|Quadrangle map, 1:250,000-scale||SM|
|Quadrangle map, 1:63,360-scale||D-7|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on a north-northeast trending ridge separating the headwaters of Getmuna Creek on the east from tributaries of the Kolmakof River on the west. It is near hill 1666, about 0.4 mile south of the center of section 30, T. 20 N., R. 51 W., of the Seward Meridian. The location is accurate.|
Geologic descriptionThis occurrence consists of quartz-bearing ferricrete breccia in vitreous mafic volcanic flows of the Upper Cretaceous, Horn Mountains volcanic rocks (Bundtzen and others, 1998). The mineralized zone trends north-south for a distance of about 1,100 feet. One grab sample of the ferricrete breccia contained 610 parts per million (ppm) zinc, 210 ppm nickel, 1,000 ppm chromium, 45 ppm cobalt, and 22 ppm bismuth (Bundtzen and others, 1998). The elevated zinc and bismuth values are probably hydrothermal in origin whereas the high chromium, nickel, and cobalt values probably represent background in the mafic-volcanic host rocks.
|Geologic map unit||(-158.598179523482, 61.7877144975543)|
|Mineral deposit model||Polymetallic vein (Cox and Singer, 1986; model 22c).|
|Mineral deposit model number||22c|
|Age of mineralization||Undated; may be related to the nearby Horn Mountain pluton which has been dated at 68-69 Ma (Bundtzen and others, 1998).|
|Workings or exploration||Surface sampling was conducted in 1992 by the Alaska Division of Geological and Geophysical Surveys (Bundtzen and others, 1998).|
|Indication of production||None|
Bundtzen, T.K., Harris, E.E., Miller, M.L., Layer, P.W., and Laird, G.M., 1998, Geology of the Sleetmute C-7, C-8, D-7, and D-8 quadrangles, Horn Mountains, southwestern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 98-12, 38 p., one sheet, scale 1:63,360.
|Reporters||T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.) and M.L. Miller (U.S. Geological Survey)|
|Last report date||5/6/2003|