| Deposit ID | 10101739 |
|---|---|
| MRDS ID | D008126 |
| Record type | Site |
| Current site name | Tiptop Lode |
| Geographic coordinates: | -103.66974, 43.71552 (WGS84) |
|---|---|
| Elevation | 1643 |
| Relative position | 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 | 08 | NE OF SW | South Dakota |
| Commodity | Importance |
|---|---|
| Feldspar | Primary |
| Mica | Secondary |
| Beryllium Critical | Secondary |
| Lithium Critical | Secondary |
| Materials | Type of material |
|---|---|
| Amblygonite | Ore |
| Beryl | Ore |
| Biotite | Ore |
| Muscovite | Ore |
| Apatite | Gangue |
| Cleavelandite | Gangue |
| Purpurite | Gangue |
| Quartz | Gangue |
| Spodumene | Gangue |
| Tourmaline | Gangue |
| Vivianite | Gangue |
| Host or associated | Associated | ||||
|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Pegmatite | ||||
| |||||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Schist > Mica Schist |
| (1) | -103.66974, 43.71552 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Black Hills Uplift |
| Type of structure | Local |
| Structure description | Ridge-Like Hill |
| General form | CRESCENT-SHAPED DIKE |
|---|---|
| Strike | N45W |
| Dip | 40SW |
| Width | 60.96M |
| Development status | Past Producer |
|---|---|
| Commodity type | Both |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1880 |
| Discoverer | William Nevin |
| Year of first production | 1880 |
| District name | Custer District |
|---|
| Ownership category | |
|---|---|
| Area name | Black Hills |
| Type | Operator |
|---|---|
| Owner | International Minerals And Chemical Corp. (Imc) |
| Home office | P.O. Box 71, Carlsbad, N.M. 88220 |
| Type | Owner |
|---|---|
| Owner | Nevin, William |
| Home office | Custer, S.D. |
| Type of workings | Surface/Underground |
|---|---|
| Overall depth | 12.19M |
| Overall length | 45.72M |
| Overall width | 15.24M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D008126 |
USBM INFO CIRC 7707, P. 149-150.
USGS PP 247, P. 205-206.
SDGS RI 44, P. 8-12.
SDGS MR 10, P. 5.
SDGS MR 11, P. 5.
AM MIN VOL 54, P. 1312-1323.
USGS PP 247, P. 206; SDGS MR 10, P. 5; SDGS MR 11, P. 5.
| Subject category | Comment text |
|---|---|
| Deposit | ONE UNPATENTED CLAIM. GIANT CRYSTALS OF POTASH FELDSPAR ARE CONCENTRATED NEAR THE CENTRAL PORTION OF THE PEGMATITE. PEGMATITE IS COARSE TO VERY COARSE GRAINED. NOT ZONED. |
| 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.