|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||C.C. Hawley and Associates, Inc. (1978, Fig. 4.2-(3)) show this lode claim group covering most of the headwater basin of the south fork of upper Nugget Creek in the southwest quarter of Section 33, T. 29 N., R. 9 W., of the Seward Meridian.|
Upper Nugget Creek drains an area underlain by Mesozoic argillite and graywacke cut by a roughly circular, Tertiary (?) felsite porphyry body about 200 feet in diameter (Clark and Hawley,1968). Minor gold values have been returned from thin, sparsely distributed quartz-arsenopyrite veinlets which cut the porphyry. The veinlets are weakly mineralized at about 0.04 ppm gpld. Gold also occurs very sparsely on the joint surfaces of the rocks (Clark and Hawley, 1968).See also Bradley Scheelite; Bird Creek (TL036).
|Geologic map unit||(-150.98428866741, 62.5604777764001)|
|Mineral deposit model||Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a).|
|Mineral deposit model number||36a|
|Age of mineralization||Tertiary (Clark and Hawley, 1968).|
|Alteration of deposit||Silicification (quartz veining) (Clark and Hawley,1968).|
|Workings or exploration||Workings consist of two short adits and a shallow prospect pit (Clark and Hawley, 1968).|
|Indication of production||None|
Additional commentsAlso see Bradley Scheelite; Bird Creek (TL036).
C.C. Hawley and Associates, Inc., 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska: U.S. Bureau of Mines Open-File Report 24-78, 277 p., 12 sheets.
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.
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|