Quality assessment of the marine sediments around a petrochemical submarine outfall, the north coast of São Paulo state, Brazil, based on nutrient (C, N, S) oncetrations, heavy metals and preliminary lead isotope compositions - Duleba, Wânia; Prada, Silvio Miranda; Teodoro, Andreia Cristiane; Gioia, Simone; Babinski, Marly; Kirk, Jason Donald; Brissow, E.; Oliveira, E. (South American Symposium on Isotope Geology, 2008)