Unnamed (along the Haines Highway)

The Unnamed (along the Haines Highway) is a silver, gold, and zinc mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Unnamed (along the Haines Highway)

Commodity

Primary: Silver
Primary: Gold
Primary: Zinc
Secondary: Copper

Location

State: Alaska
District: Juneau (Skagway subdistrict)

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Sphalerite
Ore: Pyrite
Ore: Malachite
Ore: Chalcopyrite
Gangue: Quartz

Comments

Comment (Geology): Age = Late Triassic or younger based on the age of host rocks (Gilbert and others, 1987).

Comment (Reference): Primary Reference = Gilbert and others, 1991

Comment (Exploration): Status = Probably inactive

Comment (Deposit): Other Comments = These occurrences are on the eastern edge of the Alaska, Chilkat Bald Eagle Preserve.

Comment (Deposit): Model Name = Polymetallic veins (Cox and Singer, 1986; model 22c).

Comment (Geology): 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.

References

Reference (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.

Reference (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.

Reference (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.

Reference (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.

Reference (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.

Reference (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.

Reference (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.

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