Noble gas storage capacity of bridgmanite and the outgassing history of the Earth

The outgassing history of the Early Earth remains a key topic in geoscience because the presence of volatile species in its interior,
such as H2O, CO2, has a strong influence on its dynamics and evolution. We know that most of volatiles have been outgassed from the uppermost Earth's mantle while a significant fraction of volatiles have never been outgassed from the deeper Earth. The location of these deep volatiles remains highly debated. The solid Earth's lower mantle is one potential candidate, but the few literature data on noble gases solubilities in its main constituent, bridgmanite, concern mainly Ar and are controversial. Data on heavy noble gases at relevant conditions are required to validate or reject the scenario. Here, we propose a new approach to constrain the amount of Kr and Xe retained in bridgmanite at relevant conditions (25-130 GPa, 2000-4000 K) based on quantitative in-situ µXRF and single crystal XRD measurements in the LHDAC at high dilution levels.