Relative contribution from comets and carbonaceous asteroids to the Earth's volatile budget
Sarah Joiret (U Bordeaux)Cambridge Fluids Network - fluids-related seminars12 March 2024 1:00pmRyle seminar room + ONLINE - Details to be sent by emailRecent models of solar system formation suggest that a dynamical instability among the giant planets happened within the first 100 Myr after disk dispersal, perhaps before the Moon-forming impact. As a direct consequence, a bombardment of volatile-rich impactors may have taken place on Earth before internal and atmospheric reservoirs were decoupled. However, such a timing has been interpreted to potentially be at odds with the disparate inventories of Xe isotopes in Earth's mantle compared to its atmosphere. In this seminar, I will talk about the dynamical effects of an Early Instability on the delivery of carbonaceous asteroids and comets to Earth, and address the implications for the Earth's volatile budget.