|Quadrangle map, 1:250,000-scale||JU|
|Quadrangle map, 1:63,360-scale||A-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of approximately 1,600 feet, 4.5 miles southeast of Eagle Peak, 3.5 miles south of Young Lake, and 3 miles west of the Salmon River. It is in the SE1/4 section 9, T. 44 S., R. 67 E. of the Copper River Meridian. The location is accurate within 1/4 mile.|
This prospect consists of pegmatite veins in granite, migmatite, and contact-metamorphic rocks. X-ray spectroscopic analysis of heavy mineral concentrates from samples of the pegmatite veins indicate the presence of yttrium, zirconium, niobium, thorium, lanthanum, cerium, praseodymium and neodymium (Lathram and others, 1965). Wells and others (1986) show active claims at this site in 1985.The rocks in the general area are Upper Jurassic to mid-Cretaceous, marine argillite and graywacke, interbedded with andesitic to basaltic volcanic and volcaniclastic rocks, and subordinate polymictic conglomerate. The rocks are intruded by Cretaceous plutons, including granodiorite, quartz diorite, dunite, and peridotite (Gehrels and Berg, 1994).
|Geologic map unit||(-134.460267669185, 58.0667649188695)|
|Workings or exploration||Surface sampling only.|
|Indication of production||None|
Gehrels, G.E., and Berg, H.C., 1994, Geology of southeastern Alaska, in Plafker, George, and Berg, H. C., eds., The geology of Alaska: Geological Society of America, DNAG, The geology of North America, Vol. G-1, p. 451-467.
Lathram, E.H., Pomeroy, J.S., Berg, H.C., and Loney, R.A., 1965, Reconnaissance geology of Admiralty Island, Alaska: U.S. Geological Survey Bulletin 1181-R, p. R1-R48.
|Reporters||J.C. Barnett and L.D. Miller (Juneau, Alaska )|
|Last report date||12/15/2001|