|Quadrangle map, 1:250,000-scale||PM|
|Quadrangle map, 1:63,360-scale||D-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The map site of this occurrence is located on the Alaska Peninsula on the east shore of Right Head on Port Moller (Berg and Cobb, 1967, locality 4; Cobb, 1972 [MF 433], locality 1; MacKevett and Holloway, 1977, locality 1; Wilson and others, 1988, locality 1). It is in the NW1/4 of sec. 3, T. 51 S., R. 71 W., of the Seward Meridian. The location is accurate to 1,200 feet.|
Geologic descriptionRocks at this site consist of undivided Tertiary volcanic strata (Wilson and others, 1995). Atwood (1911) first described this occurrence as a series of basaltic lava flows that are altered to a brillant yellow color. His samples contained no gold. Trujillo and others (1982) mention intrusive plugs or stocks. They describe the rocks as heavily pyritized and they found gold in pan concentrates in six drainages. The rock samples they collected contained no gold. Mapping in the 1980s by the U.S. Geological Survey indicated a series of andesite flows and lahars whose basal units are hydrothermally altered (Wilson and others, 1988). Their rock geochemical samples locally contained anomalous amounts of lead and copper.
|Geologic map unit||(-160.268023034132, 55.7821836692912)|
|Age of mineralization||Tertiary.|
|Alteration of deposit||The brillant yellow color described by Atwood (1911) is probably due to the weathering of pyrite, producing iron oxides and clay.|
|Workings or exploration||Some staking was carried out here in the early 1900s, but no development work was ever reported. Atwood took some samples in 1911. Resource Associates of Alaska sampled here in 1982, and the U.S. Geological Survey mapped and sampled the area in the mid-1980s.|
|Indication of production||None|
Additional commentsThis site is located near the boundary between land selected by the Aleut Corporation and State-selected wildlife, park, forest, or other multiple-use areas.
Atwood, W.W., 1911, Geology and mineral resources of parts of the Alaska Peninsula: U.S. Geological Survey Bulletin 467, 137 p.
Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Port Moller quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-443, 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.
Trujillo, R.S., Tapper, C.J., Alvarez, T.J., Porterfield, Ben, and Toupe, W.M., 1982, Exploration and evaluation of precious metal potential of portions of Aleut Corporation lands, southwest Alaska 1982: Resource Associates of Alaska unpublished report, 91 p, 33 maps, 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., 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||12/22/2000|