SPS Seminar - “Hydrothermal experiment & oxygen isotopes in carbonates: Implications for the physicochemical conditions of aqueous alteration in CM parent bodies”

Abstract

Carbonaceous asteroids (C-type) were affected by aqueous alteration processes that have strongly modified their primary mineralogy in favour of a wide diversity of newly formed phases. Despite the numerous studies carried out on hydrated chondrites (CM chondrites), the physicochemical conditions of aqueous alteration and the identification of the water sources accreted by asteroids are still poorly constrained. From the mineralogical and isotopic survey of secondary phases (carbonate and phyllosilicates), I will try to retrace the physicochemical conditions of aqueous alteration using two different approaches: (i) oxygen isotopes on Ca-carbonates and (ii) hydrothermal laboratory experiments from the aqueous alteration of synthetic assemblage analogous to matrix minerals of CM chondrites.

Bio

“I'm currently a Postdoctoral Research Associate in the Department of Physics at Washington University in St. Louis USA since January 2019. My primary research interests include “primitive” meteorites, the origin of water in the Solar System, the effects of water on meteorite chemistry, sulfur isotopes and hydrothermal experiments. I defended my PhD in November 2018 at the CRPG laboratory (Nancy, France) supervised by Dr. Yves Marrocchi. The title of my thesis manuscript was: "Early Hydration and Isotopic Evolution of Carbonaceous Asteroids: Experimental and Isotopic Approaches". I'm now looking for a research job opportunity in France.”