutphin, David M. (Cannon, W. F.) | U.S. Geological Survey | |
| Updater | 01-MAR-97 | Sutphin, David M. | U.S. Geological Survey | |
| Editor | 01-MAY-97 | Mason Jr., G.T. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.