|Quadrangle map, 1:250,000-scale||EA|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Ruby Creek is a 10-mile-long wesy tributary of Slate Creek. The occurrence is located near the mouth of Ruby Creek, in section 29, T. 3 S., R. 25 E., of the Fairbanks Meridian. The location is accurate within one-half mile. Ruby Creek is locality 41 of Cobb (1972 [MF-393]).|
Geologic descriptionThe rocks in the vicinity of Ruby Creek are granitic rocks of probable Mesozoic age, Tertiary felsic igneous rocks, and Paleozoic schist, greenschist, quartzite, and marble (Foster, 1976). Biotite from the Ruby Creek granite gives a 40Ar/39Ar plateau age of 102.1 +/- 0.4 Ma (Newberry and others, 1996). Monazite and allanite were found in heavy-mineral concentrates at the mouth of Ruby Creek in 1949 during a reconnaissance for radioactive deposits (Wedow and others, 1954). The source of the monazite and allanite is presumably granitic rocks in the drainage.
|Geologic map unit||(-142.757914095466, 64.631656946015)|
|Workings or exploration||Monazite and allanite were found in heavy mineral concentrates at the mouth of Ruby Creek in 1949 during a reconnaissance for radioactive deposits (Wedow and others, 1954).|
|Indication of production||None|
Cobb, E.H., 1972, Metallic mineral resources map of the Eagle quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-393, 1:250,000 scale, 1 sheet.
Cobb, E.H., 1977, Summary of references to mineral occurrences in the Eagle quadrangle, Alaska: U.S. Geological Survey Open-File Report 77-845, 122 p.
Newberry, R.J., Layer, P.W., Burleigh, R.E., and Solie, D.N., 1996, New 40Ar/39Ar dates for intrusions and mineral prospects in the eastern Yukon-Tanana terrane, Alaska - Regional patterns and significance, in Gray, J.E., and Riehle, J.R., eds., Geological Studies in Alaska by the U.S. Geological Survey, 1996: U.S. Geological Survey Professional Paper 1595, p. 131-159.
|Reporters||R.L. Flynn; M.B. Werdon|
|Last report date||5/1/2002|