Unnamed (near Metlakatla)

The Unnamed (near Metlakatla) is a molybdenum, gold, and 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 (near Metlakatla)

Commodity

Primary: Molybdenum
Primary: Gold
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

Not available

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Sheared granitic hostrock is silicified and/or sericitized, and permeated with hydrothermal hematite.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite

Comments

Comment (Workings): Workings / Exploration = A sample of hematitic granitic rock contained 0.28 ppm Au and 5 ppm Ag; a sample from a pyrite seam contained 0.7 ppm Ag and 20 ppm Mo (Karl, 1992, loc. 44).

Comment (Deposit): Model Name = Disseminated sulfide and iron mineralization of undetermined origin in granitic rock.

Comment (Geology): Geologic Description = The country rock in the area of this site is Silurian trondhjemite (Berg, 1972 [I 684]; Berg and others, 1988). The site is in or near a major N-S fault zone between mainland Annette Island and the peninsula containing the town of Metlakatla. The trondhjemite in and near this zone is intensely sheared and brecciated, with widespread sericitization, silicification, and formation of hydrothermal(?) potassium feldspar and specular hematite. Some of these features probably are due to Late Cretaceous greenschist-grade regional metamorphism, and some to subsequent large-scale faulting. The occurrence consists of disseminated pyrite and hematite, and of thin seams of pyrite, in a 1000-foot-wide zone of cataclastic, pervasively altered, granitic rock (Karl, 1992, loc. 44). A sample of hematitic granitic rock contained 0.28 ppm Au and 5 ppm Ag; a sample from a pyrite seam contained 0.7 ppm Ag and 20 ppm Mo.

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

Comment (Reference): Primary Reference = Karl, 1992

References

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,

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): 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.

The Top Ten Gold Producing States

These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.