Disney Prospect, Alaska Peninsula District, Aleutians East Borough, Alaska, USA
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Location: The Disney prospect is located on Unga Island, approximately 1.5 miles northeast of Acheredin Lake and 3 miles west of Baralof Bay (Wilson and others, 1988, locality 35). The map site is at an elevation of 700 feet, about 0.2 mile south-southeast of the center of sec. 22, T. 57 S., R. 75 W., of the Seward Meridian. The location is accurate to within 1,200 feet.
Geology: The Disney prospect consists of a siliceous knob 150 feet in diameter near a strong northeast-trending fault. Quartz and red jasper float are also present. The host rocks are andesite tuffs of the late Eocene to early Oligocene Popof volcanic rocks (Wilson and others,1995). The tuffs are argillized, chloritized, and locally silicified. Trenching exposed thin quartz and jasper veins as much as 2 feet thick. The highest precious metal values obtained in grab samples are 0.20 ppm gold and 18 ppm silver. Channel samples contained as much as 0.015 ppm gold (one sample only), 0.2 ppm silver, 171 ppm lead, 106 ppm zinc, 330 ppm arsenic, and 2.8 ppm mercury (Peterson and others, 1982).
Workings: In 1982 UNC Teton Exploration Drilling Company collected 26 grab and 35 channel samples, and dug 3 trenches totalling 175 feet long.
Age: Eocene or younger.
Alteration: The tuffs exhibit argillization, chloritization, and local silicification.
Commodities (Major) - Ag, Au; (Minor) - As, Cu, Hg, Pb, Zn
Development Status: None
Deposit Model: Epithermal gold vein
Mineral List
2 entries listed. 1 valid mineral.
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References
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.) 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. Wilson, F.H., White, W.H., and DuBois, G.D., 1988, Brief descriptions of mines, prospects, and mineral occurrences in the Port Moller and Stepovak Bay quadrangles, Alaska Peninsula: U.S. Geological Survey Open-File Report 88-666, 128 p., 1 plate, scale 1:250,000.
