|Quadrangle map, 1:250,000-scale||PM|
|Quadrangle map, 1:63,360-scale||A-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Normandy prospect is located on Unga Island on the beach and cliffs on the east shore of Acheredin Bay (Wilson and others, 1988, locality 38). The map site is in the NW1/4 of sec. 4, T. 58 S., R. 75 W., of the Seward Meridian. The location is accurate to within 1,000 feet.|
The Normandy prospect, discovered in 1981, consists of a northeast-striking 15- to 40-foot-wide zone of quartz veins, silicified andesite, and sulfides, chiefly pyrite, chalcopyrite, galena, and sphalerite. The andesite is part of the late Eocene to early Oligocene Popof volcanic rocks (Wilson and others, 1995). The mineralization is exposed on the sea cliffs and extends at least 300 feet into the ocean. It is traceable on land as an airphoto lineament. VLF-EM surveys indicate anomalies on strike at 600 and 3,000 feet from the beach. Deep soil and flooding have prevented trenching from exposing the deposit. Assays of rock samples show up to 0.3 percent copper, 3.7 percent lead, 9.4 percent zinc, 2.6 ppm gold, and 214 ppm silver (Peterson and others, 1982).Battle Mountain Exploration Company examined the site in 1986. A grab sample collected at that time contained 1.71 ppm gold (Pilcher, 1986).
|Geologic map unit||(-160.683068246669, 55.1901625196388)|
|Mineral deposit model||Polymetallic veins (Cox and Singer, 1986; model 22c)|
|Mineral deposit model number||22c|
|Age of mineralization||Eocene or younger.|
|Alteration of deposit||The alteration consists of silicification.|
|Workings or exploration||
Resource Associates of Alaska and UNC Teton Exploration Drilling Company collected 27 rock samples, conducted VLF-EM surveys, and cut several trenches that did not expose the deposit. Rock samples contained as much as 0.3 percent copper, 3.7 percent lead, 9.4 percent zinc, 2.6 ppm gold, and 214 ppm silver.Battle Mountain Exploration Company examined the site in 1986. A grab sample collected at that time contained 1.71 ppm gold.
|Indication of production||None|
Additional commentsThis prospect is located on land patented by, or interim-conveyed to, the Aleut Corporation.
Peterson, R.J., Lemmers, J., Handverger, P., Gallagher, J., Pilcher, R., East, J., Macleod, T., Bartels. E., 1982, Geology and precious metals potential Unga, Popof, and Korovin Islands, Shumagin Group, Aleutian Chain, Alaska: UNC Teton Exploration Drilling Company report, 127 p., 5 map sheets, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)
Pilcher, S.H., 1986, Unga project: Battle Mountain Exploration Company report, 33 p. (Report held by the Aleut Corporation, Anchorage, Alaska.)
Wilson, F.H., Detterman, R.L., Miller, J. W., and Case, J.E., 1995, Geologic map of the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-2272, 1 sheet, scale 1:250,000.
|Last report date||1/15/2001|