|Quadrangle map, 1:250,000-scale||SB|
|Quadrangle map, 1:63,360-scale||A-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is located on Nagai Island near the point between Northwest Bight and Pirate Shake. The site is 0.3 mile west-northwest of triangulation station Wreck. It is referred to as SBRGX-39 in Wilson and others (1988, locality 13). The location is accurate to within 1,200 feet.|
Geologic descriptionThe country rocks at this site are sedimentary strata of the Lower Cretaceous Shumagin Formation (Wilson and others, 1995). The sedimentary rocks are intruded by a pyritized granodiorite sill. Anomalous values in arsenic, copper, and zinc have been reported both in sedimentary rock and in the intrusive (Wilson and others, 1988).
|Geologic map unit||(-159.882088807888, 55.2091846304502)|
|Alteration of deposit||Pyritization.|
|Workings or exploration||Rock samples 84ACe102a-c collected by the U.S. Geological Survey in the mid-1980s, were reported to be anomalous in arsenic, copper, and zinc (Wilson and others, 1988).|
|Indication of production||None|
Additional commentsThis occurrence is located on lands selected by the Aleut Corporation.
Angeloni, L.M., Wilson, F.H., and Sutley, S.J., 1985, Map and tables showing preliminary rock geochemical data, Port Moller, Stepovak Bay, and Simonof Island quadrangles, Alaska: U.S. Geological Survey Open-File Report 85-470, 179 p., 1 sheet, scale 1:250,000.
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||11/4/2000|