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

Unnamed

Occurrence in Alaska, United States with commodities Gold, Copper, Tungsten
Map
XML
JSON
KML
C
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Nearby scientific data
  7. Economic information about the deposit and operations
  8. Mining district
  9. Links to other databases
  10. Bibliographic references
  11. Reporter information

Geologic information

Identification information

Deposit ID 10308748
Record type Site
Current site name Unnamed

Geographic coordinates

Geographic coordinates: -152.04582, 62.52152 (WGS84)
Relative position Reed and others (1978, locality 22) locate this occurrence at approximately 3800 feet in a tributary to the east fork of the Yentna River in the northwest quarter of Section 15, T. 28 N., R. 15 W., of the Seward Meridian in Denali National Park and Preserve.

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Talkeetna C-5(quadrangle 1:63,360 scale)

Talkeetna NW(quadrangle 1:100,000 scale)

Talkeetna(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)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Copper Primary
Tungsten Critical Primary

Comments on the commodity information

  • Ore Material = Unidentified sulfides
  • Ore Material = oxides

Nearby scientific data

(1) g
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Reed and others (1978) describe disseminated sulfide minerals (unidentified) in felsite dikes of the East Fork Yentna stock, a medium-grained, pyroxene-bearing biotite granite, that is one of the composite plutons (Tcp) of Reed and Nelson (1980). Maximum values of 2 ppb gold, 1 ppb palladium, and 5 ppb platinum from the East Fork stock are reported by Foley and others (1997).
  • Age = Late Cretaceous/early Tertiary; mineralization is interpreted to be related to the East Fork Yentna stock, one of the composite plutons mapped by 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, pan concentrate and rock sampling by the U.S. Geological Survey (Reed and others, 1978; Reed and Nelson, 1980) are all that have been described here. Maximum values of 2 ppb gold, 1 ppb palladium, and 5 ppb platinum from the East Fork stock are reported by Foley and others (1997).

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

    Foley, J.Y., Light, T.D., Nelson, S.W., and Harris, R.A., 1997, Mineral occurrences associated with mafic-ultramafic and related alkaline complexes in Alaska: Economic Geology, Monograph 9, p. 396-449.

Comments on the references

  • Primary Reference = Reed and others, 1978

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.