Dr. Chauvel is a CNRS ‘Directrice de Recherche’ (equivalent to Full Professor) at the Institut de Physique du Globe de Paris (IPGP). Her research activities are based on a geochemical approach to quantify global cycles in the Earth. Her primary research goal is the understanding of magma formation with special interest on oceanic island basalts such as the Polynesian Island chains, or on volcanism linked to subduction zones such as in the Antilles. Over the last 10 years, Dr. Chauvel extended her interests to quantify the chemical mass balance between sediments and their sources in continental areas. The overall outcome is (a) a chemical and isotopic budget of the balance between Earth mantle and continental crust, and (b) a chemical balance between input of surface material in subduction zones and output of magmas along island arcs. This mass balance helps to understand the formation and timing of crust formation as well as the amplitude of chemical and isotopic heterogeneities in the mantle.