Idaho Bar

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale LG
Quadrangle map, 1:63,360-scale B-6
Latitude 65.45
Longitude -149.983
Nearby scientific data Find additional scientific data near this location
Location and accuracy Cobb (1972, MF-413), loc. 58; SE1/4NE1/4 sec.10, T. 7 N., R. 12 W., of the Fairbanks Meridian. This deposit is on a high gravel bench between Little Minook, Dawson and Hunter Creeks. Accuracy is within 1,500 feet.

Geologic setting

Geologic description

Coarse and shotty gold occurs in high Pliocene (?) gravels about 1,000 feet higher than the mouth of Little Minook Creek (Mertie, 1934). A shaft at the crest of the ridge is said to have been sunk 100 feet to bedrock (Mertie, 1934). Coarse gravels contain quartzite, quartzite breccia, vein quartz and chert (Prindle and Hess, 1905). Heavy minerals include ilmenite, hematite, and magnetite (Mertie, 1934). Although there was not enough water for large-scale mining, prospecting and drift mining occurred in 1913, the late 1920s and the 1930s (Cobb, 1976; OFR 76-633, p. 102). Some work was reported as late as 1975 (Eberlein and others, 1977, p. 66), and trench work was reported in 1985 (J. Munsell, oral communication, 1999).
Geologic map unit (-149.985518740578, 65.4495327664633)
Mineral deposit model Placer gold deposit (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a

Production and reserves

Workings or exploration Although there was not enough water for large-scale mining, prospecting and drift mining occurred in 1913, the late 1920s and the 1930s (Cobb, 1976; OFR 76-633, p. 102). Some work was reported as late as 1975 (Eberlein and others, 1977, p. 66) and trench work was reported in 1985 (J. Munsell, oral communication, 1999).
Indication of production Yes; small
Production notes Although there was not enough water for large-scale mining, prospecting and drift mining occurred in 1913, the late 1920s and the 1930s, and some work was reported as late as 1975 (Cobb, 1976; OFR 76-633, p. 102; Eberlein and others, 1977, p.66).

Additional comments

Similar deposits that lie on the top of the ridges southeast of Little Minook and Hoosier Creeks, in the Tanana quadrangle, are known as California and Florida Bars.

References

MRDS Number A015471

References

Reporters C.J. Freeman, J.R. Guidetti Schaefer (Avalon Development Corporation)
Last report date 5/4/1999