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

Unnamed (south of Tidal Inlet)

Occurrence in Alaska, United States with commodities Copper, Cobalt, Nickel
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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 10002271
MRDS ID A013174
Record type Site
Current site name Unnamed (south of Tidal Inlet)

Geographic coordinates

Geographic coordinates: -136.34821, 58.79279 (WGS84)
Relative position The site is near tidewater about 2.55 miles south of the mouth of Tidal Inlet. The location of the site is accurate wihtin abount 0.1 mile. It is location number 41 of MacKevett and others (1971) and location number 87 of Kimball and others (1978).

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mount Fairweather D-2 SE(quadrangle 1:24,000 scale)

Juneau NW(quadrangle 1:100,000 scale)

Mount Fairweather(quadrangle 1:250,000 scale)

Federal lands

Glacier Bay 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
Copper Primary
Cobalt Critical Secondary
Nickel Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Pyrrhotite Ore
Calcite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble

Nearby scientific data

(1) -136.34821, 58.79279
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The site is mainly underlain by marble and argillite and graywacke of Silurian and Devonian age that are intruded by hornblende diorite of Cretaceous age (Brew and others, 1978). At the site, thin quartz veins in marble contain pyrite, pyrrhotite, and chalcopyrite. A representative sample collected by MacKevett and others (1971, p. 50) contained 1000 ppm copper and 300 ppm each of cobalt and nickel.
  • Age = Probably Cretaceous.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Juneau

Comments on the workings information

  • Workings / Exploration = Representative surface sample of veins contained 1000 ppm copper, and 300 ppm each of cobalt and nickel (MacKevett and others, 1971). Trace of gold, no silver detected. Wright and Wright (1937) reported claims staked for copper at or near this locality.

Reference information

Bibliographic references

  • Deposit

    Wright, F.E. and Wright, C.W., 1937, The Glacier Bay National Monument in southeastern Alaska, its glaciers and geology: U.S. Geological Survey manuscript report, 224 p.

  • Deposit

    MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1971, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Professional Paper 632, 90 p., 12 plates, scale 1:250,000.

  • Deposit

    Brew, D.A., Johnson, B.R., Grybeck, D., Griscom, A., Barnes, D.F., Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources of the Glacier Bay National Monument Wilderness Study Area, Alaska: U.S. Geological Survey Open-File Report 78-494, 670 p.

  • Deposit

    Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources, in Brew, D. A., and others, Mineral resources of the Glacier Bay National Monument wilderness study area, Alaska: U.S. Geological Survey Open-File Report 78-494, p. C1-C375.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Mount Fairweather quadrangle, AK: U.S. Geological Survey Miscellaneous Field Study Map MF-436, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = MacKevett and others, 1971

General comments

Subject category Comment text
Deposit Model Name = Contact deposit in marble near quartz diorite. Sulfide veins in marble.
Deposit Other Comments = Wright and Wright (1937) report claim activity (copper) at or near this location.? the site is in Glacier Bay National Park and Preserve.

Reporter information

Type Date Name Affiliation Comment
Reporter 03-JAN-99 Hawley, C.C. Hawley Resource Group

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.