Rex Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Cu; Sb
Ore minerals chalcopyrite; gold; pyrite; stibnite

Geographic location

Quadrangle map, 1:250,000-scale FB
Quadrangle map, 1:63,360-scale A-4
Latitude 64.103
Longitude -148.836
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Rex Creek mine is located in sec. 25, T. 9 S., R. 7 W., Fairbanks Meridian. Rex Creek is a tributary of California Creek that is south of Rex Dome. The creek has been placer mined for a mile, about 3 to 4 miles above its mouth; the mine is approximately 2.5 miles southeast of Rex Dome. The mine is locality 64 of Cobb (1972 [MF 410]).

Geologic setting

Geologic description

Bedrock in the upper drainage is quartz-orthoclase-sericite schist and augen gneiss of the Totatlanika Schist; in the lower reaches, the creek is underlain by the Tertiary sandstone and conglomerate of the Healy Creek Formation (Wahrhaftig, 1970 [GQ-810]). The ground that was mined was 6 to 8 feet deep; the gold was close to or in the top foot of decayed schist bedrock (Capps, 1912, p. 47). Gold occurs in both stream and bench placers (Capps, 1912, p. 47). A bench about 50 feet above the stream was mined in 1910 (Maddren, 1918). The gold was 800 fine (Glover, 1950).
Geologic map unit (-148.838344054062, 64.1025416298006)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Quaternary placer.

Production and reserves

Workings or exploration Prospecting began in 1905 or earlier, and mining was reported in 1910 (Capps, 1912, p. 44,47). Maddren (1918) reported that there was no mining in 1916. Mining occurred from 3 to 4 miles above the mouth, where a bench 50 feet above the creek was mined (Maddren, 1918). In 1925, one man ground sluiced on Rex Creek (Wimmler, 1925 [ATDM MR 195-8, p. 43]). Prospect drilling was reported in 1939 (Smith, 1941, p. 51).
Indication of production Yes; small
Production notes Total production through 1916 was worth about $5,000, or less than 250 ounces (Maddren, 1918, p. 380-383; Cobb, 1976 [OFR 76-662, p. 119]).

References

MRDS Number A015344

References

Reporters J.R. Guidetti Schaefer and C.J. Freeman (Avalon Development Corporation)
Last report date 7/31/2001