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Custer Mica Lodes Nos. 1 and 2

Occurrence 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. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10011974
MRDS ID D007190
Record type Site
Current site name Custer Mica Lodes Nos. 1 and 2

Geographic coordinates

Geographic coordinates: -103.57417, 43.49052 (WGS84)
Elevation 1646
Location accuracy 500(meters)
Relative position 1.5 MI NORTHEAST 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

Minnekahta NE(quadrangle 1:24,000 scale)

Hot Springs(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 005E 18 SW South Dakota

Commodities

Commodity Importance
Mica Primary

Comments on the commodity information

  • MOST MICA IS LOCATED IN THE CORE, NO. 2 CLAIM MICA IS IN BOOKS AS LARGE AS 6 INCHES. THE MICA IS HARD, DARK RUBY MICA, SLIGHTLY AIR STAINED

Materials information

Materials Type of material
Muscovite Ore
Albite Gangue
Quartz Gangue

Alteration

  • (Local) Slightly Air-Stained

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 Plutonic Rock > Pegmatite

Nearby scientific data

(1) Minnelusa Formation
ListMap

Economic information

Ore body information

  • Thickness 0.91M
    Length 30.48M

Economic information about the deposit and operations

Development status Occurrence
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 G. W. Siewert

Workings at the site

  • Type of workings Surface/Underground
    Area 0.002HA
    Overall depth 3.05M
    Overall length 4.57M
    Overall width 3.66M

Comments on the workings information

  • NO. 1 LODE-2 SMALL OPEN PITS. ONE IS 15 FEET LONG, 12 FEET WIDE AND 6 FEET DEEP. THE OTHER IS 10 FEET LONG AND 8 FEET DEEP. NO. 2 LODE-A SMALL SHAFT 10 FEET DEEP.

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

General comments

Subject category Comment text
Deposit BOTH PROPERTIES CONSIST OF SINGLE UNPATENTED CLAIMS. THREE ZONES PRESENT. NO. 1 CLAIM: 80 FT LONG AND 2 FT THICK. NO. 2 CLAIM DIMENSIONS ARE STATED ABOVE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1981 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