1. Mineral Resources
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  3. Mineral Resource Data System (MRDS)

Unnamed

Occurrence in Alaska, 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. Commodities
  6. Alteration
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Links to other databases
  11. Bibliographic references
  12. Reporter information

Geologic information

Identification information

Deposit ID 10308749
Record type Site
Current site name Unnamed

Geographic coordinates

Geographic coordinates: -152.69083, 62.52051 (WGS84)
Relative position Reed and others (1978, locality 15) show this occurrence at about 2800 to 3000 feet, approximately three miles east of Shellabarger Pass in the northwest quarter of Section 18, T. 28 N., R. 18 W., of the Seward Meridian within 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-6(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
Copper Primary

Comments on the commodity information

  • Ore Material = Unidentified copper-bearing minerals

Alteration

  • The Shellabarger stock is described as an altered gabbro by Reed and others (1978) and by Reed and Nelson (1980). Alteration mineralogy is not specified.

Nearby scientific data

(1) -152.69083, 62.52051
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Reed and others (1978) report three samples that averaged 0.1% copper from the Shellabarger stock, an altered biotite-pyroxene gabbro. This stock is mapped as one of the composite plutons (Tcp) by Reed and Nelson (1980). It lies northwest of the main belt of composite plutons and intrudes undivided Paleozoic sedimentary rocks.
  • Age = Late Cretaceous/early Tertiary; mineralization is interpreted to be linked to the Shellabarger 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. Reed and others (1978) report three samples that averaged 0.1% copper from the Shellabarger stock, an altered biotite-pyroxene gabbro.

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.

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.