Recherche dans la collection - Relevé avec un magnétomètre

Titre fondé sur la légende suivante tirée du photoreportage de l'ONF: Though extensive exploration in the Oka area has proven up large quantities of columbium-bearing ore, the search for this jet-age metal has extended to Great Slave Lake, where columbite ores are to-day being processed in a 125-ton a day capacity mill. Columbium stands at head of scarce metal list, and its rarity, has kept prices high; pure columbium metal powder commands $119 a pound. Magnetometer survey is shown being carried out in St. Joseph du Lac area, near Oka. P.Q.