Ruby Creek

The Ruby Creek 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: Ruby Creek

Commodity

Primary: Gold
Secondary: Silver

Location

State: Alaska
District: Eagle

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Model Name: Placer Au-PGE

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Gold
Ore: Silver

Comments

Comment (Deposit): Model Name = Placer Au (Cox and Singer, 1986; model 39a).

Comment (Deposit): Other Comments = See also Fourth of July Creek (CY015). This site is within the Yukon-Charley Rivers National Preserve.

Comment (Geology): Geologic Description = The bedrock of Ruby Creek is composed of Cretaceous to Tertiary conglomerate and other sedimentary rocks (Dover and Miyaoka, 1988). The placer gold is found in the 20 inches of gravel above bedrock; bedrock was 12 to 15 feet from the surface in 1912 (Prindle and Mertie, 1912). ? the creek was first mined in the early 1900s. Mining was by open-cut methods because the bedrock was less than 15 feet below the surface. Values of $50 to $75 per 12-foot by 12-foot sluice box were reported in the early 1900s (1901-1910 dollars). Mining operations were frequently constrained by a lack of water. In 1926, production was 5 ounces of gold and one ounce of silver (National Park Service, 1990).

Comment (Production): Production Notes = In 1926, production was 5 ounces of gold and one ounce of silver (National Park Service, 1990). Values of $50 to $75 per 12-foot by 12-foot sluice box were reported in the early 1900s.

Comment (Workings): Workings / Exploration = The creek was first mined in the early 1900s, but more mining activity occurred in 1911. Mining was by open-cut methods because the bedrock was less than 15 feet below the surface. Mining operations were frequently constrained by a lack of water (National Park Service, 1990).

Comment (Reference): Primary Reference = Prindle and Mertie, 1912

Comment (Geology): Age = Quaternary.

References

Reference (Deposit): Prindle, L.M., 1913, A geologic reconnaissance of the Circle quadrangle, Alaska: U.S. Geological Survey Bulletin 538, 82 p.

Reference (Deposit): National Park Service, 1990, Final environmental impact statement, volume 1, Mining in Yukon-Charley Rivers National Preserve, Alaska: National Park Service, Anchorage, Alaska, p. 36-44.

Reference (Deposit): Dover, J.A., and Miyaoka, R.T., 1988, Reinterpreted geologic map and fossil data, Charley River quadrangle, east-central Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2004, 2 sheets, scale 1:250,000.

Reference (Deposit): Chapin, Theodore, 1914, Placer mining in the Yukon-Tanana region: U.S. Geological Survey Bulletin 592-J, p. 357-362.

Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Charley River and Coleen quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-632, 45 p.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Charley River quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-390, 1 sheet, scale 1:250,000.

Reference (Deposit): Prindle, L.M., and Mertie, J.B. Jr., 1912, Gold placers between Woodchopper and Fourth of July Creeks, upper Yukon River: U.S. Geological Survey Bulletin 520-G, p. 201-210.

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