Engineer Geologist National School of Geology (ENSG) Nancy 1985, Thesis of the National Polytechnic Institute of Lorraine (INPL) 1988, HDR of the INPL 1998. Research Scientist CR2 CNRS in 1988 at the Center for Petrographic and Geochemical Research of Nancy (CRPG-UPR 6821), Research Director DR1 CNRS in 2008 at the CRPG Research Director DR1 CNRS on 1 January 2014 at the Paris Globe Physics Institute (IPGP-UMR 7154) Professor in charge of an incomplete training course at the Ecole Polytechnique (Department of Physics) since 2008. AWARDS Winner of a European Research Council (ERC) grant, 2008 Fellow of the Geochemical Society and the European Association for Geochemistry 2007, and of the Meteoritical Society 2010 Asteroid 7048 named Chaussidon by the International Astronomical Union, 2002. Silver medal of the CNRS, 2002. First prize of the young researcher (2000) by the Lorraine region. Houtermans Medal (1995) European Association of Geochemistry.

My field of research is the study of the formation of the solar system, the Earth and the terrestrial planets, and their "geological" evolution, through the use of isotopic compositions of extraterrestrial samples (meteorites, rocks Lunar, samples brought back by space missions) and land rocks. Recent results include (i) formation of first solids and early rocks in the solar accretion disk and (ii) reconstruction of changes in environmental conditions on Earth in the Precambrian (between 0.5 and 3.8 Ga).