Thormac

The Thormac is a silver and gold 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: Thormac

Commodity

Primary: Silver
Primary: Gold
Secondary: Arsenic
Secondary: Mercury

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

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite
Gangue: Quartz

Comments

Comment (Workings): Workings / Exploration = In 1982 UNC Teton Exploration Drilling Company explored the occurrence and collected several samples.

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

Comment (Geology): Age = Eocene or younger.

Comment (Deposit): Model Name = Epithermal gold vein

Comment (Deposit): Other Comments = This site is located on land either selected or patented by, or interim-conveyed to, the Aleut Corporation.

Comment (Geology): Geologic Description = This occurrence is a quartz vein system with a strike length of 1,100 feet. Individual veins within the system exceed 3 feet in width. The host rock is andesite of the late Eocene to early Oligocene Popof volcanic rocks (Wilson and others, 1995). The system contains abundant gossanous vugs. There is no indication of base metal sulfides, and the gossans probably reflect oxidation of pyrite. Grab samples contained 0.005 to 0.135 ppm gold, 0.2 to 19.0 ppm silver, as much as 800 ppm arsenic, and 5.0 ppm or more mercury (Peterson and others, 1982).

Comment (Exploration): Status = Inactive

References

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): Peterson, R.J., Lemmers, J., Handverger, P., Gallagher, J., Pilcher, R., East, J., Macleod, T., Bartels. E., 1982, Geology and precious metals potential Unga, Popof, and Korovin Islands, Shumagin Group, Aleutian Chain, Alaska: UNC Teton Exploration Drilling Company report, 127 p., 5 map sheets, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

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.

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