Eklutna Tunnel

The Eklutna Tunnel is a mercury 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: Eklutna Tunnel

Commodity

Primary: Mercury

Location

State: Alaska
District: Anchorage

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: Almaden Hg

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Role: Host
Age Type: Host Rock
Age Young: Mesozoic

Analytical Data

Not available

Materials

Ore: Cinnabar

Comments

Comment (Workings): Workings / Exploration = Underground mapping and sampling.

Comment (Reference): Primary Reference = Rose, 1966

Comment (Deposit): Other Comments = Rose (1966) reports several other cinnabar occurrences in the Eklutna River drainage and farther southwest near Turnagain Arm, but there is no record of the exact location or extent of any of the occurrences.

Comment (Geology): Geologic Description = Athern and Judd (1956) report a very small kidney of cinnabar reported in a 10 ft length of fault gouge about 300 ft from the north end of Eklutna tunnel. The bedrock in the area consists of graywacke and minor interbedded argillite of the Mesozoic McHugh Complex and nearby ultramafic rocks of Middle to Early Jurassic age.

Comment (Deposit): Model Name = Almaden Hg ? (Cox and Singer, 1986; model 27b ?)

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Host rock is Mesozoic.

References

Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials in the Anchorage quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1095, 184 p.

Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

Reference (Deposit): Rose, A.W., 1966, Geology and chromite-bearing ultramafic rocks near Eklutna, Anchorage quadrangle, Alaska: Alaska Division of Mines and Minerals Geologic Report 18, 25 p., 1 sheet, scale 1:42,000.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Anchorage quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-409, 1 sheet, scale 1:250,000.

Reference (Deposit): Clark, S.H.B., and Bartsch, S.R., 1971, Reconnaissance geologic map and geochemical analyses of stream sediment and rock samples of the Anchorage B-6 quadrangle, Alaska: U.S. Geological Survey Open-File Report 475, 63 p., 2 sheets, scale 1:36,360.

Reference (Deposit): Winkler, G.R., 1992, Geologic map and summary geochronology of the Anchorage (1 degree x 3 degree) quadrangle, southern Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-2283, 1:250,000.

Reference (Deposit): Athern, M.J., and Judd, W.R., 1956, Final engineering geology report on the Eklutna project: unpublished report of the U.S. Bureau of Reclamation, 109 p.

Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

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