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  • Author or Editor: C. Corredeira x
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Abstract  

The temporal and spatial distribution of the REEs was determined, by INAA, in sediment cores collected at Northern Iberian shelf along the area between the Finisterra Cape and the mouth of Minho river, to contribute to the understanding of the origin and sedimentation processes of sediments deposited at the Continental Shelf. The distribution pattern of the REEs were flat and similar to the shales. A negative Eu anomaly was found for all the sections of the analyzed cores. Significant positive correlations between the REE and Zr and Hf contents suggest that zircon is responsible for hosting both light and heavy REEs.

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Abstract  

A geochemical study was carried out in sediment cores along the Galician Continental Shelf and at the mouth of the Vigo and Pontevedra Rias. Multielemental analysis was performed by Instrumental Neutron Activation Analysis and Energy Dispersive X-ray Fluorescence Spectrometry. Sedimentological and geochemical characterisation (lithogenic, biogenic and anthropogenic elements) indicates different supplies for the fine-grained, deposited sediments. No significant heavy metal enrichment could be detected in coastal sediments despite the current sediment contamination in adjacent Rias. Variations in the accumulation rates suggest different factors controlling the sedimentation processes including sediment sources and geomorphology.

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