Big Blue Prospect, Fairbanks District, Fairbanks North Star Borough, Alaska, USA
Location: The Big Blue prospect is located west of Henderson Road, just west of the Prometheus shaft (FB041), at an elevation of approximately 1,550 feet (Hill, 1933, p. 148). It is about 1.3 miles east-southeast of the top of Ester Dome, in the NW1/4 sec. 32, T. 1 N., R. 2 W., Fairbanks Meridian.
Geology: Material on the dump suggests the ore zone consisted of a fault zone of crushed schist, quartz, and gouge (Hill, 1933, p. 148). The vein strikes N. 27 E., but a dip could not be determined at the time of Hill's visit in 1931, due to the collapse of the prospect pits. The bedrock is mainly biotite schist; many pieces of quart-mica schist are on several of the dumps. The Big Blue prospect is in a unit of quartz-muscovite schist, quartzite, and chlorite-quartz schist of the Fairbanks Schist as mapped by Newberry and others (1996).
Workings: In 1931, the Big Blue lead consisted of a number of shallow shafts and pits (Hill, 1933, p. 148).
Commodities (Major) - Au
Development Status: Undetermined
Deposit Model: Schist-hosted gold-quartz vein
ReferencesChapman, R.M., and Foster, R.L., 1969, Lode mines and prospects in the Fairbanks district, Alaska: U.S. Geological Survey Professional Paper 625-D, 25 p., 1 plate. Hill, J.M., 1933, Lode deposits of the Fairbanks district, Alaska: U.S. Geological Survey Bulletin 849-B, p. 29-163.
1 entry listed. 1 valid mineral.
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