California Creek

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; W
Ore minerals gold; scheelite

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-6
Latitude 60.9747
Longitude -149.1405
Nearby scientific data Find additional scientific data near this location
Location and accuracy California Creek is located in T. 10 and 11 N., R. 1 and 2 E., of the Seward Meridian. It joins Glacier Creek two miles from Turnagain Arm near the town of Girdwood (misspelled on the 1994 D-6 map). The map site of this placer mine is on California Creek at an elevation of about 400 feet in the N1/2 section 8, T. 10 N., R. 2 E. This is location 131 and 132 of Cobb and Richter (1972), location 159 of MacKevett and Holloway (1977), location 2 of Tysdal (1978 [MF-880-B]), location 131 and 132 of Cobb and Tysdal (1980), and location P-92 of Jansons and others (1984). The location is accurate to within 300 feet.

Geologic setting

Geologic description

California Creek drains an area underlain chiefly by slate and graywacke of the Valdez Group of Late Cretaceous age (Nelson and others, 1985). The creek flows in a narrow, steep-walled canyon, and the gravels consist of slate, graywacke, and some granite (Tysdal, 1978 [MF-880-B]). There is little accumulation of gravels. An alluvial fan deposited at the lower end of the creek contains disseminated fine-grained gold. Gravels exposed along the creek contain considerable clay and in large part are probably glacial till (Jansons and others, 1984). Grades are reported to be extremely variable.
Geologic map unit (-149.142679286819, 60.9741322663373)
Mineral deposit model Placer Au (alluvial) (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration
The creek received a good deal of attention from prospectors between 1898 and 1902 and yielded some gold (Capps, 1916). A concentrate sample near the mouth contained sheelite (Jasper, 1967).
The U.S. Bureau of Mines collected two bench samples at the canyon mouth that contained 0.0006 and 0.0007 ounce of gold per cubic yard (Jansons and others, 1984).
Indication of production None
Production notes The U.S. Bureau of Mines estimated production at 400 ounces of gold since 1898 (Jansons and others, 1984).

Additional comments

California Creek is situated in both the Anchorage and the Seward quadrangles.

References

References

Hoekzema, R.P., and Sherman, G.E., 1983, Mineral investigations in the Chugach National Forest, Alaska (Peninsula study area): U.S. Bureau of Mines in-house report; held at U.S. Bureau of Land Management Alaska State Office, Anchorage, 524 p.
Reporters Jeff A. Huber (Anchorage)
Last report date 4/7/2000