|Quadrangle map, 1:250,000-scale||SP|
|Quadrangle map, 1:63,360-scale||C-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This site is a composite of three occurrences (localities 23-25 of Grybeck and Nelson, 1981) in an area of about 10 square miles north of the Noatak River and south of Mt. Papiok. The coordinates are for the center of an area, in sec. 22, T. 25 N., R. 17 E., of the Kateel River Meridian. Location of area accurate to within 2000 ft.|
Geologic descriptionThe occurrences at the site are contact-metamorphic deposits in Paleozoic phyllite and limestone over a dome of Devonian gneissic granite that is exposed on the north bank of the Noatak River. Three small mineral occurrences have been documented (Grybeck and Nelson, 1981). They include quartz vein rubble and skarn containing various combinations of ore minerals including galena, chalcopyrite, pyrrhotite, and sphalerite. Select samples contain up to 480 ppm Ag, 3.5 ppm Au, 5,000 ppm As, 150 ppm Be, 150 ppm Bi, and 100 ppm Sn. The occurrences are similar to those at SP009, and to other contact metamorphic deposits elsewhere in the Brooks Range (Newberry and others, 1986).
|Geologic map unit||(-155.012782852538, 67.5494985418381)|
|Mineral deposit model||Skarn (Cox and Singer, 1986; model 14b)|
|Mineral deposit model number||14b|
|Age of mineralization||Related to the intrusion of the Devonian pluton.|
|Alteration of deposit||Quartz and calc-silicate minerals.|
|Workings or exploration||Samples were mostly collected during spot stops and short traverses during geologic mapping by the USGS in the late 1970s.|
|Indication of production||None|
Additional commentsLocated within Gates of the Arctic National Park.
Garland, R.E., Eakins, G.R., and Trible, T.C., 1975, Geochemical analysis of rock and stream-sediment samples from Survey Pass C-5 quadrangle: Alaska Division of Geological and Geophysical Surveys Open-File Report AOF-64, 4 p., 2 sheets, scale 1:63,360.
Grybeck, D.J., and Nelson, S.W., 1981, Mineral deposit map of the Survey Pass quadrangle, Brooks Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1176-F, 1 sheet, scale 1:250,000.
Newberry, R.J., Dillon, J.T., and Adams, D.D., 1986, Regionally metamorphosed calc-silicate-hosted deposits of the Brooks Range, northern Alaska: Economic Geology, v. 81, p. 1728-1752.
|Reporters||S.W. Nelson (Anchorage, Alaska)|
|Last report date||9/20/1999|