Unnamed (North Marble Island)

The Unnamed (North Marble Island) is a nickel, iron, 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 (North Marble Island)

Commodity

Primary: Nickel
Primary: Iron
Primary: Zinc
Secondary: Copper

Location

State: Alaska
District: Juneau

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

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Sphalerite
Ore: Pyrrhotite
Ore: Pyrite
Ore: Magnetite
Ore: Covellite
Ore: Chalcopyrite

Comments

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Rossman, 1963 ( B 1121-K)

Comment (Deposit): Model Name = Distal hydrothermal replacement possibly related to subjacent granitic intrusions of Cretaceous age.

Comment (Deposit): Other Comments = the site is in Glacier Bay National Park and Preserve.. The first known metallic prospect staked on the island was by S. H. Vevelstad before 1930, who reportedly staked it for nickel. Mr. Vevelstad was an experienced prospector, better known for his discoveries of nickel-copper deposits in the Bohemia Basin area in the Sitka quadrangle.

Comment (Workings): Workings / Exploration = No workings. One claim reportedly located for nickel by S. H. Vevelstad before 1930. Burchard (1914, 1920), who investigated the area for the marble resource, reported mafic or lamprophyric dike rocks cutting marble.

Comment (Geology): Geologic Description = North Marble Island is underlain mainly by crystalline marble that is part of a major marble unit exposed on several islands in Glacier Bay. They include Willoughby, Francis, and Drake Islands as well as North and South Marble Islands. The carbonate-rich section is primarily Devonian in age (MacKevett and others, 1971; Brew and others, 1978). The age of metamorphism and mineralization is probably Cretaceous. Assuming that the area is underlain by the granitic batholith of Cretaceous age that characterizes this province. Small sulfide (chalcopyrite, covellite, magnetite, pyrite, pyrrhotite?, and/or sphalerite) pods, commonly associated with mafic dikes, are widely distributed throughout the province. On North Marble Island, sulfide pods as much as 1.5 ft wide and 15 feet long occur in marble near mafic dikes. The sulfides also occur on joint faces within the dikes (Reed, 1938, p. 69). A mass of sphalerite and magnetite at an unspecified contact (?) was reported by Rossman (1963, p. K51).

Comment (Geology): Age = Cretaceous

References

Reference (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.

Reference (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.

Reference (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.

Reference (Deposit): Burchard, E.F., 1914, Marble resources of the Juneau, Skagway, and Sitka districts, Alaska: U.S. Geological Survey Bulletin 592-C, p. 95-107.

Reference (Deposit): Reed, J.C., 1938, Some mineral deposits of Glacier Bay and vicinity, Alaska: Economic Geology, v. 33, p. 52-80.

Reference (Deposit): Rossman, Darwin, 1963, Geology of the eastern part of the Mount Fairweather quadrangle, Glacier Bay, Alaska: U.S. Geological Survey Bulletin 1121-K, p. K1-K57.

Reference (Deposit): Burchard, E.F., 1920, Marble resources of southeastern Alaska: U.S. Geological Survey Bulletin 682, 118 p.

Reference (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.

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