|Quadrangle map, 1:250,000-scale||TL|
|Quadrangle map, 1:63,360-scale||C-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Reed and others (1978, locality 18) show this occurrence approximately at the toe of a glacier at the 3000 foot elevation mark in the northeast quarter of Section 14, T. 28 N., R. 7 W., of the Seward Meridian within Denali National Park and Preserve.|
Pan concentrates containing visible gold are reported at this site by Reed and others (1978).The area is underlain by Mesozoic marine sedimentary rocks (KJs) that have been intruded by the Upper Yentna pluton, a 65 to 66 m.y. old intrusive body that is one of the composite plutons (Tcp) described by Reed and Nelson (1980). These composite plutons form a 65-km-long curvilinear belt from Mt. Estelle in the south to Cascade Creek in the northeast. Anomalous gold, platinum-group elements, copper, chrome, nickel and arsenic are reported from these plutons (Reed and others, 1978; Reed and Nelson, 1980; Nelson and others 1992; Foley and others, 1997). Gold and platinum group element placers have been worked at sites downstream from these bodies (Mertie, 1919; Cobb, 1973). The occurrence lies near the convergent margin that places Paleozoic rocks over younger Mesozoic rocks (KJs) (Reed and Nelson, 1980). See also TL020, TL023, TL052, and TL053.
|Geologic map unit||(-152.370226623357, 62.5214359182892)|
|Mineral deposit model||Placer Au-PGE (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Pleistocene.|
|Workings or exploration||Reconnaissance mapping, prospecting, stream silt, pan concentrate and rock sampling are all that have been done here. Pan concentrates containing visible gold are reported at this site by Reed and others (1978). Anomalous gold, platinum-group elements, copper, chrome, nickel and arsenic are reported from these plutons (Reed and others, 1978; Reed and Nelson, 1980; Nelson and others 1992; Foley and others, 1997). Gold and platinum group element placers have been worked at sites downstream from these bodies (Mertie, 1919; Cobb, 1973).|
|Indication of production||None|
Additional commentsThis site is located within Denali National Park and Preserve.
Cobb, E.H., and Reed, B.L., 1980, Summaries of data on and lists of reference to metallic and selected nonmetallic mineral deposits in the Talkeetna quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-884, 106 p.
Foley, J.Y., Light, T.D., Nelson, S.W., and Harris, R.A., 1997, Mineral occurrences associated with mafic-ultramafic and related alkaline complexes in Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 396-449.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
Mertie, J.B., Jr., 1919, Platinum-bearing gold placers of the Kahiltna Valley, in Martin, G.C., and others, Mineral resources of Alaska, report on progress of investigations in 1917: U.S. Geological Survey Bulletin 692, p. 233-264.
|Reporters||Madelyn A. Millholland (Millholland & Associates)|
|Last report date||8/10/1998|