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  3. Mineral Resource Data System (MRDS)

Midas 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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Controls for ore emplacement
  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 10012459
MRDS ID D008102
Record type Site
Current site name Midas Mine

Geographic coordinates

Geographic coordinates: -103.60028, 43.70024 (WGS84)
Elevation 1622
Location accuracy 500(meters)
Relative position 1.5 MI SOUTHWEST OF EVERGREEN SCHOOL IN CUSTER COUNTY, 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

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 14 SE South Dakota

Commodities

Commodity Importance
Mica Primary

Comments on the commodity information

  • HARD, FLAT, RUBY MICA OF GOOD GRADE.

Materials information

Materials Type of material
Mica Ore
Albite Gangue
Quartz 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) -103.60028, 43.70024
ListMap

Economic information

Ore body information

  • General form DIKES
    Strike N20W
    Dip STEEPLY WEST
    Plunge 33
    Plunge direction SW
    Length 173.74M
    Width 2.44M

Controls for ore emplacement

  • Mica Is Most Common Around The Outer Edges And In The N 200 Ft Of The Dike.

Economic information about the deposit and operations

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

Mining district

District name Custer District

Land status

Ownership category
Area name Black Hills

Ownership information

  • Type Operator
    Owner Joe Cummings
    Home office Custer S.D.
    First year 1943
    Last year 1944
  • Type Owner
    Owner Jesse Brocha
    Home office Custer S.D.

Comments on the production information

  • GOOD QUALITY LARGE AND SMALL SHEET.

Comments on the reserve resource information

  • ABOVE THE 80 FT LEVEL.

Workings at the site

  • Type of workings Surface/Underground
    Area 0.005HA
    Overall depth 3.35M
    Overall length 15.24M
    Overall width 3.66M

Comments on the workings information

  • OPEN PIT DIMENSIONS. DRIFTS AND SMALL STOPES WERE DRIVEN FROM A 60 FT SHAFT INCLINED 70 DEG TO THE WEST.

Comments on development

  • DIAMOND DRILLED IN APRIL 1944 BY THE USBM. THE MINE WAS A MARGINAL OPERATOR UNDER CONDITIONS EXISTING IN 1944.

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

    USGS PP 247, P. 157.

General comments

Subject category Comment text
Deposit AVERAGE WIDTH IS 4 FT. PARALLEL PEGMATITES TO THE WEST CONVERGE TO THE SOUTH TO FORM A LARGE COMPOSITE. UNPATENTED. DIP IS 50-70 DEG NW OR SW DEPENDING ON THE PART OF THE PEGMATITE MEASURED. PLUNGE IS 25-40 DEG SW.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1981 Barari, Rachel A. U.S. Geological Survey

Beyond USGS

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

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