Unnamed (near California Creek)

The Unnamed (near California 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: Unnamed (near California Creek)

Commodity

Primary: Gold

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 Type: L
Alteration Text: Sericitization and silicification.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Gold
Ore: Pyrite
Gangue: Quartz
Gangue: Chlorite
Gangue: Calcite

Comments

Comment (Reference): Primary Reference = Frost, 1990

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

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

Comment (Geology): Geologic Description = Frost (1990) described gold- and pyrite-bearing quartz veins cutting sericitized andesite and volcaniclastic hornfels at this location. The veins are vuggy and contain euhedral quartz prisms extending into open spaces. Other gangue minerals in the iron oxide-stained veins are commonly calcite and chlorite. A quartz vein from this prospect contained 4.5 ppm gold (Frost, 1990, sample locality 3). Bedrock in the area includes thermally metamorphosed Jurassic volcanic or volcaniclastic rocks and a small granitic stock (Box and others, 1993). Much of the thermal metamorphism is caused by a large mid-Cretaceous granitic pluton exposed to the north in the headwaters of the Tuluksak River. This prospect may be close to a granitic dike outcrop described in unpublished 1945 and 1997 notes and memoranda by R. E. Wallace (USGS). The dike is cut by small, auriferous quartz veins along its southeast margin. A granitic dike outcrop cut by auriferous quartz veins is at the Wallace prospect, about one-half mile to the northeast along this ridge (RM025).

Comment (Geology): Age = Cretaceous or Tertiary. The gold-bearing quartz veins crosscut hornfels developed in country rocks around a mid-Cretaceous granitic pluton.

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.

Reference (Deposit): Frost, T.P., 1990, Geology and geochemistry of mineralization in the Bethel quadrangle, southwestern Alaska, in Goldfarb, R. J., Nash, J. T., and Stoeser, J. W., eds., Geochemical studies in Alaska by the U.S. Geological Survey, 1989: U.S. Geological Survey Bulletin 1950, p. C1-C9.

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