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Big Tom Mine

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

Geologic information

Identification information

Deposit ID 10055720
MRDS ID SD02447
Record type Site
Current site name Big Tom Mine
Alternate or previous names Kem Lode

Geographic coordinates

Geographic coordinates: -103.69418, 43.7219 (WGS84)
Elevation 1646
Location accuracy 500(meters)
Relative position 7 MILES SOUTHWEST 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

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)

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 07 NW South Dakota

Commodities

Commodity Importance
Feldspar Primary
Beryllium Critical Secondary
Mica Secondary

Materials information

Materials Type of material
Beryl Ore
Biotite Ore
Muscovite Ore
Albite Gangue
Amblygonite 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 Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -103.69418, 43.7219
ListMap

Economic information

Ore body information

  • General form KNOB
    Strike NE
    Dip 90
    Thickness 21.34M
    Length 45.72M
    Width 22.86M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No

Mining district

District name Custer District

Land status

Ownership category National Forest
Area name Black Hills National Forest

Ownership information

  • Type Operator
    Owner Consolidated Feldspar Corp.
    Home office Trenton, Nj
  • Type Owner
    Owner F. Michaud, P. Hibbard And M. Huemphreus
    Home office Custer, Sd

Comments on the production information

  • ABOUT 30 PERCENT OF THE MATERIAL MINED WAS SODA SPAR WHICH WAS SORTED & SHIPPED.

Workings at the site

  • Type of workings Surface
    Area 0.007HA
    Overall depth 9.14M
    Overall length 15.24M
    Overall width 4.57M

Comments on the workings information

  • THERE ARE SEVERAL SMALL CUTS

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

General comments

Subject category Comment text
Deposit TWO UNPATENTED CLAIMS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-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