Latitude: 64°52'51"N
Longitude: 148°1'33"W
Location: The Michley mine is located in the SE1/4SW1/4 sec. 30, T. 1 N., R. 2 W., Fairbanks Meridian. This mine is at an elevation of about 1,560 feet in the head of Sheep Creek. It is about 0.8 mile east of the top of Ester Dome. This mine is locality 13 of Cobb (1972 [MF 410]).
Geology: By 1931, a 200-foot crosscut was driven S. 75 E. into the hill through flat-lying quartz-mica schist (Hill, 1933, p. 149). Several narrow quartz veinlets with north-south strikes and steep dips either to the east or west are exposed in the tunnel. The quartz is milky white and does not appear to carry many sulfides. About 155 feet from the mouth of the tunnel, short drifts to both the north and south follow a vein that is oriented N. 4 W., dipping 60 E. near the the crosscut, but is nearly vertical in the face of the south drift. The vein is generally composed of white quartz about 2 inches thick; but in one zone, the white quartz is 12 inches thick with 4 to 6 inches of gouge surrounding it. The ore from a small stope just north of the crosscut is said to have returned approximately $10 of gold per ton (0.48 ounce of gold per ton) (Hill, 1933, p. 149).
Workings: By 1931, a 200-foot crosscut was driven S. 75 E. into the hill (Hill, 1933, p. 149). About 155 feet from the mouth of the tunnel, short drifts to both the north and south follow a vein that is oriented N. 4 W., dipping 60 E. near the the crosscut, but is nearly vertical at the face of the south drift.
Production: Ore from a small stope is said to have returned approximately $10 of gold per ton (0.48 ounce of gold per ton) (Hill, 1933, p. 149).
Commodities (Major) - Au
Development Status: Yes; small
Deposit Model: Schist-hosted gold-quartz vein
References
Chapman, 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. Cobb, E.H., 1972, Metallic mineral resources map of the Fairbanks quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-410, 1 sheet, scale 1:250,000. Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Fairbanks quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-662, 174 p. Hill, J.M., 1933, Lode deposits of the Fairbanks district, Alaska: U.S. Geological Survey Bulletin 849-B, p. 29-163.
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