Search results for "Gd anomaly"

showing 2 items of 2 documents

Distribution of REEs in box-core sediments offshore an industrial area in SE Sicily, Ionian Sea: Evidence of anomalous sedimentary inputs

2009

The distribution of rare earth elements and yttrium (REEs+Y) has been investigated in box-core sediments recovered from four stations in the Sicilian coastal zone seawards of Augusta, one of the most industrialized and contaminated areas in the Mediterranean region. Shale-like REE patterns and low Y/Ho ratios (close to the chondritic ratio) suggest a dominant terrigenous (geogenic) source for REE. Slight enrichment of LREE over the HREE is interpreted as due to preferential adsorptive transfer of LREE from seawater to sediment particles. Samples from offshore cores exhibit slightly positive Gd and negative Ce anomalies. It is here hypothesized that main drivers of anthropogenic Gd flux towa…

Geologic SedimentsEnvironmental EngineeringHealth Toxicology and MutagenesisOceans and SeasGeochemistryFluxMineralogyIndustrial WasteGadoliniumGeologic SedimentsMediterranean seaEnvironmental ChemistrySicilyRare earth elements Ce anomaly Gd anomaly Box-core sediment Offshore Ionian SeaTerrigenous sedimentPublic Health Environmental and Occupational HealthSedimentGeneral MedicineGeneral ChemistryCeriumPollutionSettore GEO/08 - Geochimica E VulcanologiaSeawaterSedimentary rockMetals Rare EarthBayGeologyWater Pollutants ChemicalEnvironmental Monitoring
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Rare earths behaviour during the deposition of volcanic sublimates

2017

Abstract In this study, the REE distribution between volcanic fluids and related solids in fumaroles with temperatures ranging from approximately 100 to 421 °C was investigated in different geological scenarios. The treatment of geochemical REE data was carried out by calculating the REE enrichment factors (EF REE ) relative to the volcanic host rocks in studied sites under the assumption that the REE transport takes place as silicate aerosol in volcanic fluids. Shale-normalised REE concentrations in these fluids have been assessed to investigate whether the REE transport as aqueous complexes in water-saturated volcanic gas is reasonable. The REE behaviour in alkaline condensates according …

010504 meteorology & atmospheric sciencesGeochemistryVolcanic condensatesSublimate010502 geochemistry & geophysicsVolcanic condensate01 natural sciencesAnthropogenic pollutionchemistry.chemical_compoundGd anomalyGeochemistry and PetrologySublimatesGeophysic0105 earth and related environmental sciencesgeographygeography.geographical_feature_categoryVolcanic islandsREESilicateFumaroleAerosolGeophysicsDeposition (aerosol physics)chemistryVolcanoVolcanic island[SDU]Sciences of the Universe [physics]Geology
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