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  3. Mineral Resource Data System (MRDS)

West Ophir Mine

Past Producer in Elmore county in Idaho, 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. 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. 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 10105570
MRDS ID W007841
MAS/MILS ID 0160390025
Record type Site
Current site name West Ophir Mine

Geographic coordinates

Geographic coordinates: -115.27704, 43.70568 (WGS84)
Elevation 1829
Relative position 1 1/2 MI NE OF ROCKY BAR

Site location context

Political divisions (FIPS codes)

Elmore(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rocky Bar(quadrangle 1:24,000 scale)

Idaho City(quadrangle 1:100,000 scale)

Hailey(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork Boise(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 Elmore

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 004N 010E 04 SESW Idaho

Comments on the location information

  • Near The Head Of Blake'S Gulch

Commodities

Commodity Importance
Gold Primary
Silver Tertiary

Materials information

Materials Type of material
Quartz Gangue

Host and associated rocks

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

Nearby scientific data

(1) -115.27704, 43.70568
ListMap

Economic information

Ore body information

  • General form TABULAR, LENTICULAR
    Strike N 85 DEG W
    Dip 45 DEG N
    Width 4.57M

Controls for ore emplacement

  • Fracture Zones

Economic information about the deposit and operations

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

Mining district

District name Rocky Bar District

Land status

Ownership category National Forest
Area name Boise National Forest

Ownership information

  • Type Owner
    Owner Apex Gold Mining Co.

Comments on the production information

  • One Car Of Ore Shipped In 1926.

Workings at the site

  • Type of workings Surface/Underground
    Length 91.44M

Comments on the workings information

  • Several Short Tunnels And A Number Of Open Cuts

Reference information

Bibliographic references

  • Deposit

    Anderson, A. L., 1943, Geology Of The Gold - Bearing Lodes Of Rocky Bar. Dist., Elmore Co., Idaho: Idaho Bureau Of Mines & Geol. Pam. 65, P. 3

  • Deposit

    1943 Geolmap Idaho Bureau Of Mines & Geol. Pam. 6

  • Production

    Anderson, A. L., 1943, Idaho Bureau Of Mines & Geol. Pam. 65, P. 32

General comments

Subject category Comment text
Deposit Vein Is West Extension Of Ophir Vein.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1975 Steigner, William D. U.S. Geological Survey
Updater 01-SEP-1976 Siefken, Robert R. U.S. Geological Survey
Reporter 13-MAR-1995 Western Field Operations Center (WFOC) U.S. Bureau of Mines

Beyond USGS

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

Maps centered on this site