Boulder Mines

The Boulder Mines is a copper, lead, silver, and gold mine located in Blaine county, Idaho at an elevation of 8,999 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Boulder Mines
Secondary: Golden Glow and Boulder Consolidated

Commodity

Primary: Copper
Primary: Lead
Primary: Silver
Primary: Gold
Secondary: Zinc

Location

State: Idaho
County: Blaine
District: North Fork Of Wood River District

Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: Sawtooth National Forest

Holdings

Not available

Workings

Type: Underground

Ownership

Owner Name: George Castel

Production

Year: 1911
Material type: ORE
Description: Ap_Grade: ^43. % Pb - 58. % Pb, 1. % Cu - 2. % Cu, .32 Oz/Ton Au - .63 Oz/Ton Au, 56 Oz/Ton Ag - 92 Oz/Ton Ag

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Sawtooth Mountains

Mineral Deposit Model

Not available

Orebody

Form: LENSES, PODS, STRINGERS, BLEBS

Structure

Not available

Alterations

Not available

Rocks

Name: Andesite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene

Name: Andesite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Permian

Name: Andesite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Analytical Data

Analytical Data: SAMPLES FROM CACHE SHAFT: .34 OZ. AU/TON
Analytical Data: 21.2% PB. ONE ORE SHOOT CONTAINED VALUES FROM 30 - 70% PB.
Analytical Data: 61.9 OZ. AG/TON

Materials

Ore: Galena
Ore: Chalcopyrite
Ore: Bornite
Ore: Tetrahedrite
Ore: Malachite
Ore: Sphalerite
Gangue: Limonite
Gangue: Calcite
Gangue: Quartz
Gangue: Hematite
Gangue: Pyrite
Gangue: Siderite

Comments

Comment (Development): 23 CLAIMS IN 1914.

Comment (Workings): 20 CLAIMS WITH EXTENSIVE WORKINGS, SHAFTS, ADITS, ON SEVERAL SHEAR ZONES.

References

Reference (Deposit): TSCHANZ, C. M., AND OTHERS, 1974, MINERAL RESOURCES OF THE EASTERN PART OF THE SAWTOOTH NATIONAL RECREATION AREA, CUSTER AND BLAINE COUNTIES, IDAHO: USGS OPEN - FILE REPT., 648 P.

Reference (Deposit): USBM, 1975, ACTIVITY OF IDAHO MINING PROPERTIES, 1974, USBM, BOISE, IDAHO, 61 P.

Reference (Deposit): UMPLEBY, J. B., 1914, ORE DEPOSITS IN THE SAWTOOTH QUADRANGLE, BLAINE AND CUSTER COUNTIES, IDAHO: USGS BULL. 580 - K, P. 221 - 249.

Reference (Production): TSCHANZ, C. M., AND OTHERS, 1974, USGS OPEN - FILE REPT.

Reference (Deposit): BELL, R. N., 1913, FOURTEENTH ANNUAL REPORT OF THE MINING INDUSTRY OF IDAHO FOR THE YEAR 1912.

Idaho Gold

"Where to Find Gold in Idaho" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Idaho. Read more: Where to Find Gold in Idaho.