MAGE postdoc presentation - MAGE midterm meeting Peter van Thienen D partement de Gophysique Spatiale et Plantaire, Institut de Physique du Globe de Paris Scientific background: 1998: drs. (masters) in geochemistry at Utrecht University specialization: endogenous geochemistry / Earth material sciences thesis topic: petrology, geochemistry and numerical modelling of pyroclastic flows, applied to an Indonesian volcanic complex 2003: PhD in theoretical geophysics/geodynamics at UU thesis topic: geodynamics of the early Earth and our sister planets Mars and Venus, applying parametric and full mantle convection simulations current research topics effects of volatile exchange on long-term dynamical evolution of terrestrial planets in general, with a focus on Mars formation of large volcanic provinces, with a focus on the Tharsis region current research topics effects of volatile exchange on long-term dynamical evolution of terrestrial planets in general, with a focus on Mars formation of large volcanic provinces, with a focus on the Tharsis region rheology very sensitive to water content water removal from mantle by partial melting and melt segregation water introduction into mantle by subduction of hydrated crust partial melting itself is also a function of water content Hirth and Kohlstedt (1996) current research topics effects of volatile exchange on long-term dynamical evolution of terrestrial planets in general, with a focus on Mars formation of large volcanic provinces, with a focus on the Tharsis region rheology very sensitive to water content water removal from mantle by partial melting and melt segregation water introduction into mantle by subduction of hydrated crust partial melting itself is also a function of water content geodynamics chemical differentiation atmosphere/hydrosphere current research topics effects of volatile exchange on long-term dynamical evolution of terrestrial planets in general, with a focus on Mars formation of large volcanic provinces, with a focus on the Tharsis region depth temperaturewater content partial melting = dehydration rehydration simple numerical model: double-diffusive convection viscosity function of water content dehydration rehydration current research topics effects of volatile exchange on long-term dynamical evolution of terrestrial planets in general, with a focus on Mars formation of large volcanic provinces, with a focus on the Tharsis region current state: initial experiments with viscosity only depending on water content next steps: include temperature dependence of viscosity use particle tracers for water content to avoid numerical diffusion test parameter sensitivity current research topics effects of volatile exchange on long-term dynamical evolution of terrestrial planets in general, with a focus on Mars formation of large volcanic provinces, with a focus on the Tharsis region deep mantle phase transitions relation to rifting perovskite phase transition in deep martian mantle? (partial) boundary to convection? current research topics effects of volatile exchange on long-term dynamical evolution of terrestrial planets in general, with a focus on Mars formation of large volcanic provinces, with a focus on the Tharsis region deep mantle phase transitions relation to rifting apparent association of LIPs and rifting on Earth Tharsis and Vallis Marineris chicken and egg question Host institute D partement de Gophysique Spatiale et Plantaire, Institut de Physique du Globe de Paris Getting started in Saint-Maur... a lot of help in getting a place to live, a bank account, etc. which as a consequence went rather smoothly a good computer and required software were quickly acquired Host institute D partement de Gophysique Spatiale et Plantaire, Institut de Physique du Globe de Paris Getting started in Saint-Maur... a lot of help in getting a place to live, a bank account, etc. which as a consequence went rather smoothly a good computer and required software were quickly acquired Working in Saint-Maur... group of very nice and friendly people very pleasant and quiet working environment consideration for personal situation: agreement to work 1 day per week at home in Utrecht Host institute D partement de Gophysique Spatiale et Plantaire, Institut de Physique du Globe de Paris Getting started in Saint-Maur... a lot of help in getting a place to live, a bank account, etc. which as a consequence went rather smoothly a good computer and required software were quickly acquired Working in Saint-Maur... group of very nice and friendly people very pleasant and quiet working environment consideration for personal situation: agreement to work 1 day per week at home in Utrecht One disadvantage of our department... I'm the only one working on mantle convection problems MAGE network: website MAGE network: website MAGE network: website MAGE network: website MAGE network: experiences so far: visit to Nantes: - seminar - meeting people, see what people are doing future: more seminars in other groups ...