Research objectives and methods
Prof. Olivier Namur leads a multidisciplinary research group which investigates magmatic processes on Earth and on terrestrial planets. His research is based on a combination of high-temperature, low- to high-pressure experiments and a detailed textural and geochemical study of natural rocks and is also deeply rooted in thermodynamic and numerical modelling. Recent research project were focused on (1) understanding how fossil layered intrusions crystallise and differentiate; (2) deep magmatic processes beneath basaltic volcanoes and their timescales; (3) magma ocean crystallisation and mantle melting on terrestrial planets (Mercury and the Moon). Many research projects led by Olivier Namur also have an component of economic geology through the study of Fe, Ti, P, Cr, V ore deposits.
In his research, Olivier Namur uses a combination of:
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Experimental methods (one atmosphere gas mixing furnace, piston cylinder, multi-anvil)
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Bulk analytical methods (ICP-MS, XRF, ICP-OES)
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In situ analytical and imaging methods (EPMA, SEM, EDX, LA-ICP-MS, SIMS)
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Thermodynamic and numerical models
Our research focuses on understanding differentiation processes in layered intrusions. We use textural and geochemical methods to constrain how cumulate rocks form, how crystal mushes develop and how interstitial melt moves into the crystal matrix. We also investigate the processes of formation of Fe-Ti-P-Cr-V deposits linked to layered intrusions.
We work on active or recently active volcanoes from various geodynamic settings (intraplate volcanoes, oceanic and continental rift volcanoes, subduction zone volcanoes). Using natural rocks and experiments we investigate the role of primary melt composition as well as the crust thickness and composition on the composition and properties of erupted lavas. We also investigate the timescales of magmatic processes and how they are affected by the presence of volatiles. Detailed in situ analyses of primitive crystals also allow us investigating the heterogeneity of the Earth's mantle.