|Quadrangle map, 1:250,000-scale||CI|
|Quadrangle map, 1:63,360-scale||B-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Ptarmigan Creek is a tributary of Birch Creek. It flows south from Porcupine Dome and crosses the Steese Highway in the NW1/4 NE1/4 sec. 17, T. 7 N., R. 11 E.|
Headwaters of Ptarmigan Creek are on the south slopes of Porcupine Dome. Bedrock underlying Ptarmigan Creek is the Upper Quartzite and Upper Schist units mapped by Wiltse and others (1995). The Upper Quartzite consists of porphyroblastic-albite-chlorite-muscovite-quartz schist, quartzites and micaceous quartzites. The Upper Schist is a mixed unit dominated by variably garnetiferous, pelitic quartz-muscovite schist, muscovite-quartz schist and chlorite-quartz-muscovite schist with distinct intervals of garnetiferous calcareous albite-porphyroblastic muscovite-chlorite schist.Sediments are said to contain large amounts of copper (Burand, 1965). Gold can be readily panned from the thin veneer of gravels on the bedrock in Ptarmigan Creek just upstream from its junction with Eagle Creek (Lampright, 1996, p. 75). Known years of activity are 1925, 1953, 1954 and 1969 through 1982 (Menzie and others, 1983, p. 51).
|Geologic map unit||(-145.521455762796, 65.4396219609704)|
|Mineral deposit model||Gold placer deposit (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Workings or exploration||Known years of activity are 1925, 1953, 1954 and 1969 through 1982 (Menzie and others, 1983, p. 51).|
|Indication of production||None|
Burand, W.M., 1965, A geochemical investigation between Chatanika and Circle hot springs, Alaska: Alaska Division of Mines and Minerals Geochemical Report 5, 11 p.
Lampright, R.L., 1996, Gold placer deposits near Fairbanks Alaska--An inventory of the gold placer mines, prospects, and deposits located within the Big Delta Charley River, Circle, Eagle, Fairbanks, and Livengood quadrangles: Nederland, Colorado, Iron Fire Publications, Anchorage, Alaska, 135 p.
Menzie, W.D., Foster, H.L., Tripp, R.B., and Yeend, W.E., 1983, Mineral resource assessment of the Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-170-B, 61 p., 1 sheet, 1:250,000.
|Reporters||C.J. Freeman, J.R. Guidetti Schaefer, A.S. Clements (Avalon Development Corporation)|
|Last report date||9/14/1998|