210Pb dating of sediments in a heavily contaminated drainage channel to the La Plata estuary in Buenos Aires, Argentina.
Concentrations of (210)Pb and (137)Cs in sediment samples collected from two cores at a drainage channel to the La Plata river estuary in Buenos Aires, Argentina, were measured using ultralow-background detection systems. The (210)Pb data were used to determine the rate of sediment accumulation of the sites. These results were correlated with some heavy metal (chromium and lead) concentrations of the samples in an attempt to characterize the historical input of contaminants due to the industrial development, which has taken place in this area over the last century. The (137)Cs measurements demonstrate that cesium dating is not adequate in regions of the southern hemisphere.
Di Gregorio
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Departamento de Física, Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, 1650 San Martín, Provincia de Buenos Aires, Argentina. digregorio@tandar.cnea.gov.ar
Fernández Niello
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JO
Huck
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Somacal
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Curutchet
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D001118:Argentina; D019015:Geologic Sediments / Q000032:analysis* / Q000737:chemistry; D006207:Half-Life; D007856:Lead Radioisotopes / Q000032:analysis* / Q000737:chemistry*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods*; D045483:Rivers / Q000737:chemistry*; D012990:Soil Pollutants, Radioactive / Q000032:analysis* / Q000737:chemistry
D007856:Lead Radioisotopes; D012990:Soil Pollutants, Radioactive