Shock recovery experiments for simulating short duration parent body heating

• Main Authors: Quirico, E., Yabuta, H., Beck, P., Bonal, L., Bardyn, A., Nittler, L.R., Alexander, Conel M.O'D., Carrasco, Nathalie, Szopa, Cyril
• Other Authors: Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ), Hiroshima University, Carnegie Institution for Science, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2019
• Subjects: [SDU]Sciences of the Universe [physics]; Antarctic; Murchison; Antarc*
• Online Access: https://insu.hal.science/insu-03017239; https://insu.hal.science/insu-03017239/document; https://insu.hal.science/insu-03017239/file/EPSC-DPS2019-604-1.pdf

International audience Here we report on shock recovery experiments (5-50 GPa) conducted on two chondrites, Murchison (CM/2.6) and EET 90628 (LL/3.0), and on a tholin sample. We show that those shocks modify the chemical and D/H compositions of Insoluble Organic Matter, as well as its sp2 structure. Comparison with heated C2 chondrites reveal several similarities, but differences as well that question further the actual process that happened on the parent body. Experiments on the tholin sample show that carbonization happens as soon as 5 GPa, but the fast decrease of the D/H composition upon increasing pressure makes it unlikely Ultra Carbonaceous Antarctic Micro-Meteorites were formed through this process.