| Deposit ID | 10012475 |
|---|---|
| MRDS ID | D008121 |
| Record type | Site |
| Current site name | Rainbow No. 4 Claim |
| Geographic coordinates: | -103.69557, 43.72968 (WGS84) |
|---|---|
| Elevation | 1695 |
| Relative position | 5.5 MILES SOUTHWEST OF CUSTER, SOUTH DAKOTA. |
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 | 004E | 06 | NW OF SW | South Dakota |
| Commodity | Importance |
|---|---|
| Feldspar | Primary |
| Mica | Primary |
| Beryllium Critical | Primary |
| Materials | Type of material |
|---|---|
| Beryl | Ore |
| Feldspar | Ore |
| Mica | Ore |
| Garnet | Gangue |
| Quartz | Gangue |
| Tourmaline | Gangue |
| Triphylite | Gangue |
| Uraninite | Gangue |
| Uranophane | Gangue |
| Vanadinite | Gangue |
| Result | MICA SHOW "A" STRUCTURE AND AIR STAINING. |
|---|
| Host or associated | Associated | ||||
|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Pegmatite | ||||
| |||||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Schist > Mica Schist |
| Host or associated | Host |
|---|---|
| Rock type | Plutonic Rock > Pegmatite |
| (1) | -103.69557, 43.72968 |
|---|
| Type of structure | Local |
|---|---|
| Structure description | N20e |
| General form | DIKES |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Both |
| Deposit size | Small |
| Significant | No |
| District name | Custer District |
|---|
| Ownership category | |
|---|---|
| Area name | Black Hills |
| Type | Owner |
|---|---|
| Owner | Consolidated Feldspar Corp. |
| Home office | Trenton, N.J. |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D008121 |
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.
ROBERTS, W. L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKORA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18.
USGS PP 247, P. 181-183.
U.S. BUREAU OF MINES INFO CIRC 7707.
| Subject category | Comment text |
|---|---|
| Deposit | UNPATENTED CLAIM. 2 GOOD-SIZED DIKES. THE LARGE DIKE IS MADE UP OF THREE ZONES. THE INTERMEDIATE ZONE CONTAINS 10 - 20% MICA AND 1 - 2% BERYL. MICA IS 10% OF THE WALL ZONE AND FELDSPAR CONSISTS OF 60% OF THE WALL ZONE. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-NOV-1981 | Barari, Rachel A. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.