Golovnin Bay

Occurrence, Inactive

Commodities and mineralogy

Main commodities REE; U; W
Ore minerals scheelite; uranium-titanium-niobate
Gangue minerals allanite; biotite; hematite; hornblende; ilmenite; magnetite; sphene

Geographic location

Quadrangle map, 1:250,000-scale SO
Quadrangle map, 1:63,360-scale C-2
Latitude 64.52
Longitude -162.92
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the northeast coast of Golovin Bay where outcrops of the Kachauik pluton are exposed (Till and others, 1986). This location is about 0.3 miles north of a coastal light and 1.5 miles northwest of the mouth of McKinley Creek. It is locality 135 of Cobb (1972, MF 445; 1978, OF 78-181); it is probably located within 0.5 mile.

Geologic setting

Geologic description

A heavy mineral concentrate from slope wash over intrusive rocks of the Kachauik pluton contained 0.074% equivalent uranium, primarily in an unidentified uranium-titanium-niobate mineral (West, 1953, p. 4). Other minerals identified in the heavy mineral concentrate included allanite, biotite, hematite, hornblende, ilmenite, magnetite, scheelite, and sphene. Most of these are probably accessory minerals in monzonite/syenite of the Kachauik pluton (Miller and others, 1972; Miller, 1972). However, parts of this pluton along nepheline syenite dikes locally contain up to 0.15% U3O8, 1.05% Th, and 2% REE (Miller and others, 1976). A K/Ar age for the Kachauik pluton is 99.9 +/- 3 Ma (Miller and Bunker, 1976).
Geologic map unit (-162.922585642889, 64.5192682420832)
Mineral deposit model Disseminated; heavy minerals in slope wash close to their source in intrusive rocks of the Kachauik pluton.
Age of mineralization Mid-Cretaceous; a K/Ar age for the Kachauik pluton is 99.9 +/- 3 Ma (Miller and Bunker, 1976).

Production and reserves

Indication of production None