Tracing Lead sources and chronologies in sediments and coral cores in Kuwait (original) (raw)

Abstract

Objective and Methods The objective of this study was to reconstruct detailed input chronologies of Pb and other trace metals in the Kuwaiti marine environment, influenced by the Shatt-al-Arab River’s load (SaAR), using seawater, and sediment and coral cores. Pb concentrations were determined by plasma mass spectrometry using resin preconcentration and isotope dilution (ID) for seawater, a “Graney leach” extraction and ID on sediments, and cleaning, dissolution and ID on corals. Pb isotopic distributions in seawater, sediments and corals were determined using multicollector magnetic sector plasma mass spectrometry after anion exchange purification of Pb. Results and Discussion Seawater Pb concentrations are high in the northern stations, including Kuwait Bay (KB). They show combined anthropogenic and riverine sources, while waters at a coral reef near Qaruh Island (QI) show high Pb. Comparing the Pb concentration and isotopic fractionation in two sediment cores near KB and near the ...

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