| Deposit ID | 10082688 |
|---|---|
| MRDS ID | W062038 |
| Record type | Site |
| Current site name | Loretto Mine |
| Alternate or previous names | Appleton, Eleanor, Sturgeon River |
| Geographic coordinates: | -87.81808, 45.78694 (WGS84) |
|---|
Political divisions (FIPS codes)
Dickinson(county)
Michigan(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Vulcan(quadrangle 1:24,000 scale)
Escanaba(quadrangle 1:100,000 scale)
Escanaba(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Menominee(hydrologic unit)
Northwestern Lake Michigan(hydrologic accounting unit)
Northwestern Lake Michigan(hydrologic subregion)
Great Lakes(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Michigan | Dickinson |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| T39N | R29W | 12 | NW 1/4 - SE1/ | Michigan | |
| T39N | R28W | 7 | Michigan |
| Commodity | Importance |
|---|---|
| Iron | Primary |
| Materials | Type of material |
|---|---|
| Hematite | Ore |
| Magnetite | Ore |
| Goethite | 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) | -87.81808, 45.78694 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Major troughs into which Iron fm. has slumped; regional trends are E-W to N |
| 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 | 1893 |
| Year of last production | 1940 |
| Production years | 1893-1937; SHIPPED FROM STOCKPILE IN 1939 AND 1940. STURGEON RIVER (APPLETON) MINE PRODUCED IN 1887-1889. |
| District name | Menominee Iron District |
|---|
| Type | Operator |
|---|---|
| Owner | Loretto Iron Co. |
| Last year | 1927 |
| Type | Operator |
|---|---|
| Owner | American-Boston Mining Co. |
| First year | 1927 |
| Year | 1889 |
|---|---|
| Period | 1887-1889 |
| Material | ore Fe |
| Ore mined | 19714mt |
| Accuracy | Accurate |
| Year | 1907 |
|---|---|
| Period | 1892-1907 |
| Material | ore Fe |
| Ore mined | 19323mt |
| Accuracy | Accurate |
| Year | 1940 |
|---|---|
| Period | 1893-1940 |
| Material | ore Fe |
| Ore mined | 3750521mt |
| Accuracy | Accurate |
| Year | 1940 |
|---|---|
| Period | 1887-1940 |
| Material | ore Fe |
| Ore mined | 3789254mt |
| Accuracy | Accurate |
| Type of workings | Underground |
|---|---|
| Area | 1500HA |
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 | 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. |
| Deposit | VULCAN IRON FORMATION CONSISTS OF THINLY 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. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-OCT-1995 | 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 |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.