|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||Coordinates given here locate one of the two anomalous stream sediment sites described as the Mt. Goldie anomaly by Clark and Hawley (1968, Figure 2, no. 56). They report that the anomaly encompasses an area in Sections 31 and 32, T. 31 N., R. 8 W. and Sections 7 and 8, T. 30 N., R.8 W., of the Seward Meridian. The area lies within Denali National Park and Preserve.|
Clark and Hawley (1968) describe the Mount Goldie silt anomaly as underlain by Mesozoic graywacke, quartzite and argillite (KJs) that are cut by Tertiary(?) aplite dikes and auriferous quartz veins. One rusty-weathering dike, about 3 feet wide, contains pyrite and arsenopyrite with minor gold. The aplite dikes may be related to the early Tertiary Kahiltna pluton (Tmk, Reed and Nelson, 1980) about four miles to the northwest. Two stream silt samples from streams draining this area contained 0.2 and 0.3 ppm gold, respectively (Clark and Hawley, 1968, Figure 2, no. 56).Stream sediment samples with elevated Au, As, Be, Co, Cu, Cr, Nb, Pb, Sn, and Zn values from four streams in the area between the Tokositna and Kahiltna Glaciers indicate the area is auriferous and could host mineralized prospects (Clark and Hawley, 1968). See Rocky Cummins (TL016).
|Geologic map unit||(-150.842285036508, 62.7294830315627)|
|Mineral deposit model||Possibly 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||Reconnaissance mapping, stream silt and rock sampling are all that have been done here. Two stream sediment samples from drainages in this area contained 0.2 and 0.3 ppm gold, respectively (Clark and Hawley, 1968).|
|Indication of production||None|
Additional commentsThe area lies within Denali National Park and Preserve.
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.
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|