Unveiling microbial preservation under hyperacidic and oxidizing conditions in the Oligocene Rio Tinto deposit

Abstract The preservation of biosignatures on Mars is largely associated with extensive deposits of clays formed under mild early Noachian conditions (> 3.9 Ga). They were followed by widespread precipitation of acidic sulfates considered adverse for biomolecule preservation. In this paper, an ex...

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Autores principales:	David C. Fernández-Remolar, Daniel Carrizo, Mourad Harir, Ting Huang, Ricardo Amils, Philippe Schmitt-Kopplin, Laura Sánchez-García, David Gomez-Ortiz, Per Malmberg
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/26197629eef64f789d4a7935066f9aa0
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spelling	oai:doaj.org-article:26197629eef64f789d4a7935066f9aa02021-11-08T10:53:43ZUnveiling microbial preservation under hyperacidic and oxidizing conditions in the Oligocene Rio Tinto deposit10.1038/s41598-021-00730-82045-2322https://doaj.org/article/26197629eef64f789d4a7935066f9aa02021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-00730-8https://doaj.org/toc/2045-2322Abstract The preservation of biosignatures on Mars is largely associated with extensive deposits of clays formed under mild early Noachian conditions (> 3.9 Ga). They were followed by widespread precipitation of acidic sulfates considered adverse for biomolecule preservation. In this paper, an exhaustive mass spectrometry investigation of ferric subsurface materials in the Rio Tinto gossan deposit (~ 25 Ma) provides evidence of well-preserved molecular biosignatures under oxidative and acidic conditions. Time of flight secondary ion mass spectrometry (ToF–SIMS) analysis shows a direct association between physical-templating biological structures and molecular biosignatures. This relation implies that the quality of molecular preservation is exceptional and provides information on microbial life formerly operating in the shallow regions of the Rio Tinto subsurface. Consequently, low-pH oxidative environments on Mars could also record molecular information about ancient life in the same way as the Noachian clay-rich deposits.David C. Fernández-RemolarDaniel CarrizoMourad HarirTing HuangRicardo AmilsPhilippe Schmitt-KopplinLaura Sánchez-GarcíaDavid Gomez-OrtizPer MalmbergNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-23 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q David C. Fernández-Remolar Daniel Carrizo Mourad Harir Ting Huang Ricardo Amils Philippe Schmitt-Kopplin Laura Sánchez-García David Gomez-Ortiz Per Malmberg Unveiling microbial preservation under hyperacidic and oxidizing conditions in the Oligocene Rio Tinto deposit
description	Abstract The preservation of biosignatures on Mars is largely associated with extensive deposits of clays formed under mild early Noachian conditions (> 3.9 Ga). They were followed by widespread precipitation of acidic sulfates considered adverse for biomolecule preservation. In this paper, an exhaustive mass spectrometry investigation of ferric subsurface materials in the Rio Tinto gossan deposit (~ 25 Ma) provides evidence of well-preserved molecular biosignatures under oxidative and acidic conditions. Time of flight secondary ion mass spectrometry (ToF–SIMS) analysis shows a direct association between physical-templating biological structures and molecular biosignatures. This relation implies that the quality of molecular preservation is exceptional and provides information on microbial life formerly operating in the shallow regions of the Rio Tinto subsurface. Consequently, low-pH oxidative environments on Mars could also record molecular information about ancient life in the same way as the Noachian clay-rich deposits.
format	article
author	David C. Fernández-Remolar Daniel Carrizo Mourad Harir Ting Huang Ricardo Amils Philippe Schmitt-Kopplin Laura Sánchez-García David Gomez-Ortiz Per Malmberg
author_facet	David C. Fernández-Remolar Daniel Carrizo Mourad Harir Ting Huang Ricardo Amils Philippe Schmitt-Kopplin Laura Sánchez-García David Gomez-Ortiz Per Malmberg
author_sort	David C. Fernández-Remolar
title	Unveiling microbial preservation under hyperacidic and oxidizing conditions in the Oligocene Rio Tinto deposit
title_short	Unveiling microbial preservation under hyperacidic and oxidizing conditions in the Oligocene Rio Tinto deposit
title_full	Unveiling microbial preservation under hyperacidic and oxidizing conditions in the Oligocene Rio Tinto deposit
title_fullStr	Unveiling microbial preservation under hyperacidic and oxidizing conditions in the Oligocene Rio Tinto deposit
title_full_unstemmed	Unveiling microbial preservation under hyperacidic and oxidizing conditions in the Oligocene Rio Tinto deposit
title_sort	unveiling microbial preservation under hyperacidic and oxidizing conditions in the oligocene rio tinto deposit
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/26197629eef64f789d4a7935066f9aa0
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Unveiling microbial preservation under hyperacidic and oxidizing conditions in the Oligocene Rio Tinto deposit

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