California

Prospect, Active

Commodities and mineralogy

Main commodities Au
Ore minerals gold
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale LG
Quadrangle map, 1:63,360-scale A-1
Latitude 65.0677
Longitude -147.4298
Nearby scientific data Find additional scientific data near this location
Location and accuracy The California prospect is on the divide between Bedrock Creek and Chatham Creek, approximately one-quarter mile east of the Cleary Hill mine. It is in the SE1/4SW1/4 sec. 19, T. 3 N., R. 2 E., of the Fairbanks Meridian.

Geologic setting

Geologic description

Note: As of 2008, this site and several others in the vicinity are being explored as a single entity by Freegold Ventures Inc. (Freeman, 2008) Considerable new mineralization has been discovered that indicates this is part of a larger mineralized system that is described as a separate ARDF site (LG205).
A shaft was sunk on the California prospect on what was believed to be the extension of the Cleary Hill shear zone which was mined extensively on the adjacent Free Gold claim (LG119). The shaft was sunk along the shear zone for 20 feet at a 60S inclination; it then flattened to 40S. for an additional 40 feet (Smith, 1913). A 1- to 3-foot-wide quartz-bearing zone extends nearly to the bottom of the shaft where it is cut off by a flat-lying fault. The ore was reportedly of lower grade than other shear zones in the area; production records are not available. A second shaft was sunk to an unknown depth east of the first shaft but was not accessible in 1912 when visited by Smith (1913). Dump material at this shaft included quartz-feldspar granite which was reportedly associated with a gold-bearing shear zone in the shaft.
Geologic map unit (-147.432248186688, 65.067276950386)
Mineral deposit model Gold-quartz vein.
Age of mineralization Probably about 90 Ma based on analogy with similar gold deposits nearby.

Production and reserves

Workings or exploration A shaft was sunk on the California prospect on what was believed to be the extension of the Cleary Hill shear zone (LG119). The shaft was sunk 20 feet at a 60S inclination along the shear zone and then flattened to 40S for an additional 40 feet (Smith, 1913). A second shaft was sunk to an unknown depth east of the first shaft but was not accessible in 1912 when visited by Smith (1913).
Indication of production Undetermined
Production notes There is no record of production but there may have been a small amount.

References

References

Freeman, C.J., 1992, 1991 Golden Summit project final report, volume 2: Historical summary of lode mines and prospects in the Golden Summit project area, Alaska: Avalon Development Corp., 159 p. (Report held by Freegold Recovery Inc. USA, Vancouver, British Columbia.)
Freeman, C.J., 2008, Executive summary report for the Golden Summit project, Fairbanks Mining District, Alaska: Unpublished Technical Report for Freegold Ventures Ltd., 112 p. (posted on www.sedar.com, March 31, 2008).
Reporters C.J. Freeman, J.R. Guidetti Schaefer (Avalon Development Corporation); D.J. Grybeck (Port Ludlow, WA)
Last report date 6/5/2008