Boulder Group Mine

The Boulder Group Mine is a gold and silver mine located in Boise county, Idaho at an elevation of 3,999 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

Name: Boulder Group Mine  

State:  Idaho

County:  Boise

Elevation: 3,999 Feet (1,219 Meters)

Primary Mineral: Gold, Silver

Lat, Long: 43.91833, -115.78694

Map: View on Google Maps

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.


Satelite image of the Boulder Group Mine

Boulder Group Mine MRDS details

Site Name

Primary: Boulder Group Mine


Commodity

Primary: Gold
Primary: Silver


Location

State: Idaho
County: Boise
District: Idaho City 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: Boise National Forest


Holdings

Not available


Workings

Type: Underground


Ownership

Not available


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
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: LINEAR


Structure

Not available


Alterations

Alteration Type: L
Alteration Text: Oxidation; Fe And Mn Stains


Rocks

Name: Granite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Miocene

Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous


Analytical Data

Analytical Data: SAMPLE FROM 1 VEIN ASSAYED 0.55 OZ AU/TON AND 8.3 OZ AG/TON. (WESTERN END OF PROPERTY)


Materials

Gangue: Quartz


Comments

Comment (Geology): THE APLITE DIKES HAVE ABOUT THE SAME ORIENTATION AS THE VEINS

Comment (Location): AT THE END OF THE ROAD ON ELK CRK.

Comment (Commodity): ELEVEN QUARTZ CLAIMS AND ONE MILL SITE

Comment (Production): DEPOSITS AT EAST END OF PROPERTY PRINCIPALLY FREE - MILLING AU. WITH SOME AG.

Comment (Development): THOUGHT TO BE THE WESTWARD CONTINUATION OF THE WASHINGTON AND SUBROSA VEINS


References

Reference (Deposit): BALLARD, SAMUEL M., 1924, GEOLOGY AND GOLD RESOURCES OF BOISE BASIN,BOISE CO., IDAHO: IDAHO BUREAU OF MINES & GEOL. BULL. 9, P. 97.

Reference (Deposit): ANDERSON, A.L., 1947, GEOLOGY AND ORE DEPOSITS OF BOISE BASIN, IDAHO: USGS BULL. 944-C, P. 236-237.

Reference (Deposit): 1924 GEOLMAP IDAHO BUR MINES, BULL. 9

Reference (Deposit): 1947 GEOLMAP ANDERSON, A.L., BULL. 944-C

Reference (Production): BALLARD, 1924, IDAHO BUREAU OF MINES BULL. NO. 9, P. 98


Idaho Gold

Where to Find Gold in Idaho

"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 at Where to Find Gold in Idaho.