Quadrangle map, 1:250,000-scale | SO |
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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 descriptionA 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) |
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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). |
Indication of production | None |
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MRDS Number | D002605 |
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References | |
Reporters | Travis L. Hudson (Applied Geology) |
Last report date | 8/19/1999 |