Point Riou (near Icy Bay)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Ti
Other commodities Cr
Ore minerals chromite; ilmenite; gold; magnetite; rutile
Gangue minerals garnet; sphene; xenotime; zircon

Geographic location

Quadrangle map, 1:250,000-scale IB
Quadrangle map, 1:63,360-scale D-2
Latitude 59.8769
Longitude -141.4217
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the present Gulf of Alaska shoreline, 1.2 miles southeast of Point Riou and the mouth of Icy Bay. The occurrence, in section 2, T. 24 S., R. 23 E., of the Copper River Meridian, is locality 6 of Cobb (1972 [MF 411]; 1979 [OF 79-1246]).

Geologic setting

Geologic description

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. An auger sample of beach material collected by Thomas and Berryhill (1962) at this location contained 0.2 pound of titanium oxide per cubic yard in the magnetic fraction (which also contained 1.4 pounds of iron per cubic yard) and 1.5 pounds of titanium oxide per cubic yard in the non-magnetic fraction.
Geologic map unit (-141.423424054019, 59.8764930665444)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a - beach).
Mineral deposit model number 39a
Age of mineralization Holocene.

Production and reserves

Workings or exploration Reconnaissance characterization of beach samples has been completed in this area.
Indication of production None


MRDS Number 10307627
Reporters Travis L. Hudson
Last report date 12/12/2001