Unnamed (northwestern Annette Island)

The Unnamed (northwestern Annette Island) is a silver 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

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Unnamed (northwestern Annette Island)

Commodity

Primary: Silver

Location

State: Alaska
District: Ketchikan

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: Low-sulfide Au-quartz vein

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite
Gangue: Quartz
Gangue: Calcite

Comments

Comment (Geology): Geologic Description = The area of this site is underlain by Upper Jurassic or Cretaceous flyschlike metasedimentary rocks (Berg, 1972 [I 684]; Berg and others, 1988). The rocks were regionally metamorphosed to greenschist-grade phyllite and semischist in Late Cretaceous time. . The occurrence consists of quartz-calcite-pyrite fissure veins in argillite and minor metagraywacke (Karl, 1992, loc. 6). A sample of one of the veins contained 2 ppm Ag and 150 ppm Cr.

Comment (Deposit): Model Name = Low-sulfide Au-quartz veins? (Cox and Singer, 1986; model 36a)

Comment (Reference): Primary Reference = Karl, 1992

Comment (Workings): Workings / Exploration = A sample of one of the veins contained 2 ppm Ag and 150 ppm Cr.

Comment (Geology): Age = Probably Late Cretaceous or younger.

References

Reference (Deposit): Karl, S.M., 1992, Map and table of mineral deposits on Annette Island, Alaska: U.S. Geological Survey Open-File Report 92-690, 57 p., 1 map, scale 1:63,360.

Reference (Deposit): Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map MF-1807,27 p., scale 1:250,000.

Reference (Deposit): Berg, H.C., 1972, Geologic map of Annette Island, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-684, 8 p., 1 sheet, scale 1:63,360,

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