Organic molecular heterogeneities can withstand diagenesis

Abstract Reconstructing the original biogeochemistry of organic fossils requires quantifying the extent of the chemical transformations that they underwent during burial-induced maturation processes. Here, we performed laboratory experiments on chemically different organic materials in order to simu...

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Autores principales: Julien Alleon, Sylvain Bernard, Corentin Le Guillou, Damien Daval, Feriel Skouri-Panet, Maïa Kuga, François Robert
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Publicado: Nature Portfolio 2017
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Acceso en línea:https://doaj.org/article/6413a8cdd59945b9bfa1a296a20596e3
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spelling oai:doaj.org-article:6413a8cdd59945b9bfa1a296a20596e32021-12-02T12:30:36ZOrganic molecular heterogeneities can withstand diagenesis10.1038/s41598-017-01612-82045-2322https://doaj.org/article/6413a8cdd59945b9bfa1a296a20596e32017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01612-8https://doaj.org/toc/2045-2322Abstract Reconstructing the original biogeochemistry of organic fossils requires quantifying the extent of the chemical transformations that they underwent during burial-induced maturation processes. Here, we performed laboratory experiments on chemically different organic materials in order to simulate the thermal maturation processes that occur during diagenesis. Starting organic materials were microorganisms and organic aerosols. Scanning transmission X-ray microscopy (STXM) was used to collect X-ray absorption near edge spectroscopy (XANES) data of the organic residues. Results indicate that even after having been submitted to 250 °C and 250 bars for 100 days, the molecular signatures of microorganisms and aerosols remain different in terms of nitrogen-to-carbon atomic ratio and carbon and nitrogen speciation. These observations suggest that burial-induced thermal degradation processes may not completely obliterate the chemical and molecular signatures of organic molecules. In other words, the present study suggests that organic molecular heterogeneities can withstand diagenesis and be recognized in the fossil record.Julien AlleonSylvain BernardCorentin Le GuillouDamien DavalFeriel Skouri-PanetMaïa KugaFrançois RobertNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Julien Alleon
Sylvain Bernard
Corentin Le Guillou
Damien Daval
Feriel Skouri-Panet
Maïa Kuga
François Robert
Organic molecular heterogeneities can withstand diagenesis
description Abstract Reconstructing the original biogeochemistry of organic fossils requires quantifying the extent of the chemical transformations that they underwent during burial-induced maturation processes. Here, we performed laboratory experiments on chemically different organic materials in order to simulate the thermal maturation processes that occur during diagenesis. Starting organic materials were microorganisms and organic aerosols. Scanning transmission X-ray microscopy (STXM) was used to collect X-ray absorption near edge spectroscopy (XANES) data of the organic residues. Results indicate that even after having been submitted to 250 °C and 250 bars for 100 days, the molecular signatures of microorganisms and aerosols remain different in terms of nitrogen-to-carbon atomic ratio and carbon and nitrogen speciation. These observations suggest that burial-induced thermal degradation processes may not completely obliterate the chemical and molecular signatures of organic molecules. In other words, the present study suggests that organic molecular heterogeneities can withstand diagenesis and be recognized in the fossil record.
format article
author Julien Alleon
Sylvain Bernard
Corentin Le Guillou
Damien Daval
Feriel Skouri-Panet
Maïa Kuga
François Robert
author_facet Julien Alleon
Sylvain Bernard
Corentin Le Guillou
Damien Daval
Feriel Skouri-Panet
Maïa Kuga
François Robert
author_sort Julien Alleon
title Organic molecular heterogeneities can withstand diagenesis
title_short Organic molecular heterogeneities can withstand diagenesis
title_full Organic molecular heterogeneities can withstand diagenesis
title_fullStr Organic molecular heterogeneities can withstand diagenesis
title_full_unstemmed Organic molecular heterogeneities can withstand diagenesis
title_sort organic molecular heterogeneities can withstand diagenesis
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/6413a8cdd59945b9bfa1a296a20596e3
work_keys_str_mv AT julienalleon organicmolecularheterogeneitiescanwithstanddiagenesis
AT sylvainbernard organicmolecularheterogeneitiescanwithstanddiagenesis
AT corentinleguillou organicmolecularheterogeneitiescanwithstanddiagenesis
AT damiendaval organicmolecularheterogeneitiescanwithstanddiagenesis
AT ferielskouripanet organicmolecularheterogeneitiescanwithstanddiagenesis
AT maiakuga organicmolecularheterogeneitiescanwithstanddiagenesis
AT francoisrobert organicmolecularheterogeneitiescanwithstanddiagenesis
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