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Fabien Humbert

Postdoctoral fellow
Name: Fabien Humbert
Location: C1 Lab 446 Auckland Park Kingsway Campus
  Staff Members

Contact Details:
Tel: +27 (0)11 559 4737

Email: fhumbert@uj.ac.za

About Dr Fabien Humbert

​CURRENT PROJECTS

  • Mesoarchean to present geochemical comparisons of mafic igneous units in the Kaapvaal craton; implications for the evolution of the subcontinental lithosphere. Collaborators: M.A. Elburg, A. Agangi (UJ)
  • Did the Neoarchean – Paleoproterozoic Transvaal and Griqualand basins (Kaapvaal craton) have coeval evolutions? Collaborators: M.A. Elburg, A. Agangi, M. Massuyeau, M.O. de Kock (UJ); W. Altermann (UP)
  • Structural, geochemical, paleomagnetic characterization and dating of the Proterozoic mafic sills and dykes intruding the iron ores in the Kalahari Manganese Field (South Africa): timing of the iron mineralization. Collaborators: N. Beukes, H. Wabo, M.O. de Kock (UJ); W. Altermann (UP)
  • Fungus-like mycelial fossils in 2.2-billion-year-old variolitic basalt (Hekpoort Formation), in the Kaapvaal craton. Collaborators: S. Bengtson (SMNH); M. Ivarsson, B. Rasmussen (Curtin University)
  • Paleomagnetism, geochemical study and chronology of marginal sills of the Bushveld Complex (Kaapvaal craton). Collaborations: H. Wabo, N. Beukes, M.O. de Kock (UJ)

 

RESEARCH INTERESTS

Studied areas:

Mafic/intermediate igneous rocks, Archaean/Proterozoic cratons, accretionary prisms, foreland deep drilling, Tethyan ophiolites, rifting zones

Research themes:

  • Field work (structural geology, sample collection)
  • Petrology: microstructural and textural analysis (microscope, SEM); petrological studies and equilibrium conditions (microprobe, Perple_X modeling); clay characterization
  • Geochemistry: whole rock geochemistry (major/trace elements), Sm-Nd – Lu-Hf isotopes
  • Paleomagnetism and magnetic mineralogy (3-axis thermal demagnetization; MPMS; hysteresis cycles; thermal evolution of susceptibility (KT)).
  • Characterization and quantification of diffuse and/or localized deformation by the anisotropy of physical properties at sample scale (AMS, AARM, APV,….).

SCIENTIFIC PUBLICATIONS

  • Humbert, F., de Kock, M.O., Altermann, W., Lenhardt, N., 2019. Neoarchean to early Paleoproterozoic within-plate volcanism of the Kaapvaal Craton: comparing the Ventersdorp Supergroup and the Ongeluk and Hekpoort formations (Transvaal Supergroup). In A. Kröner and A. Hofmann (eds.), The Archaean Geology of the Kaapvaal Craton, Southern Africa, Regional Geology Reviews. Springer Nature Switzerland, p. 347-372. https://doi.org/10.1007/978-3-319-78652-0_11
  • Wabo, H., Humbert, F., de Kock, M.O., Belyanin, G., Maré, L.P., Beukes N.J., Kramers, J., 2019. Constraining the chronology of the Mashishing dykes from the eastern Kaapvaal craton in South Africa. In: Srivastava R., Ernst R., Peng P. (eds) Dyke Swarms of the World: A Modern Perspective. Springer Geology, p215-261. https://doi.org/10.1007/978-981-13-1666-1_6
  • Humbert., F., de Kock, M., Altermann, W., Elburg, M.A., Lenhardt, N., Smith, A.J.B., 2018. Petrology, physical volcanology and geochemistry of a Paleoproterozoic large igneous province: The Hekpoort Formation in the southern Transvaal sub-basin (Kaapvaal Craton). Precambrian Research 315, 232–256. https://doi.org/10.1016/j.precamres.2018.07.022
  • Humbert., F., Elburg, M.A., Ossa Ossa, F., de Kock, M.O., Robion, P., 2018. Variolites of the Paleoproterozoic Hekpoort Formation (Transvaal sub-basin, Kaapvaal craton): multistage undercooling textures? Lithos 316–317, 48–65. https://doi.org/10.1016/j.lithos.2018.07.004
  • Wabo, H., Maré, L.P., Beukes, N.J., Kruger, S.J., Humbert, F., de Kock., M.O., 2018. Mineral transformations during thermal demagnetization of sideritic jasper mesobands in jaspilites of the ~3.25 Ga Fig Tree Group in the Barberton Greenstone Belt, Kaapvaal craton (South Africa). South African Journal of Geology 121, 131-140. https://doi.org/10.25131/sajg.121.0010
  • Humbert, F., Sonnette, L., de Kock, M.O., Robion, P., Horng, C.S, Cousture, A., Wabo, H., 2017. Paleomagnetism of the early Paleoproterozoic, volcanic Hekpoort Formation (Transvaal Supergroup) of the Kaapvaal craton, South Africa. Geophysical Journal International 209, 842–865. https://doi.org/10.1093/gji/ggx055
  • Wabo, H., Olsson, J.R., De Kock, M.O., Humbert, F., Söderlund, U., 2016. New U-Pb age and paleomagnetic constraints from the Uitkomst Complex, South Africa: clues to the timing of intrusion. Journal of the Geological Society of Sweden 138 – Issue 1: New advances in using Large Igneous Provinces (LIPs) to reconstruct ancient supercontinents. https://doi.org/10.1080/11035897.2015.1099566
  • Humbert, F., Louis, L., Robion, P., 2014. Method for estimating ductile horizontal strain from magnetic fabrics in poorly consolidated clay-rich sediments. Tectonophysics 629, p. 335–352. https://doi.org/10.1016/j.tecto.2014.07.003
  • Sonnette, L., Humbert, F., Aubourg, C., Gattacceca, J., Lee, J.C., Angelier, J., 2014. Significant rotations related to cover–substratum decoupling: example of the Dôme de Barrôt (south-western Alps, France). Tectonophysics 629, p. 275-289. https://doi.org/10.1016/j.tecto.2014.04.009
  • Whitechurch, H., Omrani, J., Agard, P., Humbert, F., Montigny, R., Jolivet, L., 2013. Evidence for Paleocene–Eocene evolution of the foot of the Eurasian margin (Kermanshah ophiolite, SW Iran) from back-arc to arc: Implications for regional geodynamics and obduction. Lithos 182-183, p11-32. http://dx.doi.org/10.1016/j.lithos.2013.07.017
  • Humbert, F., Louis, L., Robion, P., Barnes, C., David, C., 2012. Variation of shear-wave fast polarization direction TCDP sandstone: evidence of in situ microcrack opening. Journal of Asian Earth Sciences 52, p63–72. http://dx.doi.org/10.1016/j.jseaes.2012.02.012
  • Robion, P., Humbert, F., Colombier, J.C., Leghay, S., Frizon de Lamotte, D., 2012. Relationships between pore space anisotropy and anisotropy of physical properties of silicoclastic rocks from the Corbières–Minervois fold-and-thrust-belt (north-east Pyrenees, France). Tectonophysics 576–577, p63–77. http://dx.doi.org/10.1016/j.tecto.2012.03.004
  • Louis, L., Humbert, F., Robion, P., Henry, P., Knuth, M., Likos W., 2012. Joint analysis of acoustic and magnetic susceptibility anisotropies in the Nankai accretionary prism. Proceedings of the Integrated Ocean Drilling Program in expedition 314, 315 and 316. http://dx.doi.org/10.2204/iodp.proc.314315316.216.2012
  • Humbert, F., Robion, P., Louis, L., Bartier, D., Ledésert, B., 2011. Magnetic evidence for in situ microcrack opening in TCDP sandstone. Journal of Asian Earth Sciences 45, p179–189. http://dx.doi.org/10.1016/j.jseaes.2011.10.009