| Deposit ID | 10078275 |
|---|---|
| MRDS ID | W026529 |
| Record type | Site |
| Current site name | Polaris Mine |
| Alternate or previous names | Silver Fissure |
| Related records | 10147980 |
| Geographic coordinates: | -113.08589, 45.36683 (WGS84) |
|---|---|
| Elevation | 2188 |
| Relative position | APPROXIMATELY 26 MILES NW FROM DILLON, MONTANA |
Political divisions (FIPS codes)
Beaverhead(county)
Montana(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Polaris(quadrangle 1:24,000 scale)
Salmon(quadrangle 1:100,000 scale)
Dillon(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Beaverhead(hydrologic unit)
Missouri Headwaters(hydrologic accounting unit)
Missouri Headwaters(hydrologic subregion)
Missouri(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Montana | Beaverhead |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Montana Principal | 005S | 012W | 28 | Montana |
| Commodity | Importance |
|---|---|
| Silver | Primary |
| Copper | Primary |
| Zinc Critical | Primary |
| Lead | Primary |
| Gold | Secondary |
| Materials | Type of material |
|---|---|
| Copper | Ore |
| Galena | Ore |
| Sphalerite | Ore |
| Host or associated | Host | ||
|---|---|---|---|
| Rock type | Sedimentary Rock > Carbonate > Limestone | ||
| Rock unit name | Madison Limestone;Quartzite (Hanging Wall) | ||
| Rock description | Madison Limestone;Quartzite (Hanging Wall) | ||
| |||
| (1) | -113.08589, 45.36683 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Eastward Thrust Faulting |
| Type of structure | Local |
| Structure description | Fault Zone (Polaris Fault) Strikes N 60 Deg E And Dips Approximately 45 To 60 Degrees Nw. |
| General form | IRREGULAR, LENSES |
|---|---|
| Strike | N 60 E |
| Dip | 50 NW |
| Width | 6.1M |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1883 |
| Year of first production | 1884 |
| District name | Polaris (Lost Cloud) District |
|---|
| Type | Operator |
|---|---|
| Owner | Midnite Mines, Inc. Spokane |
| First year | 1976 |
| Type | Owner |
|---|---|
| Owner | Milton E. Hayes, Wisdom, Mt |
| Year | 1965 |
|---|---|
| Period | 1908 - 1965 |
| Material | AU |
| Accuracy | Accurate |
| Description | Cp_Grade: ^4243 Short Tons Of Ore Mined 1908 - 1965 |
| Type of workings | Underground |
|---|---|
| Length | 1524M |
| Overall depth | 198.12M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | W026529 |
MBMG BULL 85, P. 120-123.
USGS BULL 574, P. 76.
LAWSON, D.C., 1977, DIRECTORY OF MINING ENTERPRISES, 1976: MT. BUREAU OF MINES AND GEOL., BULL. 103, P. 3.
1914 RECON WINCHELL, A.N., U.S.G.S. BULL. 574
1972 COMPILE M.B.M.G. BULL. 85
GEACH, R. D., 1972 , MINES AND MIN DEPOSITS (EXCEPT FUELS) BEAVERHEAD CO., MONT, P. 179
| Subject category | Comment text |
|---|---|
| Deposit | POLARIS FAULT WAS MINERALIZED FOR SEVERAL HUNDRED FEET ALONG STRIKE AND IS ABOUT 10-20 FT. WIDE. LENSES OF HIGH-GRADE SILVER ORE WERE SEPARATED BY LOWER GRADE (12-40 OZ/TON) SEGMENTS RAKE OF ORE WAS 45 DEG TO SW |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-MAR-1977 | Mc Kenzie, Craig L.; R. B. Berg | U.S. Geological Survey | |
| Updater | 01-AUG-1980 | Loen, Jeffrey S. (Pearson, Robert C.) | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.