| Deposit ID | 10011235 |
|---|---|
| MRDS ID | D005577 |
| Record type | Site |
| Current site name | Dark Horse Mine |
| Geographic coordinates: | -112.99535, 46.30017 (WGS84) |
|---|---|
| Elevation | 2402 |
| Relative position | 1.6 KM W OF SPRING. |
Political divisions (FIPS codes)
Powell(county)
Montana(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Mount Powell(quadrangle 1:24,000 scale)
Butte North(quadrangle 1:100,000 scale)
Butte(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Clark Fork(hydrologic unit)
Pend Oreille(hydrologic accounting unit)
Kootenai-Pend Oreille-Spokane(hydrologic subregion)
Pacific Northwest(hydrologic region)
Federal lands
Beaverhead-Deerlodge National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Montana | Powell |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Montana Principal | 006N | 011W | 05,04 | NE OF SE (05); NW OF SW (04) | Montana |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Silver | Secondary |
| Copper | Secondary |
| Materials | Type of material |
|---|---|
| Gold | Ore |
| Limonite | Gangue |
| Quartz | Gangue |
| Result | 1 OZ/TON AU, 0.5 OZ/TON AG. |
|---|
| Host or associated | Associated | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite | ||||||||
| Rock unit name | Mt. Powell Batholith | ||||||||
| Rock description | Mt. Powell Batholith | ||||||||
| |||||||||
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Carbonate > Limestone |
| Rock unit name | Hasmark Formation |
| Rock description | Hasmark Formation |
| (1) | -112.99535, 46.30017 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Mount Powell Batholith |
| Type of structure | Local |
| Structure description | Racetrack Pluton |
| General form | LENS |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1918 |
| Discoverer | Thomas Daniels |
| Year of first production | 1931 |
| Year of last production | 1940 |
| District name | Racetrack (Danielsville) District |
|---|
| Ownership category | National Forest |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D005577 |
MBMG BULL 84, P. 48.
MBMG BULL 98, P. 25, 61.
MBMG BULL 98, P. 61.
| Subject category | Comment text |
|---|---|
| Deposit | VEINLIKE LODES IN THE LIMESTONE NEAR AND APPROXIMATELY PARRALLEL TO THE CONTACT WITH INTRUSIVE ROCK. MANGANESE OXIDE HAS FORMED SMALL REPLACEMENT LENSES AND LODES IN THE LIMESTONE. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-DEC-1980 | Wise, Kristine K. (Elliott, James E.) | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.