Uranium 3 Prospect (in Selawik Hills), Selawik Mining District, Northwest Arctic Borough, Alaska, USAi

Regional Level Types
Uranium 3 Prospect (in Selawik Hills)	Prospect
Selawik Mining District	Mining District
Northwest Arctic Borough	Borough
Alaska	State
USA	Country

Location: This prospect is at an elevation of about 950 feet in the SE1/4 section 31, T. 9 N., R. 9 W., of the Kateel River Meridian. Barker (1985), figures 7, 8, location C, sample 23-R
Geology: The country rock in the area of this prospect is the mid-Cretaceous Selawik Hills alkaline intrusive complex. The prospect is one of several areas of anomalous radioactivity within the complex. At this location, a zone of altered porphyritic hornblende syenite contains accessory to minor amounts of zircon, xenotime, sphene, epidote, fluorite, goethite and an unidentified red, waxy mineral. The zone is over 10 feet wide and 100 to 250 feet long. Rock sample 23R contained 734 ppm U3O8, 875 ppm Th, and 535 ppm Nb. Emission spectrographic analysis of a split of this sample indicates 0.01% La, 0.1% Nb, 0.005% Y, and 1.0% Zr. A diamond drill hole is located to the southwest of the sample site (Barker, 1985).
Workings: Shallow prospect pits and at least 2 drill holes are evidence of earlier exploration. The exploration apparently took place in the mid-1970's and may have been more extensive than is evident. No information is available on that exploration (Barker, 1985).
Age: Cretaceous.
Alteration: An unidentified red, waxy mineral is altered to goethe and limonite.

Commodities (Major) - Th, U; (Minor) - Nb, Y
Development Status: None
Deposit Model: Disseminated radioactive minerals in syenite.

Other Databases

Link to USGS - Alaska:	SE006

Other Regions, Features and Areas containing this locality

References