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  3. Mineral Resource Data System (MRDS)

Dewey Claims

Occurrence in Lemhi county in Idaho, United States with commodities Cobalt, Copper, Nickel
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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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10070514
MRDS ID W013478
MAS/MILS ID 0160590062
Record type Site
Current site name Dewey Claims
Included sites Blackbird Mine

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -114.33336, 45.13302 (WGS84)
Elevation 1829
Location accuracy 100(meters)
Relative position 20 MI. W. OF SALMON, IDAHO

Site location context

Political divisions (FIPS codes)

Lemhi(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gant Mountain(quadrangle 1:24,000 scale)

Bighorn Crags(quadrangle 1:100,000 scale)

Elk City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Salmon-Panther(hydrologic unit)

Salmon(hydrologic accounting unit)

Lower Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Salmon-Challis 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 Lemhi

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 021N 018E 22,23 Idaho

Comments on the location information

  • UPPER LITTLE DEER CREEK

Commodities

Commodity Importance
Cobalt Critical Primary
Copper Primary
Nickel Critical Tertiary

Materials information

Materials Type of material
Magnetite Gangue

Alteration

  • (Local) Gossan

Analytical data

Result .8 % NI

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
    Rock unit name Gabbro
    Rock description Gabbro
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Belt Supergroup
    Rock description Belt Supergroup-Schist

Nearby scientific data

Ore Body (1) -114.33336, 45.13302
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Strong N-S Shearing

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Blackbird District

Land status

Ownership category National Forest
Area name Salmon National Forest

Ownership information

  • Type Owner
    Owner Hanna Mining Co.

Comments on development

  • DEWEY CLAIM NOW INCLUDED IN BLACKBIRD MINE, SEE NO. 363

Reference information

Bibliographic references

  • Deposit

    REED, G.L., AND HERDLICK, J.A., 1947, BLACKBIRD COBALT DEPOSITS, LEMHI COUNTY, IDAHO: USBM REPT. INV. 4012, 14 P.

  • Deposit

    BALDWIN, J.A., OCTOBER 8, 1976, PERSONAL COMMUNICATION.

  • Deposit

    1947 DIREXPL USBM REPT. INV. 401

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1975 Ortman, Dale; Miller, Pat U.S. Geological Survey
Updater 21-JUL-2009 Causey, J. Douglas U.S. Geological Survey Consolidated data from Deposit ID: 10145045 and then deleted that record

Beyond USGS

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

Maps centered on this site