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Hoodoo - Union Hill Mine

Past Producer in Lawrence county in South Dakota, United States with commodities Gold, Silver
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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. 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 10055538
MRDS ID SD02110
Record type Site
Current site name Hoodoo - Union Hill Mine
Alternate or previous names Eureka Mine

Geographic coordinates

Geographic coordinates: -103.67557, 44.33163 (WGS84)
Elevation 1646
Relative position 1.5 MI NORTHWEST OF GALENA, SOUTH DAKOTA

Site location context

Political divisions (FIPS codes)

Lawrence(county)

South Dakota(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Deadwood South(quadrangle 1:24,000 scale)

Rapid City(quadrangle 1:100,000 scale)

Rapid City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Belle Fourche(hydrologic unit)

Belle Fourche(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 Lawrence

Public Land Survey System information

Meridian Township Range Section Fraction State
Black Hills 004N 004E 05,06 South Dakota

Comments on the location information

  • SW 1/4 OF SEC. 5 AND SE 1/4 OF SEC. 6

Commodities

Commodity Importance
Gold Primary
Silver Primary

Materials information

Materials Type of material
Gold Ore
Silver Ore
Limonite Gangue
Pyrite Gangue

Alteration

  • (Local) Pyrite Cementing Material Oxidized To Limestone Near Surface

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Quartz Monzonite Porphyry
    Rock description Quartz Monzonite Porphyry
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite

Nearby scientific data

(1) -103.67557, 44.33163
ListMap

Economic information

Controls for ore emplacement

  • Brecciated Zones

Comments on the geologic information

  • IN THE SAME MASS OF QUARTZ MONZONITE PORPHYRY AS THE GILT EDGE MINE.

Economic information about the deposit and operations

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

Mining district

District name Galena District

Land status

Ownership category National Forest
Area name Black Hills National Forest

Ownership information

  • Type Owner-Operator
    Owner Branch Mint Mining And Milling Co.

Workings at the site

  • Type of workings Underground
    Overall depth 143.26M

Comments on the workings information

  • 3 SHAFTS - THE HOODOO, THE UNION HILL AND THE EUREKA. ALSO 4 PROSPECT TUNNELS. THE EUREKA SHAFT IS 200 FT DEEP. THE HOODOO IS 300 FT DEEP WITH 450 FT OF LATERAL WORK ON THE 100 AND 200 FT LEVELS AND AN 800 FT DRIFT AT THE BOTTOM WHICH CONNECTS TO THE UNION HILL SHAFT. THE UNION HILL SHAFT IS 470 FT DEEP.

Comments on development

  • 120 AC PATENTED MINERAL CLAIMS

Reference information

Bibliographic references

  • Deposit

    US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688 .

  • Deposit

    US GEOLOGICAL SURVEY, US BUREAU OF RECLAMATION, AND SOUTH DAKOTA GEOLOGICAL SURVEY, 1975 , MINERAL AND WATER RESOURCES OF SOUTH DAKOTA, SOUTH DAKOTA GEOLOGICAL SURVEY BULLETIN 16 .

  • Production

    US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688 US GEOLOGICAL SURVEY, US BUREAU OF RECLAMATION, AND SOUTH DAKOTA GEOLOGICAL SURVEY, 1975 , MINERAL AND WATER RESOURCES OF SOUTH DAKOTA, SOUTH DAKOTA GEOLOGICAL SURVEY BULLETIN 16

General comments

Subject category Comment text
Deposit ORE IN BRECCIATED ZONES

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1979 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