We assessed biogenic versus abiotic trends in insoluble organic matter (IOM) obtained from samples of three diverse, well-constrained provenances. We analyzed 33 extraterrestrial carbonaceous chondrites, 16 terrestrial microbial-derived kerogens, and 9 terrestrial plant-derived coals using different analytical techniques (confocal Raman imaging spectroscopy and elemental and isotopic mass spectrometry analysis), and petrological characterization. We explored relationships in the IOM across sample type, sample provenance, molecular structure, elemental heteroatom abundances, and alteration history in these sample types in an effort to reveal discriminatory signatures of biotic (in terrestrial coals and kerogens) versus abiotic origins (in pristine meteorites and synthetic materials) as well as alteration history. Finally we assessed on different materials the type of alteration occurring and ways to initiate their differentiation from elementary and molecular spectrometry analysis.
La chimie radiative est l’ange caché et la chimie de l’eau est le démon caché
Lundi 1er juin 2026
de
16:00 à
17:00
Salle 204 - Bâtiment 18 - Visio
