Unnamed (along the Haines Highway)

Occurrence in Alaska, United States with commodities Silver, Gold, Zinc, Copper

Geologic information

Identification information

Deposit ID 10308245
Record type Site
Current site name Unnamed (along the Haines Highway)

Geographic coordinates

Geographic coordinates: -135.76211, 59.34975 (WGS84)
Relative position This occurrence is along the Haines Highway between mileposts 15 and 16. It is about 5.8 miles southeast of the village of Klukwan. It is shown as sample sites 790 and 791 on sheet 2 of Gilbert and others (1991).
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Zinc Primary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Malachite Ore
Pyrite Ore
Sphalerite Ore
Quartz Gangue

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -135.76211, 59.34975

Comments on the geologic information

  • Geologic Description = Gilbert and others (1991) collected several samples of quartz veins in metabasalt at this site that contained chalcopyrite, pyrite, malachite, and sphalerite. The samples contained up to 0.686 ppm gold, 2.4 ppm silver, 3,990 ppm copper, and 1.85% zinc. According to MacKevett and others (1974), the metabasalts exhibit a gradational contact with the Klukwan ultramafic complex and they considered both to be of Cretaceous age. Later workers (Plafker, Hudson and Silberling, 1979; Plafker and Hudson, 1980) assign a Late Triassic age to the metabasalts based on fossil evidence from the Chilkat Peninsula. Gilbert and others (1987) accept the Late Triassic age for the metabasalt and comment that it is juxtaposed against the plutonic rocks, including the Klukwan complex, to the east by the Tukgahgo Mountain fault, which strikes northwest and dips steeply. The veins and their settings appear similar to those at the Road Cut prospect (SK006) and unnamed occurrences (SK001, SK003) to the southeast. The Late Triassic age of the host rocks establishes a maximum age for the veins.
  • Age = Late Triassic or younger based on the age of host rocks (Gilbert and others, 1987).

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Probably inactive

Mining district

District name Juneau (Skagway subdistrict)

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF SK033

Bibliographic references

  • Deposit

    MacKevett, E.M., Jr., Robertson, E.C., and Winkler, G.R., 1974, Geology of the Skagway B-3 and B-4 quadrangles, southern Alaska: U.S. Geological Survey Professional Paper 832, 33 p.

  • Deposit

    Plafker George, Hudson, T.L., and Silberling, N.J., 1979, Upper Triassic fossils from a sequence of volcanic and sedimentary rocks on the Chilkat Peninsula, southeastern Alaska, in Johnson, K.M., and Williams, J.R., eds., The United States Geological Survey in Alaska: Accomplishments during 1978: U.S. Geological Survey Circular 804-B, p. B107-B110.

  • Deposit

    Plafker, George, and Hudson, T., 1980, Regional implications of Upper Triassic metavolcanic and metasedimentary rocks on the Chilkat Peninsula, southeastern Alaska: Canadian Journal of Earth Sciences, v. 17, p. 681-689.

  • Deposit

    Gilbert, W.G., Burns, L.E., Redman, E.C., and Forbes, R.B., 1987, Preliminary bedrock geology and geochemistry of the Skagway B-3 Quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 87-2, 2 sheets, scale 1:36,200.

  • Deposit

    Gilbert, W.G., Still, J.C., Burns, L.E., Wier, K.R., and Redman, E.C., 1991, Geochemistry of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-5, 1 sheet, scale 1:63,360, 75 p.

  • Deposit

    Still, J.C., 1991, Bureau of Mines mineral investigations in the Juneau mining district, Alaska, 1984 - 1988, v. 2, Detailed mine, prospect, and mineral occurrence descriptions, section A, Haines-Klukwan-Porcupine subarea: U.S. Bureau of Mines of Mines Special Publication, 214 p.

  • Deposit

    Still, J.C., Hoekzema, R.B., Bundtzen, T.K., Gilbert, W.G., Wier, K.R., Burns, L.E., and Fechner, S.A., 1991, Economic geology of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-4, 156 p., 5 sheets, scale 1:63,360.

Comments on the references

  • Primary Reference = Gilbert and others, 1991

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins (Cox and Singer, 1986; model 22c).
Deposit Other Comments = These occurrences are on the eastern edge of the Alaska, Chilkat Bald Eagle Preserve.

Reporter information

Type Date Name Affiliation Comment
Reporter 04-FEB-01 T.C. Crafford T. Crafford & Associates