Unnamed (near Devilfish Bay)

The Unnamed (near Devilfish Bay) is a uranium, molybdenum, and copper 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 Devilfish Bay)

Commodity

Primary: Uranium
Primary: Molybdenum
Primary: Copper

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

Physiography

Not available

Mineral Deposit Model

Model Name: Skarn Cu

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Calcsilicate minerals associated with intrusion of quartz monzonite into calcareous rocks.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Ore: Magnetite
Ore: Molybdenite

Comments

Comment (Workings): Workings / Exploration = Only work noted in 1975 was a single, hand-dug pit; little indication of any work since. But see PE053 for several blocks of claims staked around this prospect and active through at least 1981.

Comment (Production): Production Notes = None

Comment (Reference): Primary Reference = Herreid and Kaufman, 1964

Comment (Reserve-Resource): Reserves = None

Comment (Deposit): Model Name = Cu-Mo skarn with uranium?(Cox and Singer, 1986; model 18b)

Comment (Geology): Geologic Description = Magnetite, chalcopyrite, and minor molybdenite occur in tactite at contact between a Cretaceous quartz monzonite pluton and Cretaceous hornfels formed from calcareous graywacke of the Silurian Bay of Pillars Formation (Herreid and Kaufman, 1964, p. 4; Eakins, 1975, p. 54-57; and Brew and others, 1984). One sample of the tactite contained 8 ppm equivalent uranium.

Comment (Commodity): Gangue = Calcsilicate minerals in tactite

Comment (Exploration): Status = Probably inactive

Comment (Geology): Age = Related to intrusion of Cretaceous quartz monzonite pluton.

References

Reference (Deposit): Grybeck, D.J., Berg, H.C., and Karl, S.M., 1984, Map and description of the mineral deposits in the Petersburg and eastern Port Alexander quadrangles: U.S. Geological Survey Open-File Report 84-837, 86 p., 1 sheet, scale 1:250,000.

Reference (Deposit): Brew, D. A., Ovenshine, A. T., Karl, S. M., and Hunt, S. J., 1984, Preliminary reconnaissance geologic map of the Petersburg and parts of the Port Alexander and Sumdum 1:250,000 quadrangles, southeastern Alaska: U.S. Geological Survey Open-File Report 84-405, 43 p., 2 sheets, scale 1:250,000.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Petersburg quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-415, 1 sheet, scale 1:250,000.

Reference (Deposit): Herreid, G.H., and Kaufman, M. A., 1964, Geology of the Dry Pass area, southeastern Alaska: Alaska Division of Mines and Minerals Geologic Report 7, 16 p.

Reference (Deposit): Eakins, G.R., 1975, Uranium investigations in southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Geologic Report 44, 62 p.

Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Petersburg quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-870, 53 p.

Reference (Deposit): Maas, K.M., Bittenbender, P E., and Still, J.C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U.S. Bureau of Mines Open-File Report 11-95, 606 p.

Reference (Deposit): Herreid, G.H., and Kaufman, M. A., 1964, Geology of the Dry Pass area, southeastern Alaska: Alaska Division of Mines and Minerals Geologic Report 7, 12 p.

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.