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Illinois Mine

Past Producer in Boise county in Idaho, United States with commodity Gold
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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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10069860
MRDS ID W007591
Record type Site
Current site name Illinois Mine

Geographic coordinates

Geographic coordinates: -115.78346, 43.88488 (WGS84)
Elevation 1463
Relative position 4 MI. NE OF IDAHO CITY

Site location context

Political divisions (FIPS codes)

Boise(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pioneerville(quadrangle 1:24,000 scale)

Idaho City(quadrangle 1:100,000 scale)

Hailey(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Boise-Mores(hydrologic unit)

Middle Snake-Boise(hydrologic accounting unit)

Middle Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Boise 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 Boise

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 006N 006E 05 Idaho

Comments on the location information

  • LOCATED AT THE HEAD OF ILLINOIS GULCH

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Limonite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Idaho Batholith-Quartz Monzonite;Aplite
    Rock description Idaho Batholith-Quartz Monzonite;Aplite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Miocene
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite

Nearby scientific data

(1) -115.78346, 43.88488
ListMap

Economic information

Ore body information

  • General form LINEAR
    Strike N 70 DEG W
    Dip 40 DEG SW
    Length 121.92M
    Width 12.19M

Controls for ore emplacement

  • Fracture Zone

Comments on the geologic information

  • PROMINENT FRACTURES N 70 DEG W, 60 - 65 DEG SW AND N 45 DEG E, 65 DEG SE. ONE FAULT N 20 DEG E - 150 FT. HORIZ. DISPLACEMENT

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1870

Mining district

District name Idaho City

Land status

Ownership category National Forest
Area name Boise National Forest

Comments on the production information

  • TOTAL PRODUCTION: $225,000 AU.

Workings at the site

  • Type of workings Surface/Underground
    Length 103.63M
    Overall depth 60.96M

Comments on the workings information

  • PLACER MINING TOOK PLACE BEFORE UNDERGROUND OPERATIONS.

Reference information

Bibliographic references

  • Deposit

    ANDERSON, ALFRED L., 1947, GEOLOGY AND ORE DEPOSITS OF BOISE BASIN, IDAHO, U. S. GEOL. SUR. BULL. 944 - C, P. 229

  • Deposit

    1947 GEOLMAP ANDERSON, A. L. BULL. 944 -

  • Production

    ANDERSON, A. L., 1947, USGS BULL. 944 - C, P. 229

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1975 Steigner, William D. U.S. Geological Survey
Updater 01-SEP-1976 Siefken, Robert R. 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