|Quadrangle map, 1:250,000-scale||SO|
|Quadrangle map, 1:63,360-scale||D-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is near the crest of the Darby Mountains at approximately 2,675 feet elevation in the extreme eastern headwaters of Dry Canyon Creek. This locality is 0.7 miles north of Peak 2,883 and 1 mile southwest of Peak 3,273. It is locality 62 of Gamble (1988).|
Geologic descriptionThis prospect occurs in feldspathic schist near the western contact of Darby pluton granite. Sphalerite, galena, chalcopyrite, and pyrite have been identified (Miller and Grybeck, 1973). Stream sediment samples from the two drainages flowing west from this occurrence contained anomalous amounts of Pb in one case, and Pb and Zn in the other. The Darby pluton is a mid-Cretaceous granodiorite and granite; K/Ar ages for the Darby pluton are 88.3 +/- 1.5 and 92.8 +/- 2.6 Ma (Berry and others, 1976). The country rocks to the pluton here are high-grade metasedimentary rocks of Paleozoic or Precambrian age (Till and others, 1986).
|Geologic map unit||(-162.457597210525, 64.8622916330753)|
|Mineral deposit model||Base-metal sulfide veins or replacements in metasedimentary rocks.|
|Age of mineralization||Not known; probably mid-Cretaceous or younger. K/Ar ages for the nearby Darby pluton are 88.3 +/- 1.5 and 92.8 +/- 2.6 Ma (Berry and others, 1976).|
|Workings or exploration||No workings or exploration acitivities are known but regional stream sediment geochemical and airborne radiometric surveys may have been completed in the area.|
|Indication of production||None|
Berry, A.L., Dalrymple, G.B., Lamphere, M.A., and Von Essen, J.C., and others, 1976, Summary of miscellaneous potassium-argon age measurements, U.S. Geological Survey, Menlo Park, California, for the years 1972-1974: U.S. Geological Survey Circular 727, 13 p.
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||8/19/1999|