|Quadrangle map, 1:250,000-scale||KR|
|Quadrangle map, 1:63,360-scale||D-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This site is located at the eastern end of Cape Kubugakli and encompasses an area of several square miles (Berg and Cobb, 1967, figure 4, locality 16; Cobb, 1972, MF 459, locality 2; MacKevett and Holloway 1977, locality 2; Church and others, 1989, MF 1539 I, locality 9).|
Quartz stringers 1/2-inch or less thick are present in some felsic dikes and quartz diorite plugs of Miocene age, and in some of the sedimentary rocks cut by the intrusives. The stringers carry minor amounts of galena, gold, magnetite, molybdenite, pyrite, stibnite, and tetrahedrite. Bedrock consists of sedimentary units of the Shelikof formation of Jurassic age. Sericitic and propylitic alteration and silicification have been mapped over an area of several square miles and includes the mineralized rocks.Silt samples collected within this area may exhibit anomalous amounts of molybdenum, whereas panned concentrates may show anomalous antimony, boron, copper, gold, and silver (Church and others, 1989, MF 1539 I, Bulletin 1858). Gold, chalcopyrite, pyrite scheelite, and tourmaline have been noted in the concentrates. Mineralized rock samples may be anomalous in copper, gold, molybdenum, silver, and zinc.
|Geologic map unit||(-155.102093234518, 57.8992999028649)|
|Mineral deposit model||Porphyry Cu, porphyry Cu-Mo, polymetallic vein (Cox and Singer; model 17, 21a, 22c).|
|Mineral deposit model number||17, 21a, 22c|
|Age of mineralization||Miocene or younger|
|Alteration of deposit||Sericitic and propylitic alteration and silicification have been mapped over an area of several square miles.|
|Indication of production||None|
Additional commentsSite is located in Katmai National Park.
Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p.
Church, S.E., Detterman, R.L., and Wilson, F.H., 1989, Mineral and energy resource assessment maps of the Ugashik, Bristol Bay, and western Karluk quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF 1539-I, 2 map sheets, scale 1:250,000.
Church, S.E., Frisken J.G., and Wilson, F.H., 1989, Interpretation of exploration geochemical data from Ugashik, Bristol Bay, and western Karluk quadrangles, Alaska: U.S Geological Survey Bulletin 1858, 45 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Karluk quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-459, 1 sheet, scale 1:250,000.
Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Afognak, Karluk, Kodiak, and Trinity Islands quadrangles, Alaska: U.S. Geological Survey Open-File Report 79-860, 49 p.
Detterman, R.L., Case, J.E., Wilson, F.H., and Yount, M.E., 1987, Geologic map of the Ugashik, Bristol Bay, and part of the Karluk quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-1685, 1 sheet, scale 1:250,000.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.
|Reporters||S.H. Pilcher (Anchorage)|
|Last report date||8/18/1998|