Concentrations of the trnce elements iron. cobalt. nickel. copper, zinc, cadmium, and lead were measured in samples collected from the waters of the Gulf of Sr. Lawrence. Cobalt, cztdmii~m, and lead occurred at or beIow rhe delection limits of the analytical method. The mean concentrations of nickel, copper, and zinc were 0.4 rgl-'. 0.6 figl-' and 1.8 rgl-l respectively, and there was no evidence that local conditions influence their distrihution. The distribution of dissolved and colloid:tl iron is related to dilution and precipitation processes which occur as fresh and saline waters are mixed. The particulate iron distribution is largely governed by water circulation patterns and settling. Les concentrations des 616ments en trace, fer, cobalt, nickel, cuivre, zinc, cadmium, et plomb, dans des Cchantillons recueillis dans les eaux du Golfe du Saint-Laurent ont ttC mesurks. Le cobalt, le cadmium, et le plomb se trouvent prks ou en dessous des limites de detection des mkthodes analytiques. Les concentrations moyennes du nickel, cuivre, et zinc sont 0.4 pgl-', 0.6 figl-' et 1.8 figl-' respectivement, et il n'y a pas d'kvidence que les conditions locales influencent leurs distributions. La distribution du fer dissous et colloide est like aux prockdks de dilution et de prkcipitation qui prennant place lors du mklange des eaux douces et salines. La distribution du fer particulaire est largement fonction de la circulation et de la sedimentation.[Traduit par le journal]