Speaker: Oliver Shorttle, Department of Earth Sciences, University of Cambridge Title: Rocky planet atmospheres in the solar system and beyond Abstract: Planetary atmospheres potentially record a plethora of processes dating from accretion, early bombardment, and subsequent volcanic growth.  Whether for solar system planets or exoplanets, the present-day composition of atmospheres may therefore be a rich archive of information on their geological history.  In the case of warm rocky planets, those without liquid water at their surface, recycling of the volatile elements constituting the atmosphere into the planet’s interior may be or inefficient or entirely inhibited.  In this case, the atmospheresContinue reading

Speaker: Christoph Burkhardt, Institut für Planetologie, Westfälische Wilhelms-Universität Münster Title: Mode of terrestrial planet formation and heritage of Earth's volatiles: the story from isotope anomalies in meteorites Abstract: As tracers of planetary genetics, isotope anomalies among planetary materials can provide key constraints for unraveling the Solar System’s dynamical evolution, from the collapse of the molecular cloud to the formation of the terrestrial planets. In this lecture I will show how isotope anomalies among meteorites can be used to constrain the origin of Earth’s and Mars’ building blocks, and whether pebble accretion or the classic oligarchic growth regime dominated the accretion ofContinue reading

Speaker: Fabrice Gaillard, CNRS, Orleans Title: Atmophile elements in magma oceans Abstract: The process ruling the fate light volatile elements (life-forming elements, C-H-O-S-N) during the magma ocean stage are important to define since numerous geochemical observations indicate that these were delivered early on planetry systems. Here, combining experimental data and thermodynamic modelling, I will expose two axis of our research on 1- the outgassing of the magma ocean atmosphere and 2- the sequestration of some of these elements in the core. Zoom Meeting Details:  Register in advance for this webinar (registration is required for the first attendance only, you willContinue reading