The Rock Flat Placer is a gold mine located in Adams county, Idaho at an elevation of 5,098 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: 5,098 Feet (1,554 Meters)
Commodity: Gold
Lat, Long: 44.9367, -116.16780
Map: View on Google Maps
Rock Flat Placer MRDS details
Site Name
Primary: Rock Flat Placer
Secondary: Ruby
Secondary: Boise
Commodity
Primary: Gold
Secondary: Corundum
Tertiary: Gemstone
Tertiary: REE
Tertiary: Garnet
Tertiary: Zirconium
Tertiary: Titanium
Location
State: Idaho
County: Adams
District: Meadows District
Land Status
Land ownership: Private
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
Type: Surface/Underground
Ownership
Owner Name: Frank E. Johnesse ( 1913 )
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Placer
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Name: Granite
Role: Associated
Age Type: Host Rock
Age Young: Holocene
Analytical Data
Analytical Data: FISSURE ZONE SAMPLED $2.80 - $16.80 AU/TON
Analytical Data: 3 ACRES PLACERED YIELDED $0.60 AU/CY
Analytical Data: 1000 YD GRAVEL TREATED WITH RESULT $0.15 AU/CY, 90 LB BLACK SAND/CY
Materials
Ore: Corundum
Ore: Garnet
Ore: Monazite
Ore: Ilmenite
Ore: Magnetite
Ore: Chromite
Ore: Platinum
Ore: Zircon
Ore: Gold
Comments
Comment (Location): On High Plateau Divide That Separates The Little Salmon And N Payette Rivers, At Head Of Little Goose Creek
Comment (Development): Claims Covered 600 Acres ( 1904 )
Comment (Deposit): Width And Dip Above For Fissure Zone
Comment (Workings): Drainage Tunnel, Small Pits And Sluicing Operations
Comment (Geology): Corundum Believed To Occur In Basaltic Dike Which Has Altered Almost To Clay And Is Located Between Schist And Granite
References
Reference (Deposit): Fryklund, V. C., Jr., 1951 , Note On The Occurrence Of Corundum In Idaho: American Mineralogist, V. 36 , No. 9 - 10 , P. 776 - 778 .
Reference (Deposit): Bell, R. N., 1907 , Sapphires In Idaho: The Mining World, V. 26 , P. 449 .
Reference (Deposit): Bell, R. N., 1907 , Eighth Annual Report Of The Mining Industry Of Idaho For The Year 1906 , 172 P.
Reference (Deposit): Bell, R. N., 1913 , Fourteenth Annual Report Of The Mining Industry Of Idaho For The Year 1912 , 190 P.
Reference (Deposit): Bell, R. N., 1914 , Fifteenth Annual Report Of The Mining Industry Of Idaho For The Year 1913 , 225 P.
Reference (Deposit): Bell, R. N., 1905 , Report Of The Mining Districts Of Idaho For The Year 1904 , 139 P.
Reference (Deposit): Shannon, E. V., 1926 , The Minerals Of Idaho: U.S. National Museum Bulletin 131 , P. 46 .
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.
