Rock Flat Placer

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

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: 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.