|Quadrangle map, 1:250,000-scale||TL|
|Quadrangle map, 1:63,360-scale||C-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Clark and Hawley (1968) locate this prospect 4.5 miles southeast of Mt. Goldie at about 2900 feet elevation in the southwest quarter of Section 5, T. 30 N., R. 8 W., of the Seward Meridian within Denali National Park and Preserve. Also shown as locality 45 in Reed and others (1978) and locality 15 in Hawley and Clark (1973) in a southeasterly flowing tributary about three miles upstream on the west side of the Tokositna Glacier.|
Mesozoic graywacke and argillite (KJs, Reed and Nelson, 1980) host steeply dipping, N75W striking, quartz veins in a 30 -foot-wide zone. Minor sporadic gold values occur within this zone, along with traces of silver, bismuth and tin (Cobb and Reed, 1980). Quartz is milky white, locally vuggy with minor pyrite, arsenopyrite, an unidentified gray-brown metallic mineral, white mica and free gold (Clark and Hawley, 1968; Hawley and Clark, 1973). The veins may be related to the Tertiary Kahiltna pluton (Tmk) mapped by Reed and Nelson (1980) to the northwest.
Clark and Hawley (1968) report samples containing 0.02 to 1.4 ppm Au, up to 20 ppm Ag, with anomalous As, Bi, Sn and W.Stream sediment samples from four streams in the area between the Tokositna and Kahiltna Glaciers indicate the area is auriferous and could host other prospects (Clark and Hawley, 1968). See TL015.
|Geologic map unit||(-150.828285445153, 62.717483314563)|
|Mineral deposit model||Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a).|
|Mineral deposit model number||36a|
|Age of mineralization||Tertiary; mineralization is interpreted to be linked to the Kahiltna pluton (Tmk), part of the McKinley Sequence, that has been determined to range from 52.3 to 56.2 m.y. in age by K/Ar method (Reed and Lanphere, 1972; Reed and Nelson, 1980).|
|Workings or exploration||Some small prospect pits and reconnaissance mapping, stream silt and rock sampling (Clark and Hawley, 1968) are all that have been done here. Clark and Hawley (1968) report samples containing 0.02 to 1.4 ppm Au, up to 20 ppm Ag, with anomalous As, Bi, Sn and W.|
|Indication of production||None|
Additional commentsThis prospect lies within Denali National Park and Preserve.
Clark, A.L., and Cobb, E.H., 1972, Metallic mineral resources map of the Talkeetna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-369, 1 sheet, scale 1:250,000.
Clark, A.L., and Hawley, C.C., 1968, Reconnaissance geology, mineral occurrences, and geochemical anomalies of the Yentna district, Alaska: U.S. Geological Survey Open-File Report 68-35, 64 p.
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.
Hawley, C.C., and Clark, A.L., 1973, Geology and mineral deposits of the Chulitna -Yentna mineral belt, Alaska: U.S. Geological Survey Professional Paper 758-A, p. A1-A10, 2 plates, scale 1:250,000 and 1:500,000.
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.
Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle: U.S. Geological Survey Miscellaneous Investigations Map I-1174, 1 sheet, scale 1:250,000.
|Reporters||Madelyn A. Millholland (Millholland & Associates)|
|Last report date||8/10/1998|