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Dr Romain Guilbaud

Dr Romain Guilbaud

Research Associate


Office Phone: +44 (0) 1223 333452


MSc Geology, University of Grenoble (France)

PhD Experimental Isotope Geochemistry, University of Edinburgh (UK)

Post-doc Biogeochemistry of the Neoproterozoic, Newcaslte University then University of Leeds (UK)

Post-doc Biogeochemistry of the Ediacaran-Cambrian transition, University of Cambridge (UK)

Research Interests

My research interests broadly focus on understanding the evolution of the Earth’s environment and the biogeochemical processes which shaped the atmosphere-oceanbiosphere system through time. My current research is interdisciplinary, and combines a range of (bio)geochemical, geological, and isotopic approaches to tackle issues related to major events throughout the history of the Earth’s surface. This, of course, involves detailed laboratory experiments which target the kinetics and the mechanisms of specific (bio)geochemical reactions, combined with the study of modern biogeochemical cycles and their archiving during diagenesis. Together, these approaches permit to reconcile some significant geochemical signatures of the rock record in order to gain a better understanding of past, present and future biogeochemical cycles.

Research Supervision

Yijun Xiong, University of Leeds. "Nutrient cycling in modern anoxic systems".

Jenny Thompson, University of Leeds. "Nutrient and trace metal uptake and sequestration during Fe mineralization under anoxic conditions"

Key Publications

  • Guilbaud, R., Poulton, S.W., Butterfield, N.J., Zhu, M., Shields-Zhou, G.A. A global transition to ferruginous conditions in the early Neoproterozoic oceans. Nature Geoscience 8, 466-470.
  • Wood, R., Prave, A., Hoffmann, K-H., Clarkson, M., Guilbaud, R., Lyne, J., Tostevin, R., Bowyer, F., Penny, A., Curtis, A., Kasemann, S., Poulton, S. Dynamic redox conditions control late Ediacaran ecosystems in the Nama Group, Namibia. Precambrian Research 261, 252-271.
  • Clarkson, M.O., Poulton, S.W., Guilbaud, R., Wood, R.A. 2014. Assessing the utility of Fe/Al and Fe-speciation to record water column redox conditions in carbonate-rich sediments. Chemical Geology 382, 111-122.
  • Guilbaud, R., White, M.L., Poulton, S.W., 2013. Surface charge and growth of sulphated and carbonated green rust in aqueous media. Geochim. Cosmochim. Act. 108, 141-153.
  • Guilbaud, R., Butler, I.B., Ellam, R.M., 2012. Response to Comment on “Abiotic pyrite formation produces a large Fe isotope fractionation”. Technical Comment. Science, 335, 538.
  • Guilbaud, R., Bernet, M., Erens, V., Chirouze, F., Huyghe, P., Dupont-Nivet, G., 2012. On the influence of diagenesis on the original petrographic composition of Miocene-Pliocene fluvial sandstone in the Himalayan foreland basin of western-central Nepal. Journal of Asian Earth Sciences 44, 107-116.
  • Guilbaud, R., Butler, I.B., Ellam, R.M., 2011. Abiotic pyrite formation produces a large Fe isotope fractionation. Science, 332, 1548.
  • Guilbaud, R., Butler, I.B., Ellam, R.M., Rickard, D., Oldroyd, A., 2011. Experimental determination of the equilibrium Fe isotope fractionation between Fe2+aq and FeSm (mackinawite) at 25°C and 2°C. Geochim. Cosmochim. Act. 75, 2721-2734.
  • Guilbaud, R., Butler, I.B., Ellam, R.M., Rickard, D., 2010. Fe isotope exchange between Fe(II)aq and nanoparticulate mackinawite (FeS­m­) during nanoparticle growth. Earth Planet. Sc. Let., 300, 174-183.
  • Guilbaud, R., Ellam, R.M., Butler, I.B., Gallagher, V., Keefe, K., 2010. A procedural development for the analysis of 56/54Fe and 57/54Fe isotope ratios with new generation IsoProbe MC-ICP-MS. Journal Analyt. Atom. Spect., 25, 1598-1604.
  • Huyghe, P., Guilbaud, R., Bernet, M., Galy, A., Gajurel, A., 2010. Significance of the clay mineral distribution in fluvial sediments of the Neogene and Recent Himalayan Foreland Basin (western-central Nepal). Basin Research, 23(3), 332-345.