Deposit

Unnamed (on Slate Creek)

Unnamed (on Slate Creek) is a rare earth occurrence in Alaska, recorded in the USGS USMIN rare earth element occurrence database (ver. 4.0, June 2019).

Facts on this page last re-verified Aug 12, 2026 — the oldest verification date among its current claims. How we verify.

Location: Alaska, United States (64.679, -142.715 approx.)

Commodities: rare earth elements; thorium; uranium

Deposit model: REE-Th bearing veins · Th-REE veins

Geology

Rocks consist of pre-Middle Ordovician clastic sedimentary rocks, intruded by Mesozoic granite; nearby area pf porphyritic rhyolite may be border phase of the granite or possibly Tertiary rhyolite. (Wedow and White (1954))

Exploration and site history

Discovery — Monazite and allanite found in panned concentrates from upper Slate Creek, just above the mouth of Ben Creek, during a reconnaissance for radioactive deposits, 1949 (Wedow and White (1954))

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

Sources

U.S. Geological Survey · published Jun 1, 2019 · retrieved Aug 12, 2026 · archive unavailable: Wayback snapshot 20260427015518 of the ScienceBase item exists but the archive service returned 503 on verification 2026-08-12; recheck on a weekly pass