| Deposit ID | 10012455 |
|---|---|
| MRDS ID | D008095 |
| Record type | Site |
| Current site name | Ruby Reef Claims |
| Alternate or previous names | Ruby Reef, Ruby Reef No. 1 |
| Geographic coordinates: | -103.60917, 43.69302 (WGS84) |
|---|---|
| Elevation | 1622 |
| Location accuracy | 1000(meters) |
| Relative position | 5 MI SOUTH OF CUSTER, SOUTH DAKOTA. |
Political divisions (FIPS codes)
Custer(county)
South Dakota(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Cicero Peak(quadrangle 1:24,000 scale)
Mount Rushmore(quadrangle 1:100,000 scale)
Hot Springs(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Middle Cheyenne-Spring(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 | 004E | 23 | E2 OF NW | South Dakota |
| Commodity | Importance |
|---|---|
| Mica | Primary |
| Materials | Type of material |
|---|---|
| Mica | Ore |
| Oligoclase | Gangue |
| Quartz | Gangue |
| Sillimanite | Gangue |
| Tourmaline | Gangue |
| Host or associated | Associated | ||||
|---|---|---|---|---|---|
| Rock type | Metamorphic Rock > Gneiss | ||||
| |||||
| Host or associated | Associated |
|---|---|
| Rock type | Plutonic Rock > Pegmatite |
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Metasedimentary Rock > Quartzite |
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Schist > Mica Schist |
| (1) | -103.60917, 43.69302 |
|---|
| General form | LENTICULAR TO TABULAR |
|---|---|
| Strike | N15W |
| Dip | 65SW |
| Development status | Past Producer |
|---|---|
| Commodity type | Non-metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1943 |
| Discoverer | Louis Stratton And Francis Michaud |
| Year of first production | 1943 |
| Year of last production | 1944 |
| District name | Custer District |
|---|
| Ownership category | National Forest |
|---|---|
| Area name | Black Hills |
| Type | Owner |
|---|---|
| Owner | L. H. Jefferies |
| Home office | Custer, S.D |
| First year | 1944 |
| Type of workings | Surface/Underground |
|---|---|
| Overall length | 13.72M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D008095 |
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.
USGS PP 247, P. 186-188.
ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS: SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18.
USGS PP 247, P. 186.
| Subject category | Comment text |
|---|---|
| Deposit | ONE ON THE RUBY REEF NO. 1 AND FOUR OTHERS ON THE RUBY REEF. MANY SUB-PARALLEL PEGMATITES. ZONING IS POORLY DEFINED OR ABSENT. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-OCT-1981 | Barari, Rachel A. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.