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Janne Koornneef is an Associate Professor at Vrije Universiteit Amsterdam specializing in Geology and Geochemistry. His research focuses on isotope geochemistry, specifically the composition of the Earth’s mantle and volcanic rocks. He aims to understand the processes that control the compositional variability of lavas, emphasizing melt-fluid related processes in the mantle. His work utilizes multiple isotope systems (U-series, Nd, Sr, Hf, Pb) alongside major and trace element chemistry of mantle volcanic rocks to investigate mantle melting rates, melt transport, source heterogeneity during melting, recycling fluxes in subduction zones, and metasomatism processes related to diamond formation in the subcratonic mantle. Janne has developed analytical techniques utilizing a state-of-the-art mass spectrometer (TRITON-TIMS) to measure small geological samples and has collaborated on optimizing these techniques. He supervises multiple PhD and MSc students, guiding them through research projects that employ these advanced analytical methods. Janne is also the principal investigator for an ERC-STG funded project aimed at quantifying recycling fluxes of Earth surface materials using melt inclusions. He is actively engaged in courses related to geology and geochemistry, sharing his expertise through lectures and scientific contributions.
Administered under the Department of Clinical Psychology for Master's in Clinical and Developmental Psychopathology.