The Twin Sister Mine is a gold mine located in Boise county, Idaho at an elevation of 4,800 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
Elevation: 4,800 Feet (1,463 Meters)
Commodity: Gold
Lat, Long: 43.9108, -115.88280
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.
Twin Sister Mine MRDS details
Site Name
Primary: Twin Sister Mine
Commodity
Primary: Gold
Tertiary: Antimony
Tertiary: Lead
Tertiary: Zinc
Location
State: Idaho
County: Boise
District: Idaho City
Land Status
Land ownership: BLM Administrative Area
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.
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past 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
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Fe Stains, Scorodite
Rocks
Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Sphalerite
Ore: Galena
Gangue: Quartz
Gangue: Pyrite
Comments
Comment (Location): NEAR THE HEAD OF MILL CR.
Comment (Production): $50,000 OF AU (?) ORE IN THE EARLY DAYS PLUS 1,000 TONS ORE IN 1934.
References
Reference (Production): ANDERSON, A. L. 1947. USGS BULL. 944 - C, P. 242.
Reference (Deposit): 1947 GEOLMAP ANDERSON, A. L., BULL. 944 -
Reference (Deposit): ANDERSON, ALFRED L., 1947, GEOLOGY AND ORE DEPOSITS OF BOISE BASIN, IDAHO, U. S. GEOL. SUR. BULL. 944 - C, P. 242
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.
