http://www.cnr.it/ontology/cnr/individuo/prodotto/ID6462
Alteration effects of volcanic ash in seawater. Anomalous y/ho ratios in coastal waters of the central Mediterranean sea. (Articolo in rivista)
- Type
- Label
- Alteration effects of volcanic ash in seawater. Anomalous y/ho ratios in coastal waters of the central Mediterranean sea. (Articolo in rivista) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
- Alternative label
Censi, P., Sprovieri, M., La Rocca, D., Aricò, P., Saiano, F., Mazzola, S. (2007)
Alteration effects of volcanic ash in seawater. Anomalous y/ho ratios in coastal waters of the central Mediterranean sea.
in Geochimica et cosmochimica acta
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Censi, P., Sprovieri, M., La Rocca, D., Aricò, P., Saiano, F., Mazzola, S. (literal)
- Pagina inizio
- Pagina fine
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- Rivista
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- ISI Web of Science (WOS) (literal)
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- Dipartimento di Scienze Geologiche, Universita` di Catania, Catania, Italy; IAMC-CNR, Napoli, Italy; Dipartimento C.F.T.A., Universita` di Palermo, Palermo, Italy; Dipartimento I.T.A.F., Universita` di Palermo, Palermo, Italy; IAMC-CNR, Mazara del Vallo (Tp), Italy (literal)
- Titolo
- Alteration effects of volcanic ash in seawater. Anomalous y/ho ratios in coastal waters of the central Mediterranean sea. (literal)
- Abstract
- This paper presents the results of a study based on data collected during the oceanographic cruise ANSIC 2001 carried out
in the Ionian Sea during the explosive activity of Mount Etna in the summer of 2001. Anomalous low values of Y/Ho ratios in
seawater suggest extensive scavenging processes on the surfaces of smectitic alteration products, with Y and Ho fractionation
controlled by the differences in their electronic configurations and behaviour during solution/surface complexation equilibria.
These processes can also be traced through the presence of significant tetrad effects recorded in the chondrite-normalised Rare
Earth Elements and Yttrium (YREEs) patterns of suspended particulate matter. This suggests that the preferential Y scavenging
from seawater is due to the formation of inner-sphere complexes with OH? groups on montmorillonite crystal surfaces.
The preliminary results of kinetic experiments of YREE released from volcanic ash to coexisting seawater, and the
related effects on Y/Ho ratios and Ce anomalies, are consistent with the fractionation of Light Rare Earth Elements (LREEs)
with respect to Heavy Rare Earth Elements (HREEs) observed in dissolved phase. They suggest a behaviour of Y similar to
that reported for LREEs, particularly for Ce and Pr. (literal)
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