Search Results - "Freydier, R."

Heavy iron isotope composition of granites determined by high resolution MC-ICP-MS by Poitrasson, Franck, Freydier, Rémi

“…High mass resolution multicollector inductively coupled plasma mass spectrometry (MC-ICP-MS) was assessed for iron isotope measurement of natural samples after…”
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Detangling past and modern zinc anthropogenic source contributions in an urbanized coastal river by combining elemental, isotope and speciation approaches by Garnier, J., Tonha, M., Araujo, D.F., Landrot, G., Cunha, B., Machado, W., Resongles, E., Freydier, R., Seyler, P., Ratié, G.

“…The accumulation of trace metals in the environmental compartments of coastal rivers is a global and complex environmental issue, requiring multiple tools to…”
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Zinc stable isotope fractionation during its adsorption on oxides and hydroxides by Pokrovsky, O.S., Viers, J., Freydier, R.

“…Adsorption of Zn on goethite, hematite, birnessite, pyrolusite, corundum, and gibbsite was studied using a batch adsorption technique as a function of pH, zinc…”
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Zn isotopes as tracers of anthropogenic pollution from Zn-ore smelters The Riou Mort–Lot River system by Sivry, Y., Riotte, J., Sonke, J.E., Audry, S., Schäfer, J., Viers, J., Blanc, G., Freydier, R., Dupré, B.

“…Zn isotopes were used to trace the anthropogenic sources in the Lot watershed (Aveyron, SW France) where a small river, the Riou Mort drains an industrial…”
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Fate of antimony contamination generated by road traffic – A focus on Sb geochemistry and speciation in stormwater ponds by Philippe, M., Le Pape, P., Resongles, E., Landrot, G., Freydier, R., Bordier, L., Baptiste, B., Delbes, L., Baya, C., Casiot, C., Ayrault, S.

“…Although antimony (Sb) contamination has been documented in urban areas, knowledge gaps remain concerning the contributions of the different sources to the Sb…”
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Strong temporal and spatial variation of dissolved Cu isotope composition in acid mine drainage under contrasted hydrological conditions by Masbou, J., Viers, J., Grande, J.-A., Freydier, R., Zouiten, C., Seyler, P., Pokrovsky, O.S., Behra, P., Dubreuil, B., de la Torre, M.-L.

“…Copper export and mobility in acid mine drainage are difficult to understand with conventional approaches. Within this context, Cu isotopes could be a powerful…”
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A 3500-Year Record of Hg and Pb Contamination in a Mediterranean Sedimentary Archive (The Pierre Blanche Lagoon, France) by Elbaz-Poulichet, F, Dezileau, L, Freydier, R, Cossa, D, Sabatier, P

“…A sediment core encompassing 3500 years of continuous sedimentation has been collected from a coastal lagoon located on the southwestern French Mediterranean…”
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Copper isotope fractionation during its interaction with soil and aquatic microorganisms and metal oxy(hydr)oxides: Possible structural control by Pokrovsky, O.S., Viers, J., Emnova, E.E., Kompantseva, E.I., Freydier, R.

“…This work is aimed at quantifying the main environmental factors controlling isotope fractionation of Cu during its adsorption from aqueous solutions onto…”
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Measurement of the isotopic composition of dissolved iron in the open ocean by Lacan, F., Radic, A., Jeandel, C., Poitrasson, F., Sarthou, G., Pradoux, C., Freydier, R.

“…This work demonstrates for the first time the feasibility of the measurement of the isotopic composition of dissolved iron in seawater for a typical open ocean…”
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Historical variations in the isotopic composition of atmospheric zinc deposition from a zinc smelter by Sonke, Jeroen E., Sivry, Yann, Viers, Jérôme, Freydier, Remi, Dejonghe, Léon, André, Luc, Aggarwal, Jugdeep K., Fontan, Francois, Dupré, Bernard

“…In order to test the usefulness of stable zinc isotopes as an atmospheric source tracer, we analyzed the zinc isotopic composition of two sediment cores, taken…”
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Evidence of Zn isotopic fractionation in a soil–plant system of a pristine tropical watershed (Nsimi, Cameroon) by Viers, Jérôme, Oliva, Priscia, Nonell, Anthony, Gélabert, Alexandre, Sonke, Jeroen E., Freydier, Rémi, Gainville, Romuald, Dupré, Bernard

“…The objective of this study is to determine for the first time the zinc (Zn) isotopic composition of different soil horizons, parent rocks, litter, and plants…”
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Boron isotopes in precipitation: Experimental constraints and field evidence from French Guiana by Chetelat, B., Gaillardet, J., Freydier, R., Négrel, Ph

“…Precipitation samples collected during one year in French Guiana were analyzed both for boron concentrations and isotopic compositions ( δ 11B). B…”
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Pyroxenites from the Southwest Indian Ridge, 9-16°E: Cumulates from Incremental Melt Fractions Produced at the Top of a Cold Melting Regime by Dantas, C., Ceuleneer, G., Gregoire, M., Python, M., Freydier, R., Warren, J., Dick, H. J. B.

“…The Southwest Indian Ridge (SWIR) at 9-16°E and 52-53°S is characterized by ultra-slow, oblique spreading and contains one of the few documented occurrences of…”
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Trace element heterogeneity along isochronous growth layers in bivalve shell: Consequences for environmental reconstruction by Lazareth, C.E., Le Cornec, F., Candaudap, F., Freydier, R.

“…To precisely reconstruct environmental changes from high-resolution bivalve shell geochemistry, the shell layers must represent environmental conditions at the…”
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A multidating approach applied to historical slackwater flood deposits of the Gardon River, SE France by Dezileau, L., Terrier, B., Berger, J.F., Blanchemanche, P., Latapie, A., Freydier, R., Bremond, L., Paquier, A., Lang, M., Delgado, J.L.

“…A multidating approach was carried out on slackwater flood deposits, preserved in valley side rock cave and terrace, of the Gardon River in Languedoc,…”
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Interferences and Matrix Effects on Iron Isotopic Composition Measurements by 57Fe-58Fe Double-Spike Multi-Collector Inductively Coupled Plasma Mass Spectrometry; the Importance of Calcium and Aluminum Interferences by Lacan, F., Artigue, L., Klar, J. K., Pradoux, C., Chmeleff, J., Freydier, R.

“…Multi-collector inductively coupled plasma mass spectrometers (MC-ICPMS) are widely used for Fe isotope measurements. The latter may be perturbed by…”
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Size Fractionation of Trace Elements in a Seasonally Stratified Boreal Lake: Control of Organic Matter and Iron Colloids by Pokrovsky, O. S., Shirokova, L. S., Zabelina, S. A., Vorobieva, T. Ya, Moreva, O. Yu, Klimov, S. I., Chupakov, A. V., Shorina, N. V., Kokryatskaya, N. M., Audry, S., Viers, J., Zoutien, C., Freydier, R.

“…The colloidal distribution and size fractionation of organic carbon and trace elements were studied in a seasonally stratified, organic-rich boreal lake, Lake…”
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Present weathering rates in a humid tropical watershed: Nsimi, South Cameroon by Braun, Jean-Jacques, Ngoupayou, Jules Remy Ndam, Viers, Jérôme, Dupre, Bernard, Bedimo Bedimo, Jean-Pierre, Boeglin, Jean-Loup, Robain, Henri, Nyeck, Brunot, Freydier, Rémi, Nkamdjou, Luc Sigha, Rouiller, James, Muller, Jean-Pierre

“…The study of biogeochemical and hydrological cycles in small experimental watersheds on silicate rocks, common for the Temperate Zone, has not yet been widely…”
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The influence of particle composition on thorium scavenging in the NE Atlantic ocean (POMME experiment) by Roy-Barman, M., Jeandel, C., Souhaut, M., Rutgers van der Loeff, M., Voege, I., Leblond, N., Freydier, R.

“…230Th, 232Th and 234Th were analyzed in sinking particles collected by moored and drifting sediment traps in the NE Atlantic Ocean (POMME experiment) in order…”
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Influence of intense scavenging on Pa-Th fractionation in the wake of Kerguelen Island (Southern Ocean) by Venchiarutti, C., Roy-Barman, M., Freydier, R., van Beek, P., Souhaut, M., Jeandel, C.

“…Dissolved and particulate excess 230Th and 231Pa concentrations (noted 230Thxs and 231Paxs respectively) and 231Paxs/230Thxs activity ratios were investigated…”
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