Objetivo Ongoing measurements of the surface of Mercury by the MESSENGER spacecraft (NASA) indicate that it is covered with basaltic lavas unusually rich in sulfur (up to 4 wt.% S). Such values are significantly higher than those reported for any basaltic composition on Earth. Understanding the geochemical cycle of sulfur on Mercury is essential to constrain large-scale processes of planetary differentiation due to volcanic activity, crust-mantle formation, and segregation of a Fe-S-Si core. In this project, the solubility, crystallization and speciation of sulfur in silicate liquids from Mercury will be investigated experimentally and theoretically. Experiments using furnaces and presses will be performed at high temperature (> 1000°C) and for pressure conditions relevant to the Mercury’s crust and mantle (1 bar to 40 kbar). A special design of experimental capsules will be developed to control equilibration under highly reduced conditions similar to those prevailing on Mercury. The key objectives of the project are (1) to precisely estimate the sulfur solubility in Mercury’s silicate liquids as a function of pressure, temperature and oxygen fugacity and (2) to determine phase equilibria and the behavior of sulfur during the crystallization of the Mercury’s basalts. Experimental data and theoretical models produced during this project will allow understanding the processes of Mercury’s differentiation on a global scale as well as determining the likely mantle source of the basalts observed at the surface of the planet. This will be of crucial interest to fully interpret the geochemical and spectral data currently measured by MESSENGER, and those that will be acquired in the near future by the BepiColombo spacecraft of the European Space Agency. Ámbito científico engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringastronautical engineeringspacecraftnatural scienceschemical sciencesinorganic chemistrytransition metalsnatural sciencesphysical sciencesastronomyplanetary sciencesplanets Programa(s) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Tema(s) FP7-PEOPLE-2012-IEF - Marie-Curie Action: "Intra-European fellowships for career development" Convocatoria de propuestas FP7-PEOPLE-2012-IEF Consulte otros proyectos de esta convocatoria Régimen de financiación MC-IEF - Intra-European Fellowships (IEF) Coordinador GOTTFRIED WILHELM LEIBNIZ UNIVERSITAET HANNOVER Aportación de la UE € 161 968,80 Dirección WELFENGARTEN 1 30167 Hannover Alemania Ver en el mapa Región Niedersachsen Hannover Region Hannover Tipo de actividad Higher or Secondary Education Establishments Contacto administrativo François Holtz (Prof.) Enlaces Contactar con la organización Opens in new window Sitio web Opens in new window Coste total Sin datos
