This study establishes, with a deep (344.64 m) continuous borehole, the Quaternary stratigraphy of the Yangtze delta and identifies lithofacies; examines the distribution of the trace elements in marine and fresh water environments; and defines sets
Atmospheric transport of aerosols and trace gases over southern Africa
Afrique du Sud ; Aérosol ; Changement global ; Circulation atmosphérique ; Climat régional ; Elément-trace ; Modèle ; Précipitation ; Troposphère
Aerosol ; Atmospheric circulation ; Global change ; Model ; Precipitation ; Regional climate ; South Africa ; Trace-element ; Troposphere
In this paper, the recent research will be reviewed. An assessment will be made of the tropospheric thermodynamic structure and atmospheric transport fields that govern the large-scale horizontal and vertical regional transfer of air, trace gases
Provenance of long-travelled dust determined with ultra-trace-element composition : a pilot study with samples from New Zealand glaciers
Australie ; Elément-trace ; Eolien ; Glacier ; Géochimie ; Loess ; Nouvelle-Zélande ; Paléosol ; Pollution atmosphérique ; Poussière éolienne ; South Island ; Transport éolien
Aeolian dust ; Aeolian features ; Aeolian transport ; Atmospheric pollution ; Australia ; Geochemistry ; Glacier ; Loess ; New Zealand ; Palaeosol ; South Island ; Trace-element
The AA. report high-precision inductively coupled plasma mass spectrometric (ICP-MS) compositional data for 39 trace elements in a variety of dust deposits, trapped sediments and surface samples from New Zealand and Australia. Dusts collected from
, Fe, Mg et d'un cortège d'éléments-traces (Cu, Ni, Co, Zn, Pb). Dans le bassin moyen les apports sont essentiellement carbonatés avec Sr en élément-trace et des smectites. Il existe une précipitation des carbonates dans le cours moyen. Les apports du
Aeolian dust ; China ; Heavy metals ; Hydrochemistry ; Loess ; Pollution ; Precipitation ; Tibet ; Trace-element ; Volcanic ash
This study deals with the concentrations and sources of airborne major and trace elements in precipitation waters in the remote E Tibetan mountain region and the highland provinces of Sichuan, Qinghai, and Xizang (Chinese-German joint expedition
Trace-element analysis of the calcareous shells of ostracodes in a sediment core from Farewell Lake provides the first limno-geochemical record for climatic reconstructions in Alaska. When compared with pollen data from the same site, this record
The AA. focus their attention on the provenance of the inland desert and coastal dunes of the Altar Desert, based on the sedimentology, modal analysis and geochemistry of major and trace elements of the sands. The study uses grain size parameters
Présentation des résultats d'une enquête du printemps 1977 sur les niveaux de contamination des sédiments de fond de cet estuaire. Analyse d'hydrocarbures aliphatiques et aromatiques, d'hydrocarbures chlorés et de métaux à l'état de traces.
Action anthropique ; Atmosphère ; Ecologie ; Effet de serre ; Elémenttrace ; Système terre-atmosphère ; Variation climatique
L'influence de l'activité humaine sur l'asmosphère doit retenir l'attention, en particulier le nombre de plus en plus important d'élémentstrace et l'effet de serre. Des modèles de calcul précis et des stratégies économiques doivent permettre de
Présentation des résultats des analyses de six élémentstrace, Zn, Cu, Mn, Co, Ni et Mo, par absorption atomique, spectrophotométrie et polarographie de 340 échantillons prélevés dans 55 sites du bassin moyen du Fleuve Jaune. Discussion de
Trace element distribution in surface soils from a coal burning power production area : A case study from the largest power plant site in Serbia
Analyse des groupes ; Beograd ; Centrale thermique ; Charbon ; Distribution spatiale ; Elément-trace ; Pollution ; Pollution du sol ; Serbie ; Sol
Belgrade ; Cluster analysis ; Coal ; Pollution ; Serbia ; Soil ; Soil pollution ; Spatial distribution ; Thermic power plant ; Trace-element
The content of trace elements (As, Cd, Co, Cr, Cu, Hg, Mn, Ni, Pb and Zn) in surface soils in the area surrounding the largest coal-fired power plant in Serbia was determined to assess the contribution of emissions to pollution. Analysis of mutual
associations between the trace elements and their correlation with soil particle size fractions indicated anthropogenic origin at most sampling sites. Common patterns in trace element concentrations of the analysed soils were identified by hierarchical cluster
analysis. Explanatory spatial analysis, used for characterization and mapping of spatial variability patterns, revealed the highest concentrations of trace elements in areas in predominant wind directions.
Coastal environment ; Geochemistry ; Grain size distribution ; Human impact ; Italy ; Marine sediment ; Mineralogy ; Pollution ; Sicilia ; Trace-element
Granulometry, mineralogy, and trace element concentrations are determined in marine sediments from 36 sampling sites in the littoral environment of the Gulf of Milazzo (NE Sicily). Sediment samples were collected in August 2008, along 18 seaward
transects, at different water depths. Results of grain-size analysis, bulk mineralogical analysis and concentrations of most trace elements are presented and discussed. Trace element mean values from the Gulf of Milazzo are comparable with those measured
in polluted sediments collected in the Gulf of Palermo and Augusta Bay with a moderate enrichment in Zn. Different sources of trace elements and different geochemical mechanisms are probably responsible of this distribution. Among these sources and mechanisms
Comparative study ; European part of Russia ; Fish ; Geochemistry ; Heavy metals ; Hydrobiology ; Pollution ; Trace-element ; Volga ; Water ; Watershed
Caractéristiques comparées de la teneur d'une série de micro-éléments (Ni, Cu, Sr, Al, Zn, Co, Mn, Pb, Cd, Hg, As) dans des organismes de poissons (par exemple des brèmes des lacs de barrage du bassin de la Volga) et examen des règles de leur