Riou Bay Occurrence, Yakataga Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Riou Bay Occurrence	Occurrence
Yakataga Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

Location: This occurrence is on the east shoreline of Point Riou Spit, on the west side of Riou Bay. It is in the SW1/4 section 22, T. 23 S., R. 23 E., of the Copper River Meridan. This is sample location 154 of Foley and others (1995).
Geology: Foley and others (1995) collected a beach sample at this location. Spiral concentrate from this sample contained 0.056 gram of gold per ton, 1.07 percent titamium, and 331 ppm zirconium. The heavy-mineral concentrate (12.28 weight percent of the original sample) contained 0.004 percent magnetite, 1.053 percent ilmenite, 0.092 percent garnet, 0.008 percent zircon, 0.007 percent rutile, and 11.12 percent other minerals. Thomas and Berryhill (1962) collected reconnaissance beach samples (IB004, IB006-010) from the Icy Bay area that contained trace to small amounts of magnetite, ilmenite, chromite, zircon, rutile, garnet, sphene, xenotime, and gold. The magnetic fraction of their samples contained as much as 6.2 pounds of iron and 1 pound of titanium oxide per cubic yard. The non-magnetic fraction contained as much as 6.4 pounds, but mostly less than 2 pounds, of titanium oxide per cubic yard.
Workings: Reconnaissance characterization of beach samples has been completed in this area.
Age: Holocene.

Commodities (Major) - Au, Ti; (Minor) - Cr
Development Status: None
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a - beach)

Other Databases

Link to USGS - Alaska:	IB005

Other Regions, Features and Areas containing this locality

References