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

Unnamed

Occurrence in Alaska, United States with commodities Gold, Tungsten
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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. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10000910
MRDS ID A011568
Record type Site
Current site name Unnamed

Geographic coordinates

Geographic coordinates: -152.69672, 62.48256 (WGS84)
Relative position Reed and others (1978, locality 16) show this occurrence 19.5 miles east-southeast from Shellabarger Pass, in the southwest quarter of Section 30, T. 28 N., R. 18 W., of the Seward Meridian. Located at about 4200 feet elevation on the east side of the Shadows Glacier the occurrence is within the 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 B-6(quadrangle 1:63,360 scale)

Talkeetna SW(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
Tungsten Critical Primary

Materials information

Materials Type of material
Gold Ore
Scheelite Ore
Wolframite Ore
Quartz Gangue
Tourmaline Gangue

Alteration

  • (Local) Development of calc-silicate (skarn) mineral assemblage in country rocks (Reed and others, 1978).

Mineral occurrence model information

Model code 46
USGS model code 15a
Deposit model name W veins

Host and associated rocks

  • Host or associated Host
    Rock type
    Stratigraphic age (youngest) Early Eocene
    Chronological age 54.25
    Type of media Biotite-muscovite

Nearby scientific data

(1) DCd
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Mesozoic marine sedimentary rocks (KJs) exhibit calc-silicate (skarn) alteration and are cut by a quartz- tourmaline-wolframite-scheelite vein 10 to 20 centimeters wide; the vein contains trace gold (Reed and others, 1978). The occurrence is within the thermal aureole of the Tertiary Cathedral pluton (Tmc), a biotite- muscovite granite that is part of the 52.3 to 56.2 m.y. McKinley sequence (Reed and Nelson, 1980).
  • Age = Tertiary; mineralization is interpreted to be linked to the Tertiary Cathedral pluton (Tmc), a biotite- muscovite granite that is part of the 52.3 to 56.2 m.y. McKinley sequence (Reed and Lanphere, 1972; Reed and Nelson, 1980).
  • Age = Chron age is for McKinley Sequence.

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, prospecting, stream silt, and rock sampling are all that have been done here. The quartz-tourmaline-wolframite-scheelite vein, 10 to 20 centimeters wide, contains trace gold (Reed and others, 1978).

Reference information

Bibliographic references

  • Deposit

    Reed, B.L., and Lanphere, M.A., 1972, Generalized geologic map of the Alaska-Aleutian range batholith showing potassium-argon ages of the plutonic rocks: U.S. Geological Survey Miscellaneous Field Studies Map MF-372, 2 sheets, scale 1:1,000,000.

  • Deposit

    C.C. Hawley and Associates, Inc., 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska: U.S. Bureau of Mines Open-File Report 24-78, 275 p., 7 plates.

  • 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

    Cobb, E.H., and Reed, B.L., 1980, Summaries of data and lists of reference to metallic and selected nonmetallic mineral deposits in the Talkeetna quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-884, 106 p.

  • 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 Model Name = W veins (Cox and Singer, 1986; model 15a).
Deposit Other Comments = This occurrence is within the 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.