Overview of the organic matter present in Asuka 12236: a primitive meteorite?

• Main Authors: Serra, Coline, Vinogradoff, Vassilissa, Poinot, Pauline, Duvernay, Fabrice, Le Sergeant d'Hendecourt, Louis, Schmitt-Kopplin, Philippe
• Other Authors: Physique des interactions ioniques et moléculaires (PIIM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Europlanet
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2022
• Subjects: [CHIM]Chemical Sciences; Antarc*; Antarctica
• Online Access: https://hal.science/hal-03868184; https://hal.science/hal-03868184/document; https://hal.science/hal-03868184/file/abstract-coline%20Asuka.pdf; https://doi.org/10.5194/epsc2022-546

International audience Meteorites, which are the remnants of our protoplanetary disk, provide a rich source of chemical information to investigate the origin of organic matter that have fallen on Earth and may have thus contributed to the emergence of life. Among meteorites, carbonaceous chondrites that contain organic matter are among the most primitive materials in the Solar System. Asuka 12236, found in Antarctica in 2012, has been classified as a member of the CM group. According to the first mineralogical analyses (Kimura et al., 2020, Nittler et al., 2021), Asuka 12236 is among the most primitive member of this group showing very few signs of aqueous alteration in its mineralogy.Here, we have performed an overview of the soluble organic matter (SOM) present in this primitive meteorite, and compared it with other carbonaceous chondrites of the same family group. Two types of analysis were carried out on the SOM: a non-targeted analysis and then a targeted one on the basic so-called building blocks of life such as nucleobases and amino acids.