Geochemistry of marine sediments from inner Ría de Vigo (NW Spain)


Two sediment cores were recovered in San Simón Bay (NW Spain) in order to establish sediment accumulation rates by 210Pb and 137Cs dating and to reconstruct metal pollution history. Sediment composition was determined by X-ray Fluorescence. A main lithogenic origin was shown up. Grain size conditions radionuclide activities and element concentrations. Fine grained sediments concentrate pollutants and showed higher activities. Radionuclide profiles are affected by diagenetic processes and sedimentary disturbances, but a temporal framework could be obtained for the intertidal area, where the anthropogenic inputs of Cu, Pb and Zn started several decades ago.

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The European programme SOCFAC in the framework of the Human Potential Program—Access to Research Infrastructures of the European Commission (contract No. HPRI-CT-1999-00108) has funded the analytical work carried out at the NOCS, and we are grateful to Dr. I.W. Croudace for providing access to facilities and for data. P.A.-I. also thanks the support from the Spanish MEC through a PhD fellowship (F.P.U.). This paper is a contribution to the project CTM2007-61227/MAR of the Spanish MCYT, and to the project PGIGIT06TAM31201PR of the Xunta de Galicia.

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Correspondence to P. Álvarez-Iglesias.

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Álvarez-Iglesias, P., Rubio, B. Geochemistry of marine sediments from inner Ría de Vigo (NW Spain). J Radioanal Nucl Chem 281, 247–251 (2009).

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  • 210Pb
  • 137Cs
  • Marine sediments
  • Geochemistry
  • Metal pollution
  • Shallow coastal environment