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Unnamed (near Hill 5605 above Alsek River and within about 2 miles of the U.S.-Canada border)

Occurrence in Alaska, United States with commodities Gold, 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. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10308483
Record type Site
Current site name Unnamed (near Hill 5605 above Alsek River and within about 2 miles of the U.S.-Canada border)

Geographic coordinates

Geographic coordinates: -138.1512, 59.48871 (WGS84)
Relative position Occurrence is at an elevation of about 3700 feet about 0.5 mile southeast of hill 5605 (section 17, T. 28 S., R. 43 E., of the Copper River meridian). It is 3 miles from the Alsek River and about 2 miles southwest of the U.S.- Canadian Border. Accuracy is within 0.15 mile. The occurrence is location number 2 of Cobb (1972).

Site location context

Political divisions (FIPS codes)

Yakutat(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Yakutat B-1(quadrangle 1:63,360 scale)

Yakutat SE(quadrangle 1:100,000 scale)

Yakutat(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Dezadeash River(hydrologic unit)

Gulf of Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tongass National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Copper Primary

Alteration

  • (Local) The occurrence is a hydrothermally altered zone, of unspecified type, in an intrusion.

Nearby scientific data

(1) -138.1512, 59.48871
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The area is mainly underlain by schists of uncertain age, possibly Mesozoic or older, but also possibly metamorphosed Yakutat Group rocks of Jurassic and Cretaceous age. These rocks are cut by a granitic rock of Cretaceous or Tertiary age, part of an extensive pluton mostly exposed south of the large unnamed glacier south of the occurrence (MacKevett and Plafker, 1970). The mineral occurrence constitutes a hydrothermally altered zone about 100 feet wide in quartz diorite. A representative sample of the zone contained 0.08 ppm gold and 200 ppm copper.
  • Age = Cretaceous or younger

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Yakutat

Comments on the workings information

  • Workings / Exploration = Surface exposures only. MacKevett and Plafker (1970, table 1) reported 0.08 ppm gold and 200 ppm copper in sample 68APr85E. The occurrence was cited in Cobb (1972; 1979).

Reference information

Bibliographic references

  • Deposit

    MacKevett, E.M., Jr., and Plafker, G., 1970, Geochemical and geophysical reconnaissance of parts of the Yakutat and Mount St. Elias quadrangles, Alaska: U.S. Geological Survey Bulletin 1312-L, 12 p.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bering Glacier, Icy Bay, Middleton Island, and Yakutat quadrangles, Alaska: U.S. Geological Survey Open-File Report 79-1246, 41 p.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Yakutat quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-408, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = MacKevett and Plafker, 1970.

General comments

Subject category Comment text
Deposit Model Name = Shear zone
Deposit Other Comments = Proposed as an occurrence because of the width of the anomalous zone (100 feet) suggesting more detailed sampling could be warranted. The site is in Tongass National Forest and appears to be open for mineral location.

Reporter information

Type Date Name Affiliation Comment
Reporter 15-APR-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.