|Quadrangle map, 1:250,000-scale||BN|
|Quadrangle map, 1:63,360-scale||A-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on the ridge crest (approximate 1,850 feet elevation) on the north side of the headwaters of North Fork, Mosquito Creek. Mosquito Creek flows westward from headwaters in the northern Darby Mountains to Telephone Creek, a tributary to Fish River in McCarthy's Marsh. It is approximately the location of sample localities 5 and 6 of Miller and Grybeck (1973). Gamble (1988) showed these as locations 50 and 51.|
Geologic descriptionTwo samples of apparently small, iron-stained zones in metamorphosed carbonate rocks were collected by Miller and Grybeck (1973) near this location. A composite grab sample of iron-stained carbonate contained 70 ppm Ag, 2,000 ppm As, 0.1 ppm Au, 200 ppm Cu, greater than 20,000 ppm Pb, 700 ppm Sb, 500 ppm Sn, and 7,000 ppm Zn. A grab sample of gossan in calcareous metasedimentary rock contained 3 ppm Ag, 3,000 ppm As, 200 ppm Cu, 70 ppm Mo, 1,500 ppm Pb, and greater than 10,000 ppm Zn. These occurrences are in lower Paleozoic metasedimentary rocks (Till and others, 1986).
|Geologic map unit||(-162.602619567073, 65.0892950662664)|
|Mineral deposit model||Sulfide veins and/or replacements in carbonate rocks|
|Age of mineralization||Cretaceous ?; Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.|
|Alteration of deposit||These occurrences are oxidized, gossanous zones in metacarbonate rocks.|
|Workings or exploration||None are known, some shallow hand dug prospecting pits may be locally present in this area.|
|Indication of production||None|
Gamble, B.M., 1988, Non-placer mineral occurrences in the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1838-B, 13 p., 1 sheet, scale 1:250,000.
Miller, T.P., and Grybeck, D.J., 1973, Geochemical survey of the eastern Solomon and southeastern Bendeleben quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 73-189, 115 p.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||3/15/1999|