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  3. Mineral Resource Data System (MRDS)

Surprise Mica Mine

Past Producer in Custer county in South Dakota, United States with commodity Mica
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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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10055653
MRDS ID SD02260
Record type Site
Current site name Surprise Mica Mine

Geographic coordinates

Geographic coordinates: -103.59667, 43.78079 (WGS84)
Elevation 1670
Relative position 0.5 MILE NORTH OF CUSTER, SOUTH DAKOTA

Site location context

Political divisions (FIPS codes)

Custer(county)

South Dakota(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Custer(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 003S 004E 24 South Dakota

Comments on the location information

  • NW 1/4

Commodities

Commodity Importance
Mica Primary

Materials information

Materials Type of material
Biotite Ore
Muscovite Ore
Albite Gangue
Apatite Gangue
Beryl Gangue
Garnet Gangue
Quartz Gangue
Tourmaline Gangue
Zircon Gangue

Alteration

  • (Local) Mica Is Heavily Stained

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Rock unit name Pegmatite
    Rock description Pegmatite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite

Nearby scientific data

(1) -103.59667, 43.78079
ListMap

Economic information

Ore body information

  • General form DIKE
    Strike EAST
    Dip 40 S
    Length 67.06M
    Width 2.44M

Comments on the geologic information

  • THE MICA OCCURS IN BOOKS UP TO 8 INCHES IN DIAMETER AND IS SCATTERED IRREGULARLY THROUGH THE MATRIX.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Deposit size Small
Significant No
Discovery year 1943

Mining district

District name Custer District

Land status

Ownership category National Forest
Area name Black Hills National Forest

Ownership information

  • Type Owner
    Owner J. T. Morine And F. D. Peterson

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 15.85M

Comments on the workings information

  • SMALL OPEN PITS AND SHORT DRIFTS OFF THE SHAFT.

Comments on development

  • ECON.COM: ALL SHEET MICA HAS BEEN 1.5 BY 2 INCHES OR SMALLER.

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

  • Production

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

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1980 Barari, Rachel A. U.S. Geological Survey

Beyond USGS

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

External references

Maps centered on this site