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
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
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
_version_	1718394339035447296

Organic molecular heterogeneities can withstand diagenesis

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