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Neodymium and lead isotope values in sediment samples were used to interpret sediment transport and source rocks on the Southeastern South American upper margin.The sediments of the Argentinian margin exhibit an average ɛ Nd value of −1.9, indicating the influence of the Andean rocks as sediment sources. Sediments from the Río de La Plata estuary show an average ɛ Nd value of −9.6...
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