S
S. Levasseur
Researcher at ETH Zurich
Publications - 22
Citations - 1526
S. Levasseur is an academic researcher from ETH Zurich. The author has contributed to research in topics: Isotope fractionation & Mantle (geology). The author has an hindex of 13, co-authored 22 publications receiving 1417 citations. Previous affiliations of S. Levasseur include Institut de Physique du Globe de Paris.
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Iron isotope differences between Earth, Moon, Mars and Vesta as possible records of contrasted accretion mechanisms
TL;DR: In this article, the authors show that the most plausible explanation for the heavier Fe in the Earth and Moon is that both objects grew via processes that involved partial vaporisation leading to kinetic iron isotope fractionation followed by minor loss, consistent with the theory in which the Moon is thought to have originated from a giant impact between the proto-Earth and another planet.
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Systematic iron isotope variations in mantle rocks and minerals: The effects of partial melting and oxygen fugacity
Helen M. Williams,Anne H. Peslier,Catherine McCammon,Alex N. Halliday,Alex N. Halliday,S. Levasseur,Nadya Teutsch,Jean-Pierre Burg +7 more
TL;DR: In this paper, the authors show that there are significant variations in the iron isotope compositions (δ57/54Fe) of mantle rocks (0.9‰) and minerals (olivines 0.6‰), with spinels showing the greatest total variation of 1.7
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Iron isotope fractionation and the oxygen fugacity of the mantle
Helen M. Williams,Catherine McCammon,Anne H. Peslier,Alex N. Halliday,Nadya Teutsch,S. Levasseur,Jean-Pierre Burg +6 more
TL;DR: Spinel δ57/54Fe values correlate with relative oxygen fugacity, Fe3+/ΣFe, and chromium number, and provide a proxy of changes in mantle oxidation state, melting, and volatile recycling.
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Direct measurement of femtomoles of osmium and the 187Os/186Os ratio in seawater
TL;DR: In this article, two depth profiles of the osmium concentration and the187Os/186Os isotopic ratio in the Indian Ocean were obtained from an experimental method that eliminated the problems related to Osmium preconcentration.
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The osmium riverine flux and the oceanic mass balance of osmium
TL;DR: In this paper, the osmium concentration and isotopic composition were determined in a set of 17 of the largest rivers of the world and it was shown that it is possible to estimate a maximum unradiogenic flux to the ocean of 126 kg/yr (cosmic dust or mantle-derived) and an oceanic residence time between 2.5 × 104 and 5.4×104 with a mean of 3.5×104 year.