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Displaying 18 results.
    • Journal article
    Quantifying the impact of freshwater diatom productivity on silicon isotopes and silicon fluxes : Lake Myvatn, Iceland
    Opfergelt, Sophie[UCL] Eiriksdottir, E.S. Burton, K.W. Einarsson, A. Siebert, C Gislason, S.R. Halliday, A.N (2011) Earth and Planetary Science Letters — , no. 305, p. 73-82 (2011)
    • Speech
    Seasonal magnesium isotope variations in soil solutions reflecting physico-chemical processes controlling soil weathering fluxes
    Opfergelt, Sophie[UCL] Georg, R.B. Burton, K.W. Guicharnaud, R. Siebert, C. Gislason, S.R. Halliday, A.N. (2011) Goldschmidt conference — Prague, Czech Republic
    • Speech
    Changing riverine silicon isotope delivery to the ocean over glacial-interglacial intervals? Evidence from glaciated basaltic terrains
    Opfergelt, Sophie[UCL] Burton, K.W. Pogge von Strandmann , P.A.E. Gislason, S.R. Halliday, A.N. (2013) Goldschmidt conference — Florence, Italy
    • Speech
    Multi-isotopic approach to assess the role of soil weathering processes on rivers draining a basaltic catchment
    Opfergelt, Sophie[UCL] Georg, D. Burton, K.W. Gislason, S.R. Sigfusson, B Halliday, A.N. (2009) AGU Fall meeting — San Francisco
    • Journal article
    Riverine silicon isotope variations in glaciated basaltic terrains: implications for the Si delivery to the ocean over glacial-interglacial intervals
    Opfergelt, Sophie[UCL] Burton, K.W. Pogge von Strandmann, P.A.E. Gislason, S.R. Halliday, A.N. (2013) Earth and Planetary Science Letters — Vol. 369-370, p. 211-219 (2013)
    • Speech
    Tracing impact of pedogenic processes on soil solutions with Si and Mg isotopes
    Opfergelt, Sophie[UCL] Georg, R.B. Burton, K.W. Guicharnaud, R. Gislason, S.R. Halliday, A.N (2010) 19th World Congress of Soil Science, 2010 — Brisbane, Australia
    • Speech
    Quantifying the impact of freshwater diatom productivity on silicon isotopes and silicon fluxes: Lake Myvatn, Iceland
    Siebert, C. Opfergelt, Sophie[UCL] Burton, K.W. Einarsson, A Eiriksdottir, E.S Gislason, S.R. Halliday, A.N (2010) AGU Fall Meeting, 2010 — San Francisco, USA
    • Speech
    Impact of the soil weathering degree on the fate of soil organic carbon, Fe and Si: insights from Si and Fe isotopes in Icelandic soils.
    Opfergelt, Sophie[UCL] Williams, H.M Cornélis, Jean-Thomas[UCL] Van Hoye, Florence[UCL] Guicharnaud, R.A. Sigfusson, B Georg, R.B Siebert, C Gislason, S.R. Halliday, A.N Burton, K.W. (2014) Goldschmidt 2014 — Sacramento, USA
    • Journal article
    Corrigendum to: Riverine silicon isotope variations in glaciated basaltic terrains: implications for the Si delivery to the ocean over glacial-interglacial intervals [Earth Planet. Sci. Lett. 369-370 (2013) 211-219]
    Opfergelt, Sophie[UCL] Burton, K.W. Pogge von Strandmann , P.A.E. Gislason, S.R. Halliday, A.N. (2013) Earth and Planetary Science Letters — Vol. 375, p. 451-452 (2013)
    • Speech
    Seasonal freeze-thaw cycles and iron mobilization from peat soils: role of organo-metallic complexes
    Opfergelt, Sophie[UCL] Williams, Helen Cornélis, Jean-Thomas Guicharnaud, Rannveig Georg, R.B. Siebert, Chris Gislason, S.R. Halliday, A.N. Burton, K.W. (2016) AGU Fall Meeting 2016 — San Francisco
    • Journal article
    Magnesium retention on the soil exchange complex controlling Mg isotope variations in soils, soil solutions and vegetation in volcanic soils
    Opfergelt, Sophie[UCL] Burton, K.W. Georg, R.B. West, A.J. Guicharnaud, R.A. Sigfusson, B. Siebert, C. Gislason, S.R. Halliday, A.N. (2014) Geochimica et Cosmochimica Acta — Vol. 125, p. 110-130 (2014)
    • Journal article
    Lithium, magnesium and silicon isotope behaviour accompanying weathering in a basaltic soil and pore water profile in Iceland
    Pogge von Strandmann, P.A.E. Opfergelt, Sophie[UCL] Lai, Y.J. Sigfusson, B. Gislason, S.R. Burton, K.W. (2012) Earth and Planetary Science Letters — Vol. 339-340, p. 11-23 (2012)
    • Speech
    Magnesium isotopes as a proxy of physico-chemical processes controlling soil weathering fluxes
    Opfergelt, Sophie[UCL] Georg, R.B. Burton, K.W. Guicharnaud, R Siebert, C. Gislason, S.R. Halliday, A.N. (2011) Young Soil Scientists Day, 2011 — Brussels
    • Journal article
    Iron and silicon isotope behaviour accompanying weathering in Icelandic soils, and the implications for iron export from peatlands
    Opfergelt, Sophie[UCL] Williams, H.M Cornélis, Jean-Thomas Guicharnaud, R.A Georg, R.B. Siebert, C. Gislason, S.R. Halliday, A.N. Burton, K.W. (2017) Geochimica et Cosmochimica Acta — , no.217, p. 273-291 (2017)
    • Speech
    Volcanic impact on the silicon isotope composition in natural waters during the 2010 Eyjafjallajökull eruption, S-Iceland
    Alfredsson, H.A. Opfergelt, Sophie[UCL] Burton, K.W. Gislason, S.R. (2012) Goldschmidt conference — Montréal, Canada
    • Journal article
    Silicon isotopes in allophane as a proxy for mineral formation in volcanic soils
    Opfergelt, Sophie[UCL] Burton, K.W. Guicharnaud, R. Siebert, C. Gislason, S.R. Halliday, A.N. (2011) Applied Geochemistry — Vol. 26, no. S1, p. S115-S118 (2011)
    • Speech
    Controls on magnesium fluxes from basalt weathering and the role of plant cycling: evidence from Mg isotopes in Icelandic soils
    Opfergelt, Sophie[UCL] Burton, K.W. Georg, R.B. West, A.J. Guicharnaud, R.A. Sigfusson, B. Siebert, C. Gislason, S.R. Halliday, A.N. (2013) EnvironMetal Isotopes — Ascona, Switzerland
    • Speech
    Impact of freshwater diatom productivity on silicon isotopes and silicon fluxes: Lake Myvatn, Iceland
    Opfergelt, Sophie[UCL] Eiriksdottir, E.S. Burton, K.W. Einarsson, A Siebert, C. Gislason, S.R. Halliday, A.N. (2011) Isotopes in Biogenic Silica (IBiS), 2011 — Antwerp, Belgium