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Gap Lode

Past Producer in Pennington county in South Dakota, United States with commodities Mica, 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. 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. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10010782
MRDS ID D004751
Record type Site
Current site name Gap Lode

Geographic coordinates

Geographic coordinates: -103.56, 43.86524 (WGS84)
Elevation 1890
Relative position 1.5 MI NORTH OF SYLVAN LAKE

Site location context

Political divisions (FIPS codes)

Pennington(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)

Black Elk Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States South Dakota Pennington

Public Land Survey System information

Meridian Township Range Section Fraction State
Black Hills 002S 005E 19 South Dakota

Comments on the location information

  • NE 1/4, NE 1/4

Commodities

Commodity Importance
Mica Primary
Feldspar Primary

Materials information

Materials Type of material
Muscovite Ore
Plagioclase Ore
Quartz Gangue

Alteration

  • (Local) Mica Is Air Stained And Clouded By Inclusions

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Rock unit name Harney Peak Granite;Pegmatite
    Rock description Harney Peak Granite;Pegmatite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -103.56, 43.86524
ListMap

Economic information

Ore body information

  • General form DIKE
    Strike N 70 E
    Dip 80 N
    Thickness 5.49M
    Length 600M

Economic information about the deposit and operations

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

Mining district

District name Unorganized District

Land status

Ownership category National Forest
Area name Black Hills National Forest

Ownership information

  • Type Owner
    Owner Francis Michaud And W.W. Wright

Comments on the workings information

  • THREE TRENCH-LIKE OPEN PITS ON ONE, ONE OPEN PIT ON THE SECOND, NORTHERN DIKE

Comments on development

  • ECON.COM: RUBY MICA IN BOOKS UP TO 15 INCHES IN DIAMETER AND THREE INCHES THICK.

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 2 PEGMATITE DIKES, 135 FT APART

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-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