Deposit

Tofty Ridge

Tofty Ridge 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 (65.116, -150.810 approx.)

Commodities: rare earth elements; niobium; silver; uranium; gold; tin

Deposit model: alluvial placer Sn · carbonatite · carbonatite deposits · unclassified

Geology

Minerals in the pebble-size or sand-size concentrate, besides those mentioned above, include picotite (chrome spinel), zircon, aeschynite (niobate and titanate, chiefly of cerium metals), monazite, xenotime, apatite, epidote, brookite, anatase, barite, garnet, titanite, andalusite, and hypersthene. (Wayland (1961))

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