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Silver Dollar Mine

Past Producer in Custer county in South Dakota, United States with commodities Mica, Beryllium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10097813
MRDS ID D008100
Record type Site
Current site name Silver Dollar Mine

Geographic coordinates

Geographic coordinates: -103.61667, 43.72274 (WGS84)
Elevation 1646
Location accuracy 1000(meters)
Relative position 4.25 MI SOUTH-SOUTHWEST OF CUSTER, SOUTH DAKOTA., 0.5 Mile Radius, 0.5 Mile Radius, 0.5 Mile Radius, 0.5 Mile Radius

Site location context

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)

Geographic areas

Country State County
United States South Dakota Custer

Public Land Survey System information

Meridian Township Range Section Fraction State
Black Hills 004S 004E 11 NW South Dakota

Comments on the location information

  • LIES A FEW HUNDRED FEET SOUTHEAST OF THE CHICAGO, BURLINGTON AND QUINCY RAILROAD TRACKS.

Commodities

Commodity Importance
Mica Primary
Beryllium Critical Tertiary

Comments on the commodity information

  • FLAT, HARD, RUBY MICA. MOST BOOKS ARE SMALL.

Materials information

Materials Type of material
Beryl Ore
Muscovite Ore
Apatite Gangue
Biotite Gangue
Kyanite Gangue
Oligoclase Gangue
Quartz Gangue
Tourmaline Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Schist > Mica Schist

Nearby scientific data

(1) -103.61667, 43.72274
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Below The 55 Ft Level Is A Strong Fracture Zone Related To A Fault That Strikes N10w And Dips 20 Ne. There Is Little Displacement, But There Are Numerous Related Joints.

Ore body information

  • General form LENTICULAR
    Strike N20W
    Dip 50SW
    Plunge 50SW
    Length 91.44M
    Width 6.71M

Controls for ore emplacement

  • Mica Bearing Zone, Several Feet Wide, Extends Into Both The Border Zone And The Core

Comments on the geologic information

  • THE QUARTZ-MICA SCHIST STRIKES N20W AND DIPS 45-70 DEG SW.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Discovery year 1942
Discoverer S. T. Gamber

Mining district

District name Custer District

Land status

Ownership category
Area name Black Hills

Ownership information

  • Type Owner
    Owner Custer Mining Account
    First year 1946

Comments on the reserve resource information

  • USGS PP 247, P. 191.

Workings at the site

  • Type of workings Surface/Underground
    Area 0.018HA
    Overall depth 21.64M
    Overall length 30.48M
    Overall width 6.1M

Comments on the workings information

  • THE CUT IS 20 FT DEEP. A SHAFT IS 7 FT DEEP WITH SMALL DRIFTS AND RAISES AND A FEW STOPES.

Reference information

Bibliographic references

  • Deposit

    U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.

  • Deposit

    ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18.

  • Deposit

    USGS PP 247, P. 190-191.

  • Production

    U.S. BUREAU OF MINES INFORMATION CIRCULAR 7707.

General comments

Subject category Comment text
Deposit ZONING IS PRONOUNCED.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-81 Barari, Rachel A. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site