Coralie Siegel

Postdoctoral Fellow in Geochemistry

My research interests and expertise lie in geothermal energy exploration, U- Pb geochronology of accessory minerals (zircon, rutile, apatite and titanite), igneous petrology, geochemistry, and crustal evolution. In my academic career, I have worked on several projects aiming to unravel the nature of the crustal basement beneath thick sedimentary cover. I utilise multidisciplinary techniques including the merging and interrogation of existing datasets, stochastic 1D thermal modelling, field work, GIS techniques, U-Pb geochronology, Hf and O isotopes in zircons, petrography, and whole-rock chemistry.

For Deep Earth Imaging, I am undertaking 1D reactive transport models to 1) test hypotheses of ore-forming processes for sediment-hosted Pb-Zn deposits, and 2) predict their associated metasomatic assemblages to better define exploration vectors. A separate project undertaken in collaboration with Geoscience Australia focusses on the development of a methodology to infer the fluid composition associated with metasomatism and ore-deposition in the Mount Isa and greater McArthur Basin.


Technical skills

  • Hands-on experience in numerical modelling and GIS techniques
  • Ability to compile and merge datasets, and integrate results of a model with geological and geophysical information
  • Solid understanding of processing LA-ICP-MS U-Pb geochronological data
  • Strong laboratory skills: e.g. LA-ICP-MS, SEM-EDS(-CL), XRF, EPMA
  • Geochemical modelling: Fluid-rock interaction (HcH, GWB, PhreeqC); Igneous processes (MELTS, Petrolog)
  • Programming abilities: Python and Matlab



Professional experience

November 2017 – present
Postdoctoral fellow: CSIRO Deep Earth Imaging Future Science Platform

June 2015 – October 2017
Postdoctoral fellow: Queensland University of Technology Australia

March 2015 – June 2017
Project officer: Queensland University of Technology Australia

Associate lecturer: Queensland University of Technology Australia



PhD (Geology) Queensland University of Technology Australia (2015)

MSc (Geology) University Joseph Fourier France (2008)

BS (Geology) University Joseph Fourier (France)


Selected publications

Cross A., Purdy D., Champion D., Brown D., Siégel C. and Armstrong R. (2018). Insights into the evolution of the Thomson Orogen from geochronology, geochemistry and zircon isotopic studies of magmatic rocks. Australian Journal of Earth Sciences, 65(7-8), 987-1008 (special issue).

Siégel C., Bryan S.E., Allen C.M., Purdy D.J., Cross A.J. and Gust D.A. (2018). Crustal and thermal structure of the Thomson Orogen: constraints from the geochemistry, zircon U-Pb age, and Hf and O isotopes of subsurface granitic rocks. Australian Journal of Earth Sciences, 65(7-8), 967-986 (special issue).

Siégel C., Bryan S.E., Allen C.M. and Gust D.A. (2018) Use and abuse of zircon-based parameters: a critical review and a recommended approach to identify antecrystic zircons. Earth Science Reviews, 176, 87-116.

Löhr S.C., Murphy D.T., Nothdurft L.D., Bolhar R., Piazolo S. and Siégel C. (2017). The origin of maghemite-rich soil nodules – implications for fire-driven mineralogical and geochemical differentiation at the Earth’s surface. Geochimica et Cosmochimica Acta, 200, 25-41.

Siégel C., Arndt N.T., Barnes S.J. Henriot A-L., Haenecour P., Debaille C. and Mattielli N. (2014). Fred’s Flow (Canada) and Murphy Well (Australia): thick komatiitic lava flows with contrasting compositions, emplacement mechanisms and water contents. Contribution to Mineralogy and Petrology, 168(6),1-17.

Siégel C., Schrank C.E., Bryan S.E., Beardsmore G.R., Purdy D.J. and Uysal T.I. (2014). Heat-producing crust regulation of subsurface temperatures: A stochastic model re-evaluation of the geothermal potential in southwestern Queensland, Australia. Geothermics, 51, 182-200.

Bryan S.E., Cook A.G., Allen C.M., Siégel C., Purdy D.J., Greentree J.S. and Uysal T.I. (2012). Early-Mid Cretaceous tectonic evolution of eastern Gondwana: from Silicic LIP magmatism to continental rupture. Episodes, 35(1) 142-152