Dr. Manuela Fehr
Dr. Manuela Fehr
Mitarbeiterin bei Professur f. Isotopengeochemie
Zusätzliche Informationen
Forschungsgebiet
Entwicklung von analytischen Methoden zur Bestimmung von Isotopenzusammensetzungen in geologischen Materialien mittels MC-ICPMS.
Erforschung von Prozessen im frühen Sonnensystem mittels kurzlebigen Radionukliden und nukleosynthetischen Anomalien.
Fraktionierung von nicht-traditionellen stabilen Isotopensystemen zum Studium von z.B. Alteration und volatilitäts-abhängigen Prozessen im frühen Sonnensystem und Redox-Prozessen in Paleozeanographie.
seit 2013 ETH Zürich, Institute of Geochemistry and Petrology: Laboratory Manager Isotope Cosmochemistry
2008 - 2013 The Open University, UK: Lab manager Neptune MC-ICPMS laboratory
2007 - 2008 The Open University, UK: Postdoctoral Research Fellow
2004 - 2007 Swedish Museum of Natural History, Stockholm: Postdoctoral Researcher
2000 - 2004 ETH Zürich, Ph.D. (Doctor of Natural Sciences, Dr. sc. nat.). Titel der Doktorarbeit: Tellurium isotopes and their applications in cosmo- and geochemistry
1994 - 1999 ETH Zürich, Diplom in Geologie (Dipl. Natw. ETH)
Weitere Informationen
Publikationsliste
Anguelova M., Vilela N., Kommescher S., Greber N. D., Fehr M. A., and Schönbächler M. (2024) Constraining the mass-dependent Ti isotope composition of the chondritic reservoir – An inter-laboratory comparison study. Geochim. Cosmochim. Acta 372, 171–180.
Fitzpayne A., Giuliani A., Howarth G. H., Peters B., Fehr M. A., and Maas R. (2023) Major-, trace-element and Sr-Nd-Hf isotope geochemistry of diamondiferous dykes from Tonguma and Koidu, Sierra Leone: Highly micaceous kimberlites formed by assimilation of metasomatised lithospheric mantle rocks. Chem. Geol. 630, 121475.
Rüfenacht M., Morino P., Lai Y.-J., Fehr M. A., Haba M. K., and Schönbächler M. (2023) Genetic relationships of solar system bodies based on their nucleosynthetic Ti isotope compositions and sub-structures of the solar protoplanetary disk. Geochim. Cosmochim. Acta 355, 110–125.
Tissot F. L. H., Ibañez-Mejia M., Rabb S. A., Kraft R. A., Vocke R. D., Fehr M. A., Schönbächler M., Tang H., and Young E. D. (2023) A community-led calibration of the Zr isotope reference materials: NIST candidate RM 8299 and SRM 3169. J. Anal. At. Spectrom. 38, 2087-2104.
Anguelova M., Fehr M. A., Takazawa E., and Schönbächler M. (2022) Titanium isotope heterogeneity in the Earth’s mantle: A case study of the Horoman peridotite massif. Geochim. Cosmochim. Acta 335, 356-368.
Williams N.H., Fehr M. A., Parkinson I. J., Mandl. M. B., and Schönbächler M. (2021) Titanium isotope fractionation in solar system materials. Chem. Geol. 568, 120009.
Friebel M., Toth E. R., Fehr M. A., and Schönbächler M. (2020) Efficient separation and high-precision analyses of tin and cadmium isotopes in geological materials. J. Anal. At. Spectrom. 35, 273-292.
Toth E. R., Fehr M. A., Friebel M., and Schönbächler M. (2020) Cadmium isotopes in chondrites and acid leachates: Nucleosynthetic homogeneity and a monitor for thermal neutron capture effects. Geochim. Cosmochim. Acta 274, 286-301.
Remmelzwaal S. R. C., Dixon S., Parkinson I. J., Schmidt D. N., Monteiro F. M., Sexton F., Fehr M. A., Peacock C., Donnadieu Y., and James R. H. (2019) Investigating ocean deoxygenation during the PETM through the Cr isotopic signature of foraminifera. Paleoceanogr. Paleoclimatol. 34, 917-929.
Argapadmi W., Toth E. R., Fehr M. A., Schönbächler M., and Heinrich C. A. (2018) Silver isotopes as a source and transport tracer for gold: A reconnaissance study at the Sheba and New Consort Gold Mines in the Barberton greenstone belt, Kaapvaal Craton, South Africa. Econ. Geol. 113, 1553-1570.
Fehr M. A., Hammond S. J., and Parkinson I. J. (2018) Tellurium stable isotope fractionation in chondritic meteorites and some terrestrial samples. Geochim. Cosmochim. Acta 222, 17-33.
Szymanowski D., Fehr M. A., Guillong M., Coble M. A., Wotzlaw J.-F., Nasdala L., Ellis B. S., Bachmann O., and Schönbächler M. (2018) Isotope-dilution anchoring of zircon reference materials for accurate Ti-in zircon thermometry. Chem. Geol. 481, 146-154.
Magna T., Day J. M. D., Mezger K., Fehr M. A., Dohmen R., Chennaoui A. H., and Agee C. B. (2015) Lithium isotope constraints on crust-mantle interactions and surface processes on Mars. Geochim. Cosmochim. Acta 162, 46-65.
Schönbächler M. and Fehr M. A. (2014) Basics of Ion Exchange Chromatography for selected geological applications. In: Analytical Geochemistry/Inorganic Instrument Analysis (W.F. McDonough, Ed.). Treatise on Geochemistry, volume 15, 123-146. Elsevier.
Sephton M. A., James R. H., Fehr M. A., Bland P. A., and Gounelle M. (2013) Lithium isotopes as indicators of meteorite parent body alteration. Meteorit. Planet. Sci. 48, 872–878.
Bonnand P., Parkinson I. J., James R. H., Karjalainen A.-M., and Fehr M. A., (2011). Precise determination of Cr isotopes in low concentration terrestrial carbonates by double spike MC-ICP-MS. Journal of Analytical Atomic Spectrometry, 26, 528-535.
Fehr M. A., Andersson P. S., Hålenius U., Gustafsson Ö., and Mörth C.-M. (2010) Iron enrichments and Fe isotopic compositions of surface sediments from the Gotland Deep, Baltic Sea. Chem. Geol., 277, 310-322.
Fehr M. A., Rehkämper M., Halliday A. N., Hattendorf B., and Günther D. (2009) Tellurium isotope compositions of calcium-aluminum-rich inclusions. Meteorit. Planet. Sci. 44, 971-984.
Fehr M. A., Andersson P. S., Hålenius U., and Mörth C.-M. (2008) Iron isotope variations in Holocene sediments of the Gotland Deep, Baltic Sea. Geochim. Cosmochim. Acta 72, 807-826.
Fehr M. A., Rehkämper M., Halliday A. N., Schönbächler M., Hattendorf B., and Günther D. (2006) Search for nucleosynthetic and radiogenic tellurium isotope anomalies in carbonaceous chondrites. Geochim. Cosmochim. Acta 70, 3436-3448.
Fehr M. A., Rehkämper M., Halliday A. N., Wiechert U., Hattendorf B., Günther D., Ono S., Eigenbrode J. L., and Rumble III D. (2005) Tellurium isotopic composition of the early solar system – A search for effects resulting from stellar nucleosynthesis, 126Sn decay and mass independent fractionation. Geochim. Cosmochim. Acta 69, 5105-5118.
Schönbächler M., Rehkämper M., Fehr M. A., Halliday A. N., Hattendorf B., and Günther D. (2005) Nucleosynthetic zirconium isotope anomalies in acid leachates of carbonaceous chondrites. Geochim. Cosmochim. Acta 69, 5119-5128.
Fehr M. A., Rehkämper M., and Halliday A. N. (2004) Application of MC-ICPMS to the precise determination of tellurium isotope compositions in chondrites, iron meteorites and sulfides. Int. J. Mass. Spec. 232, 83-94.
Schönbächler M., Lee D.-C., Rehkämper M., Halliday A. N., Fehr M. A., Hattendorf B., and Günther D. (2003) Zirconium isotope evidence for incomplete admixing of r-process components in the solar nebula. Earth Planet. Sci. Lett. 216, 467-481.