Seminar – Laurette Piani

Speaker: LAURETTE PIANI, CRPG Nancy

Title: Distribution of water in the inner Solar System and interest for the origin of water on Earth

Abstract:Hydrogen is the most abundant element of the Solar System; nonetheless its distribution and evolution in the protoplanetary disk and planetary materials remain fairly unknown. As a striking example, the origin of Earth’s hydrogen -and thus water- is one of the most puzzling issues. Chondrites are rocky fragments of asteroids that formed at different times and heliocentric distances in the protoplanetary disk. By studying hydrogen in chondrites from different classes and groups, we can have a window on the water distribution at the time of the planet formation. In this talk, I will present recent works on hydrogen in chondrites that allow us to discuss the origin of the hydrogen isotopic distribution in the Solar System and implications for the Earth’s water budget.