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

Unnamed (near Mt. Foraker)

Occurrence in Alaska, United States with commodities Silver, Gold, Copper, Molybdenum, Arsenic
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10000888
MRDS ID A011542
Record type Site
Current site name Unnamed (near Mt. Foraker)

Geographic coordinates

Geographic coordinates: -151.2909, 62.93648 (WGS84)
Relative position Reed and others (1978, locality 33) show this occurrence on southeast flank of Mt. Foraker, about 3.2 miles southeast from the summit, in the northwest quarter of Section 24, T. 33 N., R. 11 W., of the Seward Meridian within Denali National Park and Preserve.

Site location context

Political divisions (FIPS codes)

Denali(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Talkeetna D-3(quadrangle 1:63,360 scale)

Talkeetna NE(quadrangle 1:100,000 scale)

Talkeetna C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Yentna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Denali National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Primary
Molybdenum Primary
Arsenic Critical Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Gold Ore
Pyrite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Foraker Granodiorite
    Rock description Foraker Granodiorite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Argillite

Nearby scientific data

(1) -151.2909, 62.93648
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The area is underlain by Paleozoic argillite (Pzus) and Middle to Upper Devonian limestone (Dl) that are cut by the middle Tertiary (38 m.y.) granodiorite of the Mt. Foraker pluton (Tf) (Reed and Nelson, 1980). Disseminated pyrite, chalcopyrite and other sulfides occur in sheared sedimentary rocks. Nearby float contains massive arsenopyrite with up to 0.45 oz/ton gold (Reed and others, 1978).
  • Age = Middle Tertiary; mineralization is interpreted to be related to the Mt. Foraker pluton which is described as a 38 m.y. old pluton Reed and Nelson (1980).

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Yentna

Comments on the workings information

  • Workings / Exploration = Reconnaissance mapping, stream silt and rock sampling (Reed and others, 1978; Reed and Nelson, 1980) are all that have been described here. Nearby float contains massive arsenopyrite with up to 0.45 oz/ton gold (Reed and others, 1978).

Reference information

Bibliographic references

  • Deposit

    Reed, B.L., Nelson, S.W., Curtin, G.C., and Singer, D.A., 1978, Mineral resources map of the Talkeetna Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-870-D, 1 sheet, scale 1:250,000.

  • Deposit

    Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle: U.S. Geological Survey Miscellaneous Investigations Map I-1174, scale 1:250,000.

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

Comments on the references

  • Primary Reference = Reed and others, 1978

General comments

Subject category Comment text
Deposit Other Comments = This site is located within Denali National Park and Preserve.

Reporter information

Type Date Name Affiliation Comment
Reporter 10-AUG-1998 Madelyn A. Millholland Millholland & Associates

Beyond USGS

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

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.