| Deposit ID | 10055769 |
|---|---|
| MRDS ID | SD02514 |
| Record type | Site |
| Current site name | Michaud Prospect |
| Geographic coordinates: | -103.71946, 43.68885 (WGS84) |
|---|---|
| Elevation | 1632 |
| Relative position | 6.5 MILES SW OF CUSTER. REACHED BY GOING FROM NINEMILE RANCH, ON PLEASANT VALLEY ROAD 3.5 MILES NORTH ON LIGHTENING CREEK ROAD TO THE MICHAUD RANCH AND ABOUT 0.5 MILE FARTHER TO WHERE THE CUTS ARE VISIBLE ON THE HILLSIDE EAST OF THE ROAD. |
Political divisions (FIPS codes)
Custer(county)
South Dakota(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Fourmile(quadrangle 1:24,000 scale)
Mount Rushmore(quadrangle 1:100,000 scale)
Hot Springs(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Angostura Reservoir(hydrologic unit)
Cheyenne(hydrologic accounting unit)
Cheyenne(hydrologic subregion)
Missouri(hydrologic region)
Federal lands
Black Hills National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | South Dakota | Custer |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Black Hills | 004S | 003E | 14 | E2 | South Dakota |
| Commodity | Importance |
|---|---|
| Beryllium Critical | Primary |
| Mica | Secondary |
| Feldspar | Secondary |
| Materials | Type of material |
|---|---|
| Albite | Ore |
| Beryl | Ore |
| Muscovite | Ore |
| Quartz | Gangue |
| Tourmaline | Gangue |
| Host or associated | Associated | ||||
|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Pegmatite | ||||
| |||||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Schist |
| Host or associated | Host |
|---|---|
| Rock type | Plutonic Rock > Pegmatite |
| (1) | -103.71946, 43.68885 |
|---|
| Strike | N 35 W |
|---|---|
| Dip | 75 NE |
| Length | 36.58M |
| Width | 7.62M |
| Development status | Past Producer |
|---|---|
| Commodity type | Both |
| Deposit size | Small |
| Significant | No |
| District name | Unorganized District |
|---|
| Ownership category | National Forest |
|---|---|
| Area name | Black Hills |
| Type | Owner |
|---|---|
| Owner | Custer Pegmatite Co. |
| First year | 1942 |
| Type of workings | Surface |
|---|---|
| Overall depth | 3.05M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | SD02514 |
U. S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707, P. 198
USGS PP 247, P. 157.
USGS PP 247., P. 157; USBM INFO CIRC 7707, P. 198
| Subject category | Comment text |
|---|---|
| Deposit | BE IS MASSIVE OR IN 'SHELLS'. THE MASSES RANGE IN DIAMETER FROM 1-12 IN AND ARE MIXED WITH ABUNDANT ALBITE AND A LITTLE MUSCOVITE. ONE WALL OF THE LARGE CUT CONTAINED ABOUT 20% BE. (1942) |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-NOV-1982 | Barari, Rachel A. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.