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Rock Flat Placer

Past Producer in Adams county in Idaho, United States with commodities Gold, Corundum, Gemstone, REE, Garnet, Zirconium, Titanium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10079112
MRDS ID W028018
MAS/MILS ID 0160030061
Record type Site
Current site name Rock Flat Placer
Alternate or previous names Ruby, Boise

Geographic coordinates

Geographic coordinates: -116.16878, 44.93657 (WGS84)
Elevation 1554
Relative position 3 MI NW OF MCCALL

Site location context

Political divisions (FIPS codes)

Adams(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Meadows(quadrangle 1:24,000 scale)

McCall(quadrangle 1:100,000 scale)

Baker City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Little Salmon(hydrologic unit)

Salmon(hydrologic accounting unit)

Lower Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Payette National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Idaho Adams

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 019N 002E 35 SESE Idaho
Boise 018N 002E 01,02 Idaho

Comments on the location information

  • On High Plateau Divide That Separates The Little Salmon And N Payette Rivers, At Head Of Little Goose Creek

Commodities

Commodity Importance
Gold Primary
Corundum Secondary
Gemstone Tertiary
REE Critical Tertiary
Garnet Tertiary
Zirconium Critical Tertiary
Titanium Critical Tertiary

Materials information

Materials Type of material
Chromite Ore
Corundum Ore
Garnet Ore
Gold Ore
Ilmenite Ore
Magnetite Ore
Monazite Ore
Platinum Ore
Zircon Ore

Analytical data

Result 1000 YD GRAVEL TREATED WITH RESULT $0.15 AU/CY, 90 LB BLACK SAND/CY
Result 3 ACRES PLACERED YIELDED $0.60 AU/CY
Result FISSURE ZONE SAMPLED $2.80 - $16.80 AU/TON

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Granite;Dike-Basaltic Tuff
    Rock description Granite;Dike-Basaltic Tuff
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Holocene
  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel
    Rock unit name Gneiss, Schist;Alluvium-Gravel
    Rock description Gneiss, Schist;Alluvium-Gravel
  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -116.16878, 44.93657
ListMap

Economic information

Ore body information

  • Dip 45 DEG
    Width 21.64M

Controls for ore emplacement

  • Vein In Fissure Zone Between Granite And Schist (Corundum Locus)

Comments on the geologic information

  • Corundum Believed To Occur In Basaltic Dike Which Has Altered Almost To Clay And Is Located Between Schist And Granite

Economic information about the deposit and operations

Operation type Placer
Development status Past Producer
Commodity type Both
Deposit size Small
Significant No

Mining district

District name Meadows District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Frank E. Johnesse ( 1913 )

Workings at the site

  • Type of workings Surface/Underground
    Length 243.84M
    Overall depth 24.38M

Comments on the workings information

  • Drainage Tunnel, Small Pits And Sluicing Operations

Comments on development

  • Claims Covered 600 Acres ( 1904 )

Reference information

Bibliographic references

  • Deposit

    Fryklund, V. C., Jr., 1951 , Note On The Occurrence Of Corundum In Idaho: American Mineralogist, V. 36 , No. 9 - 10 , P. 776 - 778 .

  • Deposit

    Bell, R. N., 1907 , Sapphires In Idaho: The Mining World, V. 26 , P. 449 .

  • Deposit

    Bell, R. N., 1907 , Eighth Annual Report Of The Mining Industry Of Idaho For The Year 1906 , 172 P.

  • Deposit

    Bell, R. N., 1913 , Fourteenth Annual Report Of The Mining Industry Of Idaho For The Year 1912 , 190 P.

  • Deposit

    Bell, R. N., 1914 , Fifteenth Annual Report Of The Mining Industry Of Idaho For The Year 1913 , 225 P.

  • Deposit

    Bell, R. N., 1905 , Report Of The Mining Districts Of Idaho For The Year 1904 , 139 P.

  • Deposit

    Shannon, E. V., 1926 , The Minerals Of Idaho: U.S. National Museum Bulletin 131 , P. 46 .

General comments

Subject category Comment text
Deposit Width And Dip Above For Fissure Zone

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1978 Miller, Pat J. U.S. Geological Survey
Reporter 30-JAN-1995 Western Field Operations Center (WFOC) U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site