Widespread abiotic methane in chromitites

Abstract Recurring discoveries of abiotic methane in gas seeps and springs in ophiolites and peridotite massifs worldwide raised the question of where, in which rocks, methane was generated. Answers will impact the theories on life origin related to serpentinization of ultramafic rocks, and the orig...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	G. Etiope, E. Ifandi, M. Nazzari, M. Procesi, B. Tsikouras, G. Ventura, A. Steele, R. Tardini, P. Szatmari
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9574e5a6822f4bde8257204910bca956
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:9574e5a6822f4bde8257204910bca956
record_format	dspace
spelling	oai:doaj.org-article:9574e5a6822f4bde8257204910bca9562021-12-02T15:08:28ZWidespread abiotic methane in chromitites10.1038/s41598-018-27082-02045-2322https://doaj.org/article/9574e5a6822f4bde8257204910bca9562018-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-27082-0https://doaj.org/toc/2045-2322Abstract Recurring discoveries of abiotic methane in gas seeps and springs in ophiolites and peridotite massifs worldwide raised the question of where, in which rocks, methane was generated. Answers will impact the theories on life origin related to serpentinization of ultramafic rocks, and the origin of methane on rocky planets. Here we document, through molecular and isotopic analyses of gas liberated by rock crushing, that among the several mafic and ultramafic rocks composing classic ophiolites in Greece, i.e., serpentinite, peridotite, chromitite, gabbro, rodingite and basalt, only chromitites, characterized by high concentrations of chromium and ruthenium, host considerable amounts of 13C-enriched methane, hydrogen and heavier hydrocarbons with inverse isotopic trend, which is typical of abiotic gas origin. Raman analyses are consistent with methane being occluded in widespread microfractures and porous serpentine- or chlorite-filled veins. Chromium and ruthenium may be key metal catalysts for methane production via Sabatier reaction. Chromitites may represent source rocks of abiotic methane on Earth and, potentially, on Mars.G. EtiopeE. IfandiM. NazzariM. ProcesiB. TsikourasG. VenturaA. SteeleR. TardiniP. SzatmariNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q G. Etiope E. Ifandi M. Nazzari M. Procesi B. Tsikouras G. Ventura A. Steele R. Tardini P. Szatmari Widespread abiotic methane in chromitites
description	Abstract Recurring discoveries of abiotic methane in gas seeps and springs in ophiolites and peridotite massifs worldwide raised the question of where, in which rocks, methane was generated. Answers will impact the theories on life origin related to serpentinization of ultramafic rocks, and the origin of methane on rocky planets. Here we document, through molecular and isotopic analyses of gas liberated by rock crushing, that among the several mafic and ultramafic rocks composing classic ophiolites in Greece, i.e., serpentinite, peridotite, chromitite, gabbro, rodingite and basalt, only chromitites, characterized by high concentrations of chromium and ruthenium, host considerable amounts of 13C-enriched methane, hydrogen and heavier hydrocarbons with inverse isotopic trend, which is typical of abiotic gas origin. Raman analyses are consistent with methane being occluded in widespread microfractures and porous serpentine- or chlorite-filled veins. Chromium and ruthenium may be key metal catalysts for methane production via Sabatier reaction. Chromitites may represent source rocks of abiotic methane on Earth and, potentially, on Mars.
format	article
author	G. Etiope E. Ifandi M. Nazzari M. Procesi B. Tsikouras G. Ventura A. Steele R. Tardini P. Szatmari
author_facet	G. Etiope E. Ifandi M. Nazzari M. Procesi B. Tsikouras G. Ventura A. Steele R. Tardini P. Szatmari
author_sort	G. Etiope
title	Widespread abiotic methane in chromitites
title_short	Widespread abiotic methane in chromitites
title_full	Widespread abiotic methane in chromitites
title_fullStr	Widespread abiotic methane in chromitites
title_full_unstemmed	Widespread abiotic methane in chromitites
title_sort	widespread abiotic methane in chromitites
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/9574e5a6822f4bde8257204910bca956
work_keys_str_mv	AT getiope widespreadabioticmethaneinchromitites AT eifandi widespreadabioticmethaneinchromitites AT mnazzari widespreadabioticmethaneinchromitites AT mprocesi widespreadabioticmethaneinchromitites AT btsikouras widespreadabioticmethaneinchromitites AT gventura widespreadabioticmethaneinchromitites AT asteele widespreadabioticmethaneinchromitites AT rtardini widespreadabioticmethaneinchromitites AT pszatmari widespreadabioticmethaneinchromitites
_version_	1718388136486109184

Widespread abiotic methane in chromitites

Ejemplares similares