Tracking slab surface temperatures with electrical conductivity of glaucophane

Abstract Slab surface temperature is one of the key parameters that incur first-order changes in subduction dynamics. However, the current thermal models are based on empirical thermal parameters and do not accurately capture the complex pressure–temperature paths of the subducting slab, prompting s...

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Autores principales:	Geeth Manthilake, Ye Peng, Kenneth T. Koga, Mainak Mookherjee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/87f980eea9234b868cc278e031b04d30
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spelling	oai:doaj.org-article:87f980eea9234b868cc278e031b04d302021-12-02T17:19:15ZTracking slab surface temperatures with electrical conductivity of glaucophane10.1038/s41598-021-97317-02045-2322https://doaj.org/article/87f980eea9234b868cc278e031b04d302021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97317-0https://doaj.org/toc/2045-2322Abstract Slab surface temperature is one of the key parameters that incur first-order changes in subduction dynamics. However, the current thermal models are based on empirical thermal parameters and do not accurately capture the complex pressure–temperature paths of the subducting slab, prompting significant uncertainties on slab temperature estimations. In this study, we investigate whether the dehydration-melting of glaucophane can be used to benchmark the temperature in the slab. We observe that dehydration and melting of glaucophane occur at relatively low temperatures compared to the principal hydrous phases in the slab and produce highly conductive Na-rich melt. The electrical properties of glaucophane and its dehydration products are notably different from the hydrous minerals and silicate melts. Hence, we conclude that the thermodynamic instability of glaucophane in the slab provides a unique petrological criterion for tracking temperature in the present-day subduction systems through magnetotelluric profiles.Geeth ManthilakeYe PengKenneth T. KogaMainak MookherjeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Geeth Manthilake Ye Peng Kenneth T. Koga Mainak Mookherjee Tracking slab surface temperatures with electrical conductivity of glaucophane
description	Abstract Slab surface temperature is one of the key parameters that incur first-order changes in subduction dynamics. However, the current thermal models are based on empirical thermal parameters and do not accurately capture the complex pressure–temperature paths of the subducting slab, prompting significant uncertainties on slab temperature estimations. In this study, we investigate whether the dehydration-melting of glaucophane can be used to benchmark the temperature in the slab. We observe that dehydration and melting of glaucophane occur at relatively low temperatures compared to the principal hydrous phases in the slab and produce highly conductive Na-rich melt. The electrical properties of glaucophane and its dehydration products are notably different from the hydrous minerals and silicate melts. Hence, we conclude that the thermodynamic instability of glaucophane in the slab provides a unique petrological criterion for tracking temperature in the present-day subduction systems through magnetotelluric profiles.
format	article
author	Geeth Manthilake Ye Peng Kenneth T. Koga Mainak Mookherjee
author_facet	Geeth Manthilake Ye Peng Kenneth T. Koga Mainak Mookherjee
author_sort	Geeth Manthilake
title	Tracking slab surface temperatures with electrical conductivity of glaucophane
title_short	Tracking slab surface temperatures with electrical conductivity of glaucophane
title_full	Tracking slab surface temperatures with electrical conductivity of glaucophane
title_fullStr	Tracking slab surface temperatures with electrical conductivity of glaucophane
title_full_unstemmed	Tracking slab surface temperatures with electrical conductivity of glaucophane
title_sort	tracking slab surface temperatures with electrical conductivity of glaucophane
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/87f980eea9234b868cc278e031b04d30
work_keys_str_mv	AT geethmanthilake trackingslabsurfacetemperatureswithelectricalconductivityofglaucophane AT yepeng trackingslabsurfacetemperatureswithelectricalconductivityofglaucophane AT kennethtkoga trackingslabsurfacetemperatureswithelectricalconductivityofglaucophane AT mainakmookherjee trackingslabsurfacetemperatureswithelectricalconductivityofglaucophane
_version_	1718381036733202432

Tracking slab surface temperatures with electrical conductivity of glaucophane

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