Jonathan O'neil
Jonathan O'Neil
Associate Professor

Ph.D. McGill University (2009)

ARC 420
(613) 562-5800 ext. 6273

Department of Earth and Environmental Sciences


My research interests are focused on the early Earth and its evolution through time. I am interested in understanding the different geological processes in the Hadean and Archean that shaped our planet. Topics of interest include: the formation and evolution of Earth’s primitive crust; the early differentiation of the silicate portion of the Earth; the evolution and interactions of the early formed geochemical reservoirs.

Selected publications

  • Murphy, D., Rizo, H., O'Neil, J., Hepple, A., Wiemer, D., Kemp, A., Vervoort, J., 2021. Combined Sm-Nd, Lu-Hf, and 142Nd study of Paleoarchean basalts from the East Pilbara Terrane, Western Australia. Chemical Geology, 120301
  • Wasilewski, B., O’Neil, J., Rizo, H., Paquette, J-L. and   Gannoun, M., 2021. Over one billion years of Archean crust evolution revealed by zircon U-Pb and Hf isotopes from the Saglek-Hebron Complex. Precambrian Research, 359
  • O’Neil, J., Carlson, R.W., Papineau, D., Levine, Y.E., Francis, D., 2019. The Nuvvuagittuq greenstone belt: A 1 glimpse of Earth’s earliest crust. In Earth’s Oldest Rocks 2nd Edition, Development in Precambrian geology, Elsevier BV.
  • O’Neil, J. and Carlson, R.W., 2017. Building Archean cratons from Hadean mafic crust. Science, 355 (6330), pp.1199-1202.
  • Dodd, M.S., Papineau, D., Grenne, T., Slack, J.F., Rittner, M., Pirajno, F., O’Neil, J. and Little, C.T., 2017. Evidence for early life in Earth’s oldest hydrothermal vent precipitates. Nature, 543 (7643), pp.60-64.

Research interests

  • Early Earth
  • Hadean
  • Eoarchean
  • Radiogenic isotope geochemistry
  • Extinct isotopic systems
  • Geochronology
  • Crustal evolution
  • Crust-mantle differentiation