|Quadrangle map, 1:250,000-scale||PM|
|Quadrangle map, 1:63,360-scale||B-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is located on western Unga Island approximately 1 mile due south of the head of Zachary Bay. The map site is at an elevation of about 1,100 feet, near the center of sec. 31, T. 56 S., R. 74 W., of the Seward Meridian. It is referred to as PMRGX-10 in Wilson and others (1988, locality 59). The location is accurate to within 1,200 feet.|
Geologic descriptionAt this site propylitically altered dacite(?) in the Oligocene to Miocene Unga Formation (Wilson and others, 1995) locally contains disseminated pyrite and possibly other, undetermined, sulfides. Three rock samples collected here by the U.S. Geological Survey in the 1980s were reported to be anomalous in antimony, arsenic, lead, silver, and zinc (Wilson and others, 1988).
|Geologic map unit||(-160.675038120711, 55.2861703553425)|
|Alteration of deposit||Dacite(?) at this site exhibits propylitic alteration.|
|Workings or exploration||Rock samples 85AAi107, and 109-11 collected by the U.S. Geological Survey in the mid-1980s were reported to be anomalous in antimony, arsenic, lead, silver, and zinc (Wilson and others, 1988).|
|Indication of production||None|
Additional commentsThe site is located on land selected or patented by, or interim-conveyed to, the Aleut Corporation.
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., Harris, E.E., and Bailey, E.A., 1987, Preliminary analytical results and sample locality map for rock samples collected in 1985 and 1986, Port Moller and Stepovak Bay quadrangles, Alaska: U.S. Geological Survey Open-File Report 87-497, 44 p., 1 plate, scale 1:250,000.
|Last report date||1/23/2001|