Straight out of the asteroid belt to the Nuclear Resonance beamline at the ESRF.

The Hayabusa 2 (HY2) and OSIRIS-Rex (O-Rex) missions returned to Earth, for the first time in History, samples from carbonaceous primitive asteroids. We recently conducted experiments at the Mössbauer Beamline of the APS and demonstrated that we can identify minerals and unravel redox evolution on such asteroidal materials using Nuclear Forward Scattering. Based on these results, pivotal information on the formation conditions of iron-bearing phases have been proposed but cannot be confirmed without measurements performed using a highly focussed and bright Synchrotron Mössbauer Source at low temperature. This setup is only available on ID14 (ESRF). We propose to analyse HY2 and O-Rex samples (loaned by JAXA and NASA) together with meteoritical analogues, to unravel the formation conditions of clay and oxide minerals present in these unique asteroidal samples. This will allow us to put firm constaints on the mineral carriers of water and oxidized materials during planets formation.