Skagway

The Skagway is a uranium 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: Skagway

Commodity

Primary: Uranium

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: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Model Name: Volcanogenic U

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Clay alteration of rhyolite (?), iron staining.

Rocks

Not available

Analytical Data

Not available

Materials

Not available

Comments

Comment (Geology): Geologic Description = The following description if from Freeman (1963). A small altered body of rhyolite(?) is surrounded by medium-grained quartz diorite. The quartz diorite is cut by several large faults and is intruded by fine-grained andesitic dikes. Uranium occurs adjacent to a prominent, steeply dipping fracture in the rhyolite(?), where it is associated with iron oxide staining and globules of clay that resemble vesicle fillings. The highest grade sample of olive-green clay that was probably hand picked from vesicles in the rhyolite(?), contained 0.72% equivalent uranium and 1.2% uranium. The amount of this material is very small and most of the mineralization consists of highly altered rhyolite(?) stained with red and yellowish brown iron oxides that contained up to 0.22% equivalent uranium. No sulfides or gangue minerals were seen except for specks of purple fluorite. The age of the mineralization is not well established, but it is probably Tertiary based on the Paleocene and Eocene ages (Brew and Ford, 1994) of the intrusive rocks in the area.

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Freeman, 1963

Comment (Workings): Workings / Exploration = One prospect pit yielded a few hundred pounds of specimens, but when inspected by USGS in 1956 no ore was in sight (Berg and Cobb, 1967).

Comment (Geology): Age = Probably Tertiary based on the Paleocene and Eocene ages (Brew and Ford, 1994) of intrusive rocks in the area.

Comment (Deposit): Model Name = Very little information. From the description of Freeman (1963), it is possibly a vein or fissure related uranium occurrence in highly altered rhyolite(?) (Cox and Singer, 1986; model 25f?).

References

Reference (Deposit): Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

Reference (Deposit): Freeman, V.L., 1963, Examination of uranium prospects, 1956: U.S. Geological Survey Bulletin 1155, p. 29-33.

Reference (Deposit): Brew, D.A., and Ford, A.B., 1994, The coast mountains plutonic-metamorphic complex and related rocks between Haines, Alaska, and Fraser, British Columbia q tectonic and geologic sketches and Klondike Highway road log: U.S. Geological Survey Open-File Report 94-268, 25 p.

Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Mt. Fairweather and Skagway quadrangles, Alaska: U.S. Geological Survey Open-File Report 78-316, 123 p.

Reference (Deposit): Berg, H.C., 1984, Regional geologic summary, metallogenesis, and mineral resources of southeastern Alaska: U.S. Geological Survey Open-file Report 84-572, 298 p., 1 plate, scale approx. 1:600,000.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Skagway quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-424, 1 sheet, scale 1:250,000.

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