translate English to French: All lamprophyres contain high levels of Cr (284–393 ppm), Ni (101–180 ppm), Ba (1380–5580 ppm), Sr (2359–3109 ppm), and rare-earth elements (REE; LaN = 191–288), with average LaN/LuN = 26 and no Eu-anomalies.
Tous les lamprophyres contiennent des niveaux élevés de Cr (284–393 ppm), de Ni (101–180 ppm), de Ba (1380–5580 ppm), de Sr (2359–3109 ppm) et d'éléments des terres rares (LaN = 191–288) avec une moyenne LaN/LuN = 26 et aucune anomalie Eu.