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Homestake Mine

Past Producer in Idaho county in Idaho, United States with commodities Gold, Silver, Lead, Copper
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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. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Mineral rights holdings
  17. Land status
  18. Ownership information
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. Reporter information

Geologic information

Identification information

Deposit ID 10105756
MRDS ID W015138
MAS/MILS ID 0160490121
Record type Site
Current site name Homestake Mine
Alternate or previous names Twin Circles, Badger, Pennsylvania Lode

Geographic coordinates

Geographic coordinates: -115.52876, 45.66348 (WGS84)
Elevation 1859
Relative position ABOUT 4 MI SE OF OROGRANDE

Site location context

Political divisions (FIPS codes)

Idaho(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Orogrande(quadrangle 1:24,000 scale)

Elk City(quadrangle 1:100,000 scale)

Elk City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork Clearwater(hydrologic unit)

Clearwater(hydrologic accounting unit)

Lower Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Nez Perce-Clearwater 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 Idaho Idaho

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 027N 007E 12, 13, 24 Idaho
Boise 027N 008E 19 NWSWNW Idaho

Comments on the location information

  • Near Crest Of High Divide Separating Drainage Basins Of The Salmon And Clearwater Rivers
  • On Divide Between Crooked River And Big Creek

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Lead Tertiary
Copper Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Covellite Ore
Galena Ore
Malachite Ore
Pyromorphite Ore
Sphalerite Ore
Tetrahedrite Ore
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Gouge
  • (Local) Sericitization
  • (Local) Oxidation
  • (Local) Staining

Analytical data

Result ASSAYS ACROSS 30 TO 36 INCHES SHOWED .20 TO 1.44 OZ AU/TON, 0.2 TO 1.9 OZ AG/TON.
Result SAMPLE OF QUARTZ VEIN ASSAYED :\n6.02 OZ AU, \n5.1 OZ AG/TON, \n3.2% PB, \nRACE CU
Result DUMP SAMPLE ASSAYED :\n2.48 OZ. AU, \n1.0 OZ AG/TON.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Idaho Batholith
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Rock type qualifier Dike
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock type qualifier Dike
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
    Rock type qualifier Porphyritic Dacite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Belt Supergroup
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -115.52876, 45.66348
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Faults Strike N 35 - 50 Deg E, Dip 65 - 85 Deg Nw, Displace Vein Up To 110 Ft

Ore body information

  • Strike S 80 DEG E
    Dip 80 DEG S
    Thickness 1.22M
    Length 30.48M
    Width 1.83M

Controls for ore emplacement

  • Fissure
  • Faulting

Comments on the geologic information

  • 3 Veins - Most Work On Homestake Vein. Pyrite Main Source Of Gold, Galena Main Source Of Silver

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1897
Discoverer Sam Silverman
Year of first production 1898

Mining district

District name Orogrande District

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category National Forest
Area name Nez Perce National Forest

Ownership information

  • Type Owner
    Owner James Penman Mines Co. (C. W. Brochman, Mgr.)
  • Type Owner
    Owner Twin Circles Mining Corp.

Comments on the production information

  • A Few Tons Of Au Ore Were Produced In 1898.
  • Penman Mine Production Is Combined With The Homestake Mine (See WFOC Production Files).

Workings at the site

  • Type of workings Surface/Underground
    Length 518.16M

Comments on the workings information

  • Tunnels, Trenches

Comments on development

  • 2 Patented, 7 Unpatented Claims

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1974 Miller, Pat J. U.S. Geological Survey
Reporter 01-DEC-1976 Siefken, Robert R. (Miller, Pat) U.S. Geological Survey
Reporter 12-OCT-1990 Western Field Operations Center (WFOC) U.S. Bureau of Mines
Reporter 07-OCT-1991 Rains, Richard U.S. Bureau of Mines

Beyond USGS

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

External references

Maps centered on this site