Molecular Characterization of Gloecapsomorpha ...
Document type :
Communication dans un congrès avec actes
Title :
Molecular Characterization of Gloecapsomorpha Prisca Microfossils by Mass Spectrometry Down to the Cellular Scale
Author(s) :
Bon, Mathilde [Auteur]
Universiteit Gent = Ghent University = Université de Gand [UGENT]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Lepot, Kévin [Auteur]
Institut universitaire de France [IUF]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Carpentier, Yvain [Auteur]
Physique Moléculaire aux Interfaces [PMI]
Bray, Fabrice [Auteur]
Miniaturisation pour la Synthèse, l’Analyse et la Protéomique - UAR 3290 [MSAP]
Riboulleau, Armelle [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Baudin, François [Auteur]
Institut des Sciences de la Terre de Paris [iSTeP]
Nuns, Nicolas [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Rolando, Christian [Auteur]
Miniaturisation pour la Synthèse, l’Analyse et la Protéomique - UAR 3290 [MSAP]
Steemans, Philippe [Auteur]
Paléobotanique, Paléopalynologie, Micropaléontologie (Liège, Belgium)
Vandenbroucke, Thijs R. A. [Auteur]
Universiteit Gent = Ghent University = Université de Gand [UGENT]
Universiteit Gent = Ghent University = Université de Gand [UGENT]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Lepot, Kévin [Auteur]
Institut universitaire de France [IUF]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Carpentier, Yvain [Auteur]
Physique Moléculaire aux Interfaces [PMI]
Bray, Fabrice [Auteur]
Miniaturisation pour la Synthèse, l’Analyse et la Protéomique - UAR 3290 [MSAP]
Riboulleau, Armelle [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Baudin, François [Auteur]
Institut des Sciences de la Terre de Paris [iSTeP]
Nuns, Nicolas [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Rolando, Christian [Auteur]
Miniaturisation pour la Synthèse, l’Analyse et la Protéomique - UAR 3290 [MSAP]
Steemans, Philippe [Auteur]
Paléobotanique, Paléopalynologie, Micropaléontologie (Liège, Belgium)
Vandenbroucke, Thijs R. A. [Auteur]
Universiteit Gent = Ghent University = Université de Gand [UGENT]
Conference title :
31st International Meeting on Organic Geochemistry (IMOG 2023)
City :
Montpellier
Country :
France
Start date of the conference :
2023-09-10
Publisher :
European Association of Geoscientists & Engineers
English keyword(s) :
mass spectrometry
micropaleontology
geobiochemistry
acritarchs
kukersite
micropaleontology
geobiochemistry
acritarchs
kukersite
HAL domain(s) :
Chimie
English abstract : [en]
Gloeocapsomorpha prisca (Fig. 1) is a microfossil (∼10µm) with an organic wall of uncertain biological affinity, probably a cyanobacterium1,2,4,6. This fossil microorganism constitutes the vast majority of the organic ...
Show more >Gloeocapsomorpha prisca (Fig. 1) is a microfossil (∼10µm) with an organic wall of uncertain biological affinity, probably a cyanobacterium1,2,4,6. This fossil microorganism constitutes the vast majority of the organic matter in “kukersite” rocks. G. prisca has been thoroughly studied by gas chromatography-mass spectrometry (GC-MS), using extractive techniques, chemolysis and pyrolysis1,2,3. Here we perform a pilot study in order to investigate the potential of laser-assisted mass spectrometry to analyze the molecular fingerprint of single microfossils. Bitumen and kerogen of a kukersite sample from a 460-million-year-old deposit of northwestern Russia5, were analyzed after organic solvent extractions and demineralization. We measure bulk thermo-desorption and pyrolysis parameters with Rock-Eval 7S. We use molecular characterization methods that allow analyses down to the scale of a single microfossil. We analyze kerogen by secondary ion time-of-flight mass spectrometry (ToF-SIMS), which combines extreme surface sensitivity with a spatial resolution of ∼1 µm. The kerogen is then analyzed with high resolution (HR-µL2-MS) two-step laser desorption-ionization mass spectrometry with a spatial resolution of 140 µm. We used very-high mass resolution Fourier transform ion cyclotron resonance mass spectrometry by laser desorption/ionization (LDI-FT-ICR-MS) on G. prisca aggregates (e.g., Fig. 1) with laser beams down to less than 20 µm.Show less >
Show more >Gloeocapsomorpha prisca (Fig. 1) is a microfossil (∼10µm) with an organic wall of uncertain biological affinity, probably a cyanobacterium1,2,4,6. This fossil microorganism constitutes the vast majority of the organic matter in “kukersite” rocks. G. prisca has been thoroughly studied by gas chromatography-mass spectrometry (GC-MS), using extractive techniques, chemolysis and pyrolysis1,2,3. Here we perform a pilot study in order to investigate the potential of laser-assisted mass spectrometry to analyze the molecular fingerprint of single microfossils. Bitumen and kerogen of a kukersite sample from a 460-million-year-old deposit of northwestern Russia5, were analyzed after organic solvent extractions and demineralization. We measure bulk thermo-desorption and pyrolysis parameters with Rock-Eval 7S. We use molecular characterization methods that allow analyses down to the scale of a single microfossil. We analyze kerogen by secondary ion time-of-flight mass spectrometry (ToF-SIMS), which combines extreme surface sensitivity with a spatial resolution of ∼1 µm. The kerogen is then analyzed with high resolution (HR-µL2-MS) two-step laser desorption-ionization mass spectrometry with a spatial resolution of 140 µm. We used very-high mass resolution Fourier transform ion cyclotron resonance mass spectrometry by laser desorption/ionization (LDI-FT-ICR-MS) on G. prisca aggregates (e.g., Fig. 1) with laser beams down to less than 20 µm.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :
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