Valdès J. auteur aut IRD Sifeddine Abdelfettah auteur aut IRD text journalArticle spa text/pdf reformatted digital access The total carbon, total nitrogen, total sulphur, organic matter, Ni, Cd, Pb, Cu, and Zn concentrations were measured in coastal sediments (10 m water depth) at eight stations in Mejillones Bay. The elemental composition of these sediments is a function of the autochthonous organic matter generated in this coastal system. The order of abundance for the metals was: Zn > Cu > Ni > Pb > Cd. The metal content is not explained by the organic matter content or grain size of these coastal sediments. The evaluation of the concentration metals in the sediments showed that Ni, Zn, and Pb are slightly enriched at the present, although with values that are similar to preindustrial concentrations. A cluster analysis of the similarity in the study area separated the Mejillones coast into two main zones: one related to the industrial activity developed in this bay and the other related to the urban develop of Mejillones city, with characteristics similar to environments free of direct human activity. specialized marine sediments heavy metals elemental analysis Mejillones Chile 064 37 2 131-141 2009 0718-560X https://www.documentation.ird.fr/hor/fdi:010048170 10.3856/vol37-issue2-fulltext-2 0718-560X [F B010048170] https://www.documentation.ird.fr/hor/fdi:010048170 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers16-08/010048170.pdf IRD - Base Horizon / Pleins textes 2009-10-07 2017-08-23 fdi:010048170 fre