|Quadrangle map, 1:250,000-scale||EA|
|Quadrangle map, 1:63,360-scale||A-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is located on the ridge between Buckskin Creek and Franklin Creek, about 3.9 miles west-northwest of the old town of Franklin and about 0.3 mile north of hill 3125. The coordinates are in section 36, T. 8 S., R. 29 E., of the Fairbanks Meridian. The location is accurate.|
Geologic descriptionThe rocks in the vicinity of this occurrence are primarily interlayered Paleozoic amphibolite-facies paragneiss, amphibole-feldspar gneiss, and amphibolite (Werdon and others, 2001). These units have been intruded by small, slightly foliated, Jurassic granitic plutons and dikes and widely-scattered Jurassic biotite clinopyroxenite dikes. The metamorphic rocks adjacent to the granitic intrusions have been hornfelsed and are cut by sparse quartz and limonite veins. An assay of these veins contains 504 ppm zinc. A garnet-quartz skarn with disseminated limonite (pseudomorphs after unknown sulfide) contains 850 ppm zinc (Werdon and others, 2000).
|Geologic map unit||(-141.907989152277, 64.1767700889288)|
|Mineral deposit model||Zinc skarn.|
|Age of mineralization||Probably Jurassic.|
|Alteration of deposit||Hornfelsing and calc-silicate alteration of gneiss.|
|Indication of production||None|
Werdon, M.B., Newberry, R.J., and Szumigala, D.J., 2001, Bedrock geologic map of the Eagle A-2 quadrangle, Fortymile mining district, Alaska: Alaska Division of Geological and Geophysical Surveys Preliminary Interpretive Report 2001-3b, 1sheet, scale 1:63,360.
Werdon, M.B., Szumigala, D.J., Newberry, R.J., Grady, J.C., and Munly, W.C., 2000, Major oxide, minor oxide, trace element, rare-earth element, and geochemical data from rocks collected in Eagle and Tanacross quadrangles, Alaska in 2000: Alaska Division of Geological and Geophysical Surveys Raw-Data File 2000-4, 27 p., 3 sheets, scale 1:63,360.
|Last report date||5/1/2002|