|Quadrangle map, 1:250,000-scale||RB|
|Quadrangle map, 1:63,360-scale||C-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Glacier Creek is a north-flowing tributary of Big Creek, and is about 3 miles long. The placer ground along Glacier Creek is located approximately at the midpoint of the creek, 3 miles south-southeast of Ruby. The coordinates listed correspond to location 3 of Cobb (1972 [MF405]) and mark the approximate midpoint of the creek, in section 22, T. 9 S., R. 17 E. of the Kateel River meridian. The location is accurate within 1.5 miles.|
Geologic descriptionThe bedrock underlying Glacier Creek is slaty schist; abundant crystalline limestone and dolostone are present at the head of the creek (Eberlein and others, 1977). Gold was found on Glacier Creek as early as 1946 (Mertie, 1936). In 1953, a sluice box concentrate contained 29 percent bismuth (White and Stevens, 1953). Near the head of the creek, muck and gravel are about 70 feet thick. Cassiterite and some gold were recovered from dump piles (Eberlein and others, 1977) of unknown location. The main pay streak is about 1 1/2 to 2 miles downstream from the head of the stream. It is about 10 feet wide and 2 feet thick, and occurs in a bench on the east side of the creek. Chapman rand others (1963) reported estimated gold yield from some workings was 25 to 30 cents per square foot of bedrock (gold at $35 an ounce).
|Geologic map unit||(-155.449327073992, 64.6954586312685)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Glacier Creek was intermittent mined prior to 1977 and may have been mined or explored more recently (Eberlein and others, 1977).|
|Indication of production||Yes; small|
|Production notes||Estimated gold yield from some of the workings was 25 to 30 cents per square foot (gold at $35 an ounce) (Chapman and others, 1963).|
Chapman, R.M., Coats, R.R., and Payne, T.G., 1963, Placer tin deposits in central Alaska: U.S. Geological Survey Open-File Report 239, 53 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Ruby quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-405, 1 sheet, scale 1:250,000.
Cobb, E.H., and Chapman, R.M., 1981, Mineral occurrences (other than mineral fuels and construction materials) in the Kantishna River and Ruby quadrangles, Alaska: U.S. Geological Survey Open-File Report 81-170, 94 p.
Eberlein, G.D., Chapman, R.M., Foster, H.L., and Gassaway, J.S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open-File Report 77-168-D, 132 p., 1 sheet, scale 1:1,000,000.
Mertie, J.B., Jr., 1936, Mineral deposits of the Ruby-Kuskokwim region, Alaska: U.S. Geological Survey Bulletin 864-C, p. 115-245.
|Reporters||C.E. Cameron (Alaska Division of Geological and Geophysical Surveys)|
|Last report date||3/22/2000|