S and O functional analysis of aqueously altered carbonaceous chondrites IOM

François-Regis Orthous-Daunay (1) , Eric Quirico (1) , Laurence Lemelle (2) , Pierre Beck (1) , Vincent de Andrade (3) , Alexandre Simionovici (4) , Sylvie Derenne (5) , Bernard Schmitt (1)

1 LPG - Laboratoire de Planétologie de Grenoble
2 LST - Laboratoire de Sciences de la Terre
3 ESRF - European Synchrotron Radiation Facility
4 LGCA - Laboratoire de Géodynamique des Chaines Alpines
5 Bioemco - Biogéochimie et écologie des milieux continentaux

CI1, CM2, CR2 and ungrouped C2 carbonaceous chondrites contain a few percent of insoluble organic matter (IOM) which could provide clues on the organic chemistry of nebular and/or protostellar environments. These chondrites also have experienced complex hydrothermal processes on parent bodies [1-3]. A major issue is the understanding of IOM compositional and structural changes due to hydrothermalism. Chemical variability has been reported among various IOMs, and so far interpreted as the consequence of oxidation processes [4; 5]. The primordial diversity of organic precursors could be also involved.

Domains: Life Sciences [q-bio]; Environmental Sciences

François-Regis Orthous-Daunay, Eric Quirico, Laurence Lemelle, Pierre Beck, Vincent de Andrade, et al.. S and O functional analysis of aqueously altered carbonaceous chondrites IOM. Geochimica et Cosmochimica Acta Supplement, 2009, 73 (13 supplement 1), pp.A975. ⟨10.1016/j.gca.2009.05.023⟩. ⟨insu-00496964⟩