S
Stefan Weyer
Researcher at Leibniz University of Hanover
Publications - 112
Citations - 6769
Stefan Weyer is an academic researcher from Leibniz University of Hanover. The author has contributed to research in topics: Isotope fractionation & Stable isotope ratio. The author has an hindex of 38, co-authored 100 publications receiving 5769 citations. Previous affiliations of Stefan Weyer include Goethe University Frankfurt & University of Rochester.
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Journal ArticleDOI
Separation of high field strength elements (Nb, Ta, Zr, Hf) and Lu from rock samples for MC‐ICPMS measurements
TL;DR: In this article, a single-column separation procedure for purification of Hf and Lu by ion exchange using Eichrom® Ln-Spec resin was presented, allowing measurements of Zr/Nb with a precision of better than ±5% (2σ).
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Natural fractionation of 238U/235U
TL;DR: In this article, the authors report variations of the 238U/235U isotope ratio in natural samples (basalts, granites, seawater, corals, black shales, suboxic sediments, ferromanganese crusts/nodules and BIFs) of ∼1.3.
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Evolution of planetary cores and the Earth-Moon system from Nb/Ta systematics.
TL;DR: High-precision measurements of Nb/Ta and Zr/Hf reveal that Nb is moderately siderophile at high pressures, and can be linked in time with the final core-mantle equilibration on Earth 4.533 billion years ago.
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High precision Fe isotope measurements with high mass resolution MC-ICPMS
Stefan Weyer,J.B Schwieters +1 more
TL;DR: In this paper, a new technique for high precision measurement of iron isotope ratios using high mass resolution MC-ICPMS on the Thermo-Finnigan Neptune was presented, and the performance of the technique was tested by determining the reproducibility and accuracy of synthetic Fe samples and spiked standards against the IRMM014 standard.
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The Preparation and Preliminary Characterisation of Eight Geological MPI-DING Reference Glasses for In-Situ Microanalysis
Klaus Peter Jochum,Donald B. Dingwell,Alexander Rocholl,Brigitte Stoll,Albrecht W. Hofmann,S. Becker,A. Besmehn,D. Bessette,H.-J. Dietze,Peter Dulski,J. Erzinger,Eric Hellebrand,Peter Hoppe,Ingo Horn,Koen Janssens,George A. Jenner,Max Klein,William F. McDonough,M. Maetz,Klaus Mezger,C. Müker,Igor K. Nikogosian,C. Pickhardt,Ingrid Raczek,Dieter Rhede,H. M. Seufert,S.G. Simakin,Alexander V. Sobolev,B. Spettel,Susanne M. Straub,Laszlo Vincze,A. Wallianos,G. Weckwerth,Stefan Weyer,D. Wolf,M. Zimmer +35 more
TL;DR: In this paper, eight silicate glasses were prepared by directly fusing and stirring 50-100 g each of basalt, andesite, komatiite, peridotite, rhyolite, and quartz-diorite.