Currently browsing: Items authored or edited by Manuela Fehr

Williams, Niel H.; Fehr, Manuela A.; Parkinson, Ian J.; Mandl, Maximilian B. and Schönbächler, Maria (2021). Titanium isotope fractionation in solar system materials. Chemical Geology, 568, article no. 120009.

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Remmelzwaal, Serginio R.C.; Dixon, Sophie; Parkinson, Ian J.; Schmidt, Daniela N.; Monteiro, Fanny M.; Sexton, Philip; Fehr, Manuela A.; Peacock, Caroline; Donnadieu, Yannick and James, Rachael H. (2019). Investigating ocean deoxygenation during the PETM through the Cr isotopic signature of foraminifera. Paleoceanography and Paleoclimatology, 34(6) pp. 917–929.

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Fehr, Manuela A.; Hammond, Samantha J. and Parkinson, Ian J. (2018). Tellurium stable isotope fractionation in chondritic meteorites and some terrestrial samples. Geochimica et Cosmochimica Acta, 222 pp. 17–33.

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Sephton, Mark; James, Rachael H.; Fehr, Manuela; Bland, Philip and Gounelle, Matthieu (2013). Lithium isotopes as indicators of meteorite parent body alteration. Meteoritics & Planetary Science, 48(5) pp. 872–878.

Dixon, Sophie; Parkinson, Ian; Sexton, Philip; Fehr, Manuela; Peacock, Caroline and James, Rachael (2013). Ocean redox across the PETM: stable Cr isotopes in planktic foraminifera. In: Geochemistry Group RiP meeting 2013, 14 Mar 2013, Milton Keynes.

Williams, N. H.; Fehr, M. A.; Akram, W. M.; Parkinson, I. J. and Schönbächler, M. (2012). Potential nucleosynthetic sources of the titanium isotope variations in solar system materials. In: 75th Annual Meeting of the Meteoritical Society, 12-17 Aug 2012, Cairns, Australia, p. 5209.

Dixon, Sophie K.; Parkinson, Ian J.; Sexton, Philip; Fehr, Manuela; James, Rachael Helen and Peacock, Caroline (2012). Tracking changes in ocean redox during the PETM using stable chromium isotopes. In: AGU Fall Meeting, 3-7 Dec 2012, San Francisco, CA, USA.

Fehr, Manuela; Parkinson, Ian and Cohen, Anthony (2012). Development of the tellurium stable isotope proxy. In: Geochemistry Group RiP Meeting 2012: Building a Habitable Planet, 15-16 Mar 2012, Milton Keynes, UK.

Dixon, Sophie; Parkinson, Ian; James, Rachael; Fehr, Manuela and Peacock, Caroline (2012). Adsoption of Cr onto Fe and Mn oxy(hydr)oxides: an EXAFS study with implication for using Cr isotopes as a redox proxy. In: Geotraces workshop on ‘Stable isotopes of biologically important trace metals’., 13-14 Sep 2012, Imperial College London, UK.

Bonnand, Pierre; Parkinson, Ian; James, Rachael; Karjalainen, Anne-Mari and Fehr, Manuela (2011). Accurate and precise determination of stable Cr isotope compositions in carbonates by double spike MC-ICP-MS. Journal of Analytical Atomic Spectrometry, 26(3) pp. 528–535.

Harvey, J.; Fehr, M. A.; Sharrock, J. L.; Parkinson, I. J. and James, R. H. (2011). The significance of Li isotope variations in CO chondrites: bulk-rock, inter and intra-chondrule differences. In: 74th Meteoritical Society Meeting, 8-12 Aug 2011, Greenwich, London.

Bonnand, P.; Parkinson, I. J.; James, R. H.; Fehr, M. and Connolly, D. P. (2010). Cr isotopic composition of modern carbonates and seawater. In: American Geophysical Union, Fall Meeting 2019., 13-17 Dec 2010, San Francisco.

Parkinson, I. J.; Bonnand, P.; Pearce, C. R. and Fehr, M. (2010). Application of the generalised power law to double-spike measurements by MC-ICP-MS. In: American Geophysical Union, Fall Meeting 2010., 13-17 Dec 2010, San Francisco.

Sharrock, J. L.; Harvey, J.; Fehr, M.; James, R. and Parkinson, I. (2010). Lithium isotopes as an indicator of primary and secondary processes in unequilibrated meteorites: chondrule cooling and aqueous alteration in CO chondrites. In: American Geophysical Union, Fall Meeting 2010., 13-17 Dec 2010.

Fehr, Manuela A.; Andersson, Per S.; Hålenius, Ulf; Gustafsson, Örjan and Mörth, Carl-Magnus (2010). Iron enrichments and Fe isotopic compositions of surface sediments from the Gotland Deep, Baltic Sea. Chemical Geology, 277(3-4) pp. 310–322.

Magna, T.; Mezger, K. and Fehr, M. (2010). Lithium isotope composition of Mars - corollary of radial heterogeneity in the early Solar System? In: 20th V.M. Goldschmidt Conference, 13-18 Jun 2010, Knoxville, Tennessee, USA.

Bonnand, Pierre; Parkinson, Ian; James, Rachael; Karjalainen, Anne-Mari; Fehr, Manuela and Fairchild, Ian (2010). Detemination of Cr isotopic composition in low-level carbonates by MC-ICP-MS: a sensitive proxy for redox changes? In: European Geosciences Union General Assembly 2010, 2-7 May 2010, Vienna, Austria.

Fehr, Manuela A.; Rehkämper, Mark; Halliday, Alex N.; Hattendorf, Bodo and Günther, Detlef (2009). Tellurium isotope compositions of calcium-aluminum-rich inclusions. Meteoritics and Planetary Science, 44(7) pp. 971–984.

Fehr, M.; James, R.; Sephton, M.; Martins, Z. and Bland, P. A. (2009). Primitive lithium isotope signatures in CR carbonaceous chondrites? In: 19th V.M. Goldschmidt Conference, 21-26 Jun 2009, Davos, Switzerland.

Fehr, Manuela; Andersson, Per S.; Hålenius, Ulf and Mörth, Carl-Magnus (2008). Iron isotope variations in holocene sediments of the Gotland Deep, Baltic Sea. Geochimica et Cosmochimica Acta, 72(3) pp. 807–826.

Fehr, Manuela A.; Rehkämper, Mark; Halliday, Alex N.; Schönbächler, Maria; Hattendorf, Bodo and Günther, Detlef (2006). Search for nucleosynthetic and radiogenic tellurium isotope anomalies in carbonaceous chondrites. Geochimica et Cosmochimica Acta, 70(13) pp. 3436–3448.

Fehr, Manuela A.; Rehkämper, Mark; Halliday, Alex N.; Wiechert, Uwe; Hattendorf, Bodo; Günther, Detlef; Ono, Shuhei; Eigenbrode, Jennifer L. and Rumble III, Douglas (2005). Tellurium isotopic composition of the early solar system - A search for effects resulting from stellar nucleosynthesis, ¹²⁶Sn decay and mass- independent fractionation. Geochimica et Cosmochimica Acta, 69(21) pp. 5099–5112.

Schönbächler, Maria; Rehkämper, Mark; Fehr, Manuela A.; Halliday, Alex N.; Hattendorf, Bobo and Günther, Detlef (2005). Nucleosynthetic zirconium isotope anomalies in acid leachates of carbonaceous chondrites. Geochimica et Cosmochimica Acta, 69(21) pp. 5113–5122.

Fehr, Manuela A.; Rehkämper, Mark and Halliday, Alex N. (2004). Application of MC-ICPMS to the precise determination of tellurium isotope compositions in chondrites, iron meteorites and sulfides. International Journal of Mass Spectrometry, 232(1) pp. 83–94.

Schönbächler, Maria; Lee, Der-Chuen; Rehkämper, Mark; Halliday, Alex N.; Fehr, Manuela A.; Hattendorf, Bobo and Günther, Detlef (2003). Zirconium isotope evidence for incomplete admixing of r-process components in the solar nebula. Earth and Planetary Science Letters, 216(4) pp. 467–481.