Unnamed (east of Sapsuk Lake)

The Unnamed (east of Sapsuk Lake) is a copper, silver, zinc, and lead 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 (east of Sapsuk Lake)

Commodity

Primary: Copper
Primary: Silver
Primary: Zinc
Primary: Lead
Secondary: Gold
Secondary: Molybdenum

Location

State: Alaska
District: Alaska Peninsula

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: Porphyry Cu
Model Name: Porphyry Cu-Mo

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite
Ore: Chalcopyrite
Gangue: Tourmaline

Comments

Comment (Deposit): Model Name = Porphyry Cu, Porphyry Cu-Mo (Cox and Singer; 1986; models 17 and 21a)

Comment (Deposit): Model Number = 17, 21a

Comment (Deposit): Other Comments = This site is located within the Alaska Peninsula National Wildlife Refuge.

Comment (Reference): Primary Reference = Trujillo and others, 1982

Comment (Geology): Geologic Description = At this site a 0.5-mile-square color anomaly has resulted from the oxidation of disseminated pyrite in Tertiary andesitic to dacitic volcanic rocks (Wilson and others, 1988; 1995). The main areas of interest are three or more tourmaline-cemented breccia pipes occurring near a 40- by 200-foot plug or dike of quartz porphyry (Trujillo and others, 1982). The largest pipe is approximately 40 feet in diameter and contains dacite porphyry fragments and some disseminated chalcopyrite. Soil, rock, and pan samples contained as much as 0.13 ppm gold, 2.8 ppm silver, 255 ppm copper, 410 ppm lead, 232 ppm zinc, and 21 ppm molybdenum.

Comment (Geology): Age = Tertiary.

Comment (Workings): Workings / Exploration = In 1982 Resource Associates of Alaska examined the occurrence and collected 30 rock samples, 4 pan samples, and 1 soil sample. These assayed as much as 0.13 ppm gold, 2.8 ppm silver, 255 ppm copper, 410 ppm lead, 232 ppm zinc, and 21 ppm molybdenum (Trujillo and others, 1982).

Comment (Exploration): Status = Inactive

References

Reference (Deposit): Wilson, F.H., Detterman, R.L., Miller, J. W., and Case, J.E., 1995, Geologic map of the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-2272, 1 map sheet, scale 1:250,000.

Reference (Deposit): Wilson, F.H., White, W.H., and DuBois, G.D., 1988, Brief descriptions of mines, prospects, and mineral occurrences in the Port Moller and Stepovak Bay quadrangles, Alaska Peninsula: U.S. Geological Survey Open-File Report 88-666, 128 p., scale 1:250,000.

Reference (Deposit): Trujillo, R.S., Tapper, C.J., Alvarez, T.J., Porterfield, Ben, and Toupe, W.M., 1982, Exploration and evaluation of precious metal potential of portions of Aleut Corporation lands, southwest Alaska 1982: Unpublished Resource Associates of Alaska report, 91 p, 33 mpas, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

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