Unnamed (south of Inland Lake)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Th; U
Ore minerals radioactive minerals
Gangue minerals fluorite

Geographic location

Quadrangle map, 1:250,000-scale SE
Quadrangle map, 1:63,360-scale B-2
Latitude 66.328
Longitude -159.739
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 100 feet about 5 miles south of Inland Lake. This site is in the SW1/4 section 21, T. 11 N., R. 5 W., of the Kateel River Meridian. Barker (1985), figure 7, anomalous area 4.

Geologic setting

Geologic description

The country rocks in the area of this occurrence consist of the Cretaceous Inland Lake alkaline intrusive complex. The occurrence consists of locally abundant purple fluorite as matrix and breccia filling in syenite rubble. The fluorite is similar to that associated with the radioactive zones near VABM Saturday at the Uranium 2 and 3 occurrences (ARDF number SE005 and SE006) (Barker, 1985). A sample of fluorite-bearing pulaskite, possibly a dike, from the Inland Lake alkaline complex contained 31 ppm U and 178 ppm Th, but no radioactive minerals or alteration zones were identified.
Geologic map unit (-159.741722056314, 66.3273740427652)
Mineral deposit model Radioactive minerals in fluorite-bearing pulaskite.
Age of mineralization Cretaceous.

Production and reserves

Workings or exploration The site was visited briefly and sampled by U.S. Bureau of Mines in 1984.
Indication of production None

Additional comments

The occurrence is located within the Selawik National Wildlife Refuge.

References