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  3. Mineral Resource Data System (MRDS)

Hallmadge Prospect

Occurrence in Idaho county in Idaho, United States with commodities Mica, Feldspar
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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. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10078304
MRDS ID W026574
MAS/MILS ID 0160490358
Record type Site
Current site name Hallmadge Prospect
Alternate or previous names Mica Lode, Holmadge Mica Deposit

Geographic coordinates

Geographic coordinates: -116.16071, 45.46543 (WGS84)
Elevation 1189
Relative position 8 MI ENE OF RIGGINS

Site location context

Political divisions (FIPS codes)

Idaho(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Riggins Hot Springs(quadrangle 1:24,000 scale)

Riggins(quadrangle 1:100,000 scale)

Grangeville(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Salmon(hydrologic unit)

Salmon(hydrologic accounting unit)

Lower Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Nez Perce-Clearwater 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 Idaho

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 025N 002E 36 Idaho

Comments on the location information

  • On W Side Of Upper Switchback Of Allison Cr Road

Commodities

Commodity Importance
Mica Primary
Feldspar Tertiary

Materials information

Materials Type of material
Mica Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Rock unit name Pegmatite
    Rock description Pegmatite
  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite

Nearby scientific data

(1) -116.16071, 45.46543
ListMap

Economic information

Ore body information

  • Strike N 40 DEG W
    Dip 27 DEG N
    Width 0.91M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic
Deposit size Small
Significant No

Mining district

District name Riggins Area

Land status

Ownership category National Forest
Area name Nez Perce National Forest

Ownership information

  • Type Operator
    Owner Hallmadge, Gus

Workings at the site

  • Type of workings Surface/Underground
    Length 12.19M

Comments on the workings information

  • 1 Tunnel

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit Mica Books 16 By 16 Inches

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1974 Miller, Pat J. U.S. Geological Survey
Reporter 22-MAY-1986 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