Wallace

The Wallace is a 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: Wallace

Commodity

Primary: Gold
Secondary: Zinc

Location

State: Alaska
District: Aniak

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: Low-sulfide Au-quartz vein

Orebody

Not available

Structure

Not available

Alterations

Alteration Text: Silicification.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Gold
Ore: Sphalerite
Ore: Telluride
Gangue: Amphibole
Gangue: Chlorite
Gangue: Limonite

Comments

Comment (Reference): Primary Reference = This record

Comment (Geology): Age = Cretaceous or Tertiary. The gold-bearing quartz veins crosscut a granitic dike that may be mid-Cretaceous in age. The dike intrudes Jurassic volcanic rocks.

Comment (Geology): Geologic Description = In 1945, R. E. Wallace of the U.S. Geological Survey discovered free gold in quartz veins cutting a granitic dike at this location (unpub. field data, 1945). Wallace described the deposit in unpublished notes and memoranda (1945, 1997), although the U.S. Geological Survey announced the discovery in a press release on August 4, 1945. The steeply dipping or vertical granitic dike is about 40 feet wide and trends N 20 E, subparallel to the ridge. Wallace traced it along strike for about 300 feet in this area. A similar dike may occur a few thousand feet to the southwest (RM026). Wallace noted that quartz veinlets were localized in the southeastern half of the dike and that the gold occupied open spaces in the interior of the veinlets. Two samples were assayed; one contained 0.59 ounce of gold per ton and the other 1.3 ounces of gold per ton. Accompanying the gold was a slightly more abundant, soft (hardness of 2 to 3), silver-white mineral having laminar cleavage. This mineral was tentatively identified as a telluride. Limonite and traces of sphalerite, chlorite, and amphibole were also present in the veins. The dike, which may be an apophysis of a nearby mid-Cretaceous pluton, intrudes Jurassic volcanic rocks (Box and others, 1993).

Comment (Workings): Workings / Exploration = Prospecting pit(s) are probably present at this location.

Comment (Deposit): Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)

References

Reference (Deposit): Box, S.E, Moll-Stalcup, E.J., Frost, T.P., and Murphy, J.M., 1993, Preliminary geologic map of the Bethel and southern Russian Mission quadrangles, southwestern Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2226-A, 20 p., scale 1:250,000.

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