Insights on the deep carbon cycle from the electrical conductivity of carbon-bearing aqueous fluids

Abstract The dehydration and decarbonation in the subducting slab are intricately related and the knowledge of the physical properties of the resulting C–H–O fluid is crucial to interpret the petrological, geochemical, and geophysical processes associated with subduction zones. In this study, we inv...

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Autores principales:	Geeth Manthilake, Mainak Mookherjee, Nobuyoshi Miyajima
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d0327876c88542b6bee55e79876cc8ca
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spelling	oai:doaj.org-article:d0327876c88542b6bee55e79876cc8ca2021-12-02T13:30:17ZInsights on the deep carbon cycle from the electrical conductivity of carbon-bearing aqueous fluids10.1038/s41598-021-82174-82045-2322https://doaj.org/article/d0327876c88542b6bee55e79876cc8ca2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82174-8https://doaj.org/toc/2045-2322Abstract The dehydration and decarbonation in the subducting slab are intricately related and the knowledge of the physical properties of the resulting C–H–O fluid is crucial to interpret the petrological, geochemical, and geophysical processes associated with subduction zones. In this study, we investigate the C–H–O fluid released during the progressive devolatilization of carbonate-bearing serpentine-polymorph chrysotile, with in situ electrical conductivity measurements at high pressures and temperatures. The C–H–O fluid produced by carbonated chrysotile exhibits high electrical conductivity compared to carbon-free aqueous fluids and can be an excellent indicator of the migration of carbon in subduction zones. The crystallization of diamond and graphite indicates that the oxidized C–H–O fluids are responsible for the recycling of carbon in the wedge mantle. The carbonate and chrysotile bearing assemblages stabilize dolomite during the devolatilization process. This unique dolomite forming mechanism in chrysotile in subduction slabs may facilitate the transport of carbon into the deep mantle.Geeth ManthilakeMainak MookherjeeNobuyoshi MiyajimaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Geeth Manthilake Mainak Mookherjee Nobuyoshi Miyajima Insights on the deep carbon cycle from the electrical conductivity of carbon-bearing aqueous fluids
description	Abstract The dehydration and decarbonation in the subducting slab are intricately related and the knowledge of the physical properties of the resulting C–H–O fluid is crucial to interpret the petrological, geochemical, and geophysical processes associated with subduction zones. In this study, we investigate the C–H–O fluid released during the progressive devolatilization of carbonate-bearing serpentine-polymorph chrysotile, with in situ electrical conductivity measurements at high pressures and temperatures. The C–H–O fluid produced by carbonated chrysotile exhibits high electrical conductivity compared to carbon-free aqueous fluids and can be an excellent indicator of the migration of carbon in subduction zones. The crystallization of diamond and graphite indicates that the oxidized C–H–O fluids are responsible for the recycling of carbon in the wedge mantle. The carbonate and chrysotile bearing assemblages stabilize dolomite during the devolatilization process. This unique dolomite forming mechanism in chrysotile in subduction slabs may facilitate the transport of carbon into the deep mantle.
format	article
author	Geeth Manthilake Mainak Mookherjee Nobuyoshi Miyajima
author_facet	Geeth Manthilake Mainak Mookherjee Nobuyoshi Miyajima
author_sort	Geeth Manthilake
title	Insights on the deep carbon cycle from the electrical conductivity of carbon-bearing aqueous fluids
title_short	Insights on the deep carbon cycle from the electrical conductivity of carbon-bearing aqueous fluids
title_full	Insights on the deep carbon cycle from the electrical conductivity of carbon-bearing aqueous fluids
title_fullStr	Insights on the deep carbon cycle from the electrical conductivity of carbon-bearing aqueous fluids
title_full_unstemmed	Insights on the deep carbon cycle from the electrical conductivity of carbon-bearing aqueous fluids
title_sort	insights on the deep carbon cycle from the electrical conductivity of carbon-bearing aqueous fluids
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d0327876c88542b6bee55e79876cc8ca
work_keys_str_mv	AT geethmanthilake insightsonthedeepcarboncyclefromtheelectricalconductivityofcarbonbearingaqueousfluids AT mainakmookherjee insightsonthedeepcarboncyclefromtheelectricalconductivityofcarbonbearingaqueousfluids AT nobuyoshimiyajima insightsonthedeepcarboncyclefromtheelectricalconductivityofcarbonbearingaqueousfluids
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Insights on the deep carbon cycle from the electrical conductivity of carbon-bearing aqueous fluids

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