1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Porterfield Prospect

Occurrence in Lemhi county in Idaho, United States with commodity Copper
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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. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. Reporter information

Geologic information

Identification information

Deposit ID 10070434
MRDS ID W013370
MAS/MILS ID 0160590196
Record type Site
Current site name Porterfield Prospect

Geographic coordinates

Geographic coordinates: -113.82981, 45.03569 (WGS84)
Elevation 2073
Relative position 10.25 MI. SSW OF SALMON.

Site location context

Political divisions (FIPS codes)

Lemhi(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sal Mountain(quadrangle 1:24,000 scale)

Salmon(quadrangle 1:100,000 scale)

Dillon(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lemhi(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 020N 022E 26,27 Idaho

Comments on the location information

  • Se/4 Of The Ne/4 Of Sect. 27

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Malachite Ore
Limonite Gangue
Quartz Gangue
Quartzite Unknown

Alteration

  • (Local) Brecciation, Epidote

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic)
    Rock unit name Challis Volcanics-Vitrophyre;Post Challis Intrusives-Dacite Porphyry
    Rock description Challis Volcanics-Vitrophyre;Post Challis Intrusives-Dacite Porphyry
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Rock unit name Yellowjacket Formation
    Rock description Yellowjacket

Nearby scientific data

(1) -113.82981, 45.03569
ListMap

Economic information

Geologic structures

Type of structure Local
Structure name Fault

Ore body information

  • Length 15.24M

Controls for ore emplacement

  • Fault

Comments on the geologic information

  • Original ore control entry:
    Fault Striking N 65 Deg W, Dipping 55 Deg S.
  • Original Structures entry:
    Local - Fault In Last 50 Ft Of Adit Strikes N 65 Deg W, Dips 55 Deg Sw; Quartzite Strikes N 75 Deg W, Dips 65 Deg W

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Mcdevitt District

Land status

Ownership category National Forest
Area name Salmon National Forest

Ownership information

  • Type Owner
    Owner J. Porterfield
    First year 1925

Workings at the site

  • Type of workings Underground
    Length 60.96M

Reference information

Bibliographic references

  • Deposit

    Anderson, A. L., 1956, Geology And Mineral Resources Of The Salmon Quadrangle, Lemhi County, Idaho: Idaho Bureau Of Mines And Geology Pamphlet 106, 102 P.

  • Deposit

    Ross, C. P., 1925, The Copper Deposits Near Salmon, Idaho: USGS Bulletin 774, P. 37.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1974 Miller, Pat J. U.S. Geological Survey
Updater 01-APR-1980 Loen, Jeffrey S. (Pearson, Robert C.) U.S. Geological Survey
Reporter 14-NOV-1983 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