Sylvain Bernard

Institut de minéralogie, de physique des matériaux et de cosmochimie

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Karim Benzerara

Institut de minéralogie, de physique des matériaux et de cosmochimie

Olivier Beyssac

Institut de minéralogie, de physique des matériaux et de cosmochimie

Corentin Le Guillou

Unité Matériaux et Transformations

Damien Daval

Centre National de la Recherche Scientifique

Laurent Rémusat

Centre National de la Recherche Scientifique

Jean‐Christophe Viennet

Sorbonne Université

François Guyot

Institut de minéralogie, de physique des matériaux et de cosmochimie

O. Forni

Institut de Recherche en Astrophysique et Planétologie

Anders Meibom

University of Lausanne

Sylvain Pont

Institut de minéralogie, de physique des matériaux et de cosmochimie

Cooperative Institutions

Centre National de la Recherche Scientifique

344

Sorbonne Université

120

Jet Propulsion Laboratory

California Institute of Technology

Los Alamos National Laboratory

Université Paris Cité

Centre National d'Études Spatiales

Institut de minéralogie, de physique des matériaux et de cosmochimie

Institut de Recherche pour le Développement

Université Paris-Saclay

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Chemical and structural imaging of fossilized tissues at the nanoscale and assessment of their taphonomy

Geochimica et Cosmochimica Acta Supplement (2009)

Miguel Galvez Karim Benzerara Olivier Beyssac Sylvain Bernard

Taphonomy

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Species-specific foraminiferal ultrastructures modulate surfaces available for diagenesis

Microscopy and Microanalysis (2021)

Deyanira Cisneros-Lazaro Arthur Adams Jinming Guo Sylvain Bernard Damien Daval

An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the 'Save PDF' action button.

10.1017/s1431927621001550

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Citations (2)

Corrigendum to “Low temperature hydrothermal oil and associated biological precursors in serpentinites from Mid-Ocean Ridge” [Lithos 178 (2013) 84–95]

Lithos (2013)

Valerio Pasini Daniele Brunelli Paul Dumas Christophe Sandt Joni Frederick

10.1016/j.lithos.2013.11.018

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Citations (1)

Influence of hydrothermal asteroidal conditions on the molecular structure and isotopic compositions of polycyclic aromatic hydrocarbons

Icarus (2023)

Marceau Lecasble Sylvain Bernard Jean‐Christophe Viennet Isis Criouet Laurent Rémusat

A variety of polycyclic aromatic hydrocarbons (PAHs) are reported in carbonaceous chondrites (CCs) and in the interstellar medium (ISM). Although PAHs in CCs are not as large as those detected in the ISM, their carbon isotope composition is interpreted as pinpointing an interstellar origin. In contrast, their hydrogen isotope composition can be related to the extent of secondary processes, as is the proportion of alkylated PAHs within CCs. Here, we experimentally investigate the molecular and isotopic evolution of PAHs under simulated asteroidal hydrothermal conditions at 150 °C. Results show that PAHs are chemically stable under these conditions whatever their size, i.e. no destruction, conjugation nor alkylation occurs, even in the presence of other reactive organic molecules. Plus, PAHs retain their carbon isotope compositions even in the presence of another carbon-rich reservoir, either organic or inorganic. On the other hand, their hydrogen isotope composition is modified through exchange with water. Of note, as shown by additional experiments, the presence of smectites, abundant in CCs, impacts the relative abundances of extractable PAHs, saponite trapping more efficiently the larger PAHs. Altogether, results of the present experiments show that PAHs of CCs can be used as tracers of both pre-accretion and secondary processes.

Carbon fibers

Carbonaceous chondrite

10.1016/j.icarus.2023.115603

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Impact des processus de fossilisation : étude des crustacés exceptionnellement préservés du Jurassique de La Voulte-sur-Rhône

HAL (Le Centre pour la Communication Scientifique Directe) (2018)

Clément Jauvion Sylvain Bernard Pierre Guériau Sylvain Charbonnier

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Influence of phyllosilicates on the hydrothermal alteration of organic matter in asteroids: Experimental perspectives