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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Nature Portfolio
2017
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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) |
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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 |
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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 |