|Quadrangle map, 1:250,000-scale||TL|
|Quadrangle map, 1:63,360-scale||C-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Reed and others (1978, locality 42) show this occurrence in the headwater basin of Hidden Creek in the southeast quarter of Section 28, T.30 N., R.10 W., of the Seward Meridian in Denali National Park and Preserve.|
Geologic descriptionIn the headwater basin of Hidden Creek cassiterite occurs in quartz- tourmaline-muscovite veins that cut biotite granite of the early Tertiary Kahiltna pluton (Tmk) (Reed and others, 1978; Reed and Nelson, 1980).
|Geologic map unit||(-151.153291596721, 62.6574737268231)|
|Mineral deposit model||Sn Veins (Cox and Singer, 1986; model 15b).|
|Mineral deposit model number||15b|
|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).|
|Alteration of deposit||Quartz-muscovite-tourmaline assemblage is developed associated with the Sn-bearing veins (Reed and others, 1978).|
|Workings or exploration||Reconnaissance mapping, stream silt and rock sampling by the U.S. Geological Survey (Reed and others, 1978; Reed and Nelson, 1980) have been done here. Cassiterite occurs in quartz-tourmaline-muscovite veins (Reed and others, 1978; Reed and Nelson, 1980).|
|Indication of production||None|
Additional commentsThis occurrence lies 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.
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 Lanphere, M.A., 1972, Generalized geologic map of the Alaska-Aleutian range batholith showing potassium-argon ages of the plutonic rocks: U.S. Geological Survey Miscellaneous Field Studies Map MF-372, 2 sheets, 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|