Unnamed (near Salmon River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Nb; Th; Zr
Other commodities REE (Ce; La; Nd; Pr; Y)

Geographic location

Quadrangle map, 1:250,000-scale JU
Quadrangle map, 1:63,360-scale A-2
Latitude 58.0671
Longitude -134.4585
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.

Geologic setting

Geologic description

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)

Production and reserves

Workings or exploration Surface sampling only.
Indication of production None


MRDS Number A012082


Reporters J.C. Barnett and L.D. Miller (Juneau, Alaska )
Last report date 12/15/2001