Kilolitna River

Location: Alaska, United States (65.953, -151.204 approx.)

Commodities: rare earth elements; tin; niobium; tungsten; tantalum; zirconium

Deposit model: alluvial placer Sn · unclassified

Geology

The first segment, shown in figure 5, is the lower end of a broad alluvial outwash deposit. The outwash deposit is approximately 0.25 mile wide and is bordered by terraced alluvial deposits. This lower segment contains the largest alluvial gravel deposits within the east fork valley and yielded some of the higher tin values (up to 0.404 lb/yd3 Sn from sample 7). (Barker and Foley (1986))

Exploration and site history

• Exploration — In 1978 through 1980, the Bureau of Mines collected a series of 514 panned concentrates from selected granitic regions along a section of the Trans-Alaska pipeline corridor, bounded on the south by Livengood and on the north by the Koyukuk River, 1978–1980 (Barker (1983))

Record imported from USGS USMIN ver. 4.0 (June 2019). Developments after that date appear on facility records, not here; see the methodology.