Twin Brothers Mine

Past Producer in Lemhi county in Idaho, United States with commodities Gold, Copper, Lead, Silver
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. Mineral rights holdings
  15. Land status
  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 10070386
MRDS ID W013289
MAS/MILS ID 0160590635
Record type Site
Current site name Twin Brothers Mine
Alternate or previous names Twin Sisters Mine

Geographic coordinates

Geographic coordinates: -113.92342, 45.54519 (WGS84)
Elevation 1402
Location accuracy 250(meters)
Relative position 3000 FT S17W OF GIBBONSVILLE

Site location context

Political divisions (FIPS codes)

Lemhi(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gibbonsville(quadrangle 1:24,000 scale)

Wisdom(quadrangle 1:100,000 scale)

Dillon(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Salmon-Panther(hydrologic unit)

Salmon(hydrologic accounting unit)

Lower Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Salmon-Challis 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 Lemhi

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 026N 021E 25, 36 S2 OF SW (25), NENW (36) Idaho

Comments on the location information

  • Info From Land.St :(1978)

Commodities

Commodity Importance
Gold Primary
Copper Tertiary
Lead Tertiary
Silver Tertiary

Comments on the commodity information

  • Lower Grade Ore Than Properties North Of Dahlonega Creek

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Rock unit name Yellowjacket Formation
    Rock description Yellowjacket
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1) -113.92342, 45.54519

Economic information

Ore body information

  • Width 1.83M

Controls for ore emplacement

  • Fissures

Comments on the geologic information

  • Original ore control entry:
    Fissures

Economic information about the deposit and operations

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

Mining district

District name Gibbonsville District

Mineral rights holdings

Type of mineral rights Patented

Land status

Ownership category Private

Comments on the production information

  • Total Production To 1913 Estimated At $300,000.

Workings at the site

  • Type of workings Underground
    Length 1524M

Comments on the workings information

  • 5000 Ft Of Adits And Raises

Comments on development

  • 4 Pat Claims, 1 Pat Millsite, 10-Stamp Mill (1913)

Reference information

Bibliographic references

  • Deposit

    Mackenzie, 1949, U Of Id Ms Thesis

  • Production

    Umpleby, J. B., 1913, USGS Bulletin 528, 82 P.

  • Deposit

    Umpleby, J. B., 1913, U.S. Geological Survey Bulletin 528, P. 133-134.

  • Deposit

    Mining And Scientific Press, 1912, Vol. 105, P. 47-49.

  • Deposit

    U.S. Bureau Of Mines Open-File Report MLA 93-25, 1993, P. 18-20.

General comments

Subject category Comment text
Deposit 4 Or 5 E-W Fissure Veins 5 Or 6ft Wide At Most

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1976 Bainbridge, Terri L.; Miller, Pat U.S. Geological Survey
Updater 01-MAR-1983 Loen, Jeffrey S. (Pearson, Robert C.) U.S. Geological Survey
Reporter 26-APR-1994 Mayerle, Ronald T. U.S. Bureau of Mines

Beyond USGS

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