The Bureau of Mines investigated the occurrence and recovery of byproduct gold and heavy minerals from west coast sand and gravel operations. Heavy mineral (black sand) concentrates were prepared from sand samples from 150 locations. Magnetite, ilmenite, zircon, chromite, rutile, radioactive minerals, platinum-group minerals, and gold were identified in many of the concentrates. Individual magnetite, ilmenite, zircon, chromite, rutile, thoria, platinum- group minerals, and gold products were prepared from selected concentrates. Low- and high-intensity magnetic, electrostatic, flotation, and amalgamation techniques were used to beneficiate the black sands.
5th Annu. Conf. Alaskan Placer Mining, Miner. Ind. Res. Lab. Rep. No. 68, 1983, Pp. 49-52