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  3. Mineral Resource Data System (MRDS)

Triangle A Lode

Past Producer in Custer county in South Dakota, United States with commodity Feldspar
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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. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10012487
MRDS ID D008137
Record type Site
Current site name Triangle A Lode

Geographic coordinates

Geographic coordinates: -103.49806, 43.7069 (WGS84)
Elevation 1573
Location accuracy 500(meters)
Relative position 7 MI SOUTHEAST 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

Mount Coolidge(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

ST(Federal land areas administered by ST)

Geographic areas

Country State County
United States South Dakota Custer

Public Land Survey System information

Meridian Township Range Section Fraction State
Black Hills 004S 005E 14,15 NW (14); NE (15) South Dakota

Commodities

Commodity Importance
Feldspar Primary

Comments on the commodity information

  • THE FELDSPAR IS OF GOOD QUALITY EXCEPT FOR SOME INTERGROWN QUARTZ.

Materials information

Materials Type of material
Feldspar Ore
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 > Pegmatite

Nearby scientific data

(1) -103.49806, 43.7069
ListMap

Economic information

Ore body information

  • General form IRREGULAR 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 Lewis Collingwood
    Home office Custer, S.D.
    First year 1938

Comments on the production information

  • NONE OF THE FELDSPAR HAS BEEN SHIPPED; YEAR UNKNOWN.

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

  • Production

    USBM INFO CIRC 7707.

General comments

Subject category Comment text
Deposit THE DIKE IS EXPOSED FOR ABOUT 1000 FT ALONG THE STRIKE. THE BORDERS ARE IRREGULAR AND THE DIP IS UNCERTAIN.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-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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