|Quadrangle map, 1:250,000-scale||CH|
|Quadrangle map, 1:63,360-scale||A-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is at an elevation of about 1,350 feet ft on a major west headwater tributary of Granite Creek that flows through the east half of section 4, T. 25 N., R. 11 W. The location is accurate to within about a mile.|
Geologic descriptionLittle is known about this prospect other than that 5 claims were active in this area from 1967 to 1969 and that a suction dredge was in operation in 1969 (DeYoung, 1978). The rocks in the area are Devonian(?) andesite, diorite, and chert adjacent to a large body of of upper Paleozoic or Mesozoic granitic rock (Brosgé and Reiser, 1964). Kurtak and others (2002) investigated the area. None of their panned concentrates showed gold; a float sample of hornfels had a trace of chalcopyrite and assayed 199 ppm copper.
|Geologic map unit||(-149.971400959367, 67.0222657916364)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Little is known about this prospect other than that 5 claims were active in this area from 1967 to 1969 and that a suction dredge was in operation in 1969 (DeYoung, 1978).|
|Indication of production||Undetermined|
|Production notes||Possibly some.|
Additional commentsMAS No. 0020310116
DeYoung, J.H., Jr., 1978, Mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-878-B, 2 sheets, scale 1:250,000.
Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, northern Alaska, 2 vols.: Bureau of Land Management, Alaska Technical Report 50, 845 p.
|Reporters||J.M. Britton (Anchorage, Alaska); D.J. Grybeck (Contractor, U.S. Geological Survey)|
|Last report date||4/18/2010|