Redox preconditioning deep cratonic lithosphere for kimberlite genesis – evidence from the central Slave Craton

Abstract We present the first oxygen fugacity (fO2) profile through the cratonic lithospheric mantle under the Panda kimberlite (Ekati Diamond Mine) in the Lac de Gras kimberlite field, central Slave Craton, northern Canada. Combining this data with new and existing data from garnet peridotite xenol...

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Autores principales:	G. M. Yaxley, A. J. Berry, A. Rosenthal, A. B. Woodland, D. Paterson
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/90da4f90624142189a71c5e3203c944c
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spelling	oai:doaj.org-article:90da4f90624142189a71c5e3203c944c2021-12-02T15:05:39ZRedox preconditioning deep cratonic lithosphere for kimberlite genesis – evidence from the central Slave Craton10.1038/s41598-017-00049-32045-2322https://doaj.org/article/90da4f90624142189a71c5e3203c944c2017-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00049-3https://doaj.org/toc/2045-2322Abstract We present the first oxygen fugacity (fO2) profile through the cratonic lithospheric mantle under the Panda kimberlite (Ekati Diamond Mine) in the Lac de Gras kimberlite field, central Slave Craton, northern Canada. Combining this data with new and existing data from garnet peridotite xenoliths from an almost coeval kimberlite (A154-N) at the nearby Diavik Diamond Mine demonstrates that the oxygen fugacity of the Slave cratonic mantle varies by several orders of magnitude as a function of depth and over short lateral distances. The lower part of the diamond-bearing Slave lithosphere (>120–130 km deep) has been oxidized by up to 4 log units in fO2, and this is clearly linked to metasomatic enrichment. Such coupled enrichment and oxidation was likely caused by infiltrating carbonate-bearing, hydrous, silicate melts in the presence of diamond, a process proposed to be critical for “pre-conditioning” deep lithospheric mantle and rendering it suitable for later generation of kimberlites and other SiO2-undersaturated magmas.G. M. YaxleyA. J. BerryA. RosenthalA. B. WoodlandD. PatersonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q G. M. Yaxley A. J. Berry A. Rosenthal A. B. Woodland D. Paterson Redox preconditioning deep cratonic lithosphere for kimberlite genesis – evidence from the central Slave Craton
description	Abstract We present the first oxygen fugacity (fO2) profile through the cratonic lithospheric mantle under the Panda kimberlite (Ekati Diamond Mine) in the Lac de Gras kimberlite field, central Slave Craton, northern Canada. Combining this data with new and existing data from garnet peridotite xenoliths from an almost coeval kimberlite (A154-N) at the nearby Diavik Diamond Mine demonstrates that the oxygen fugacity of the Slave cratonic mantle varies by several orders of magnitude as a function of depth and over short lateral distances. The lower part of the diamond-bearing Slave lithosphere (>120–130 km deep) has been oxidized by up to 4 log units in fO2, and this is clearly linked to metasomatic enrichment. Such coupled enrichment and oxidation was likely caused by infiltrating carbonate-bearing, hydrous, silicate melts in the presence of diamond, a process proposed to be critical for “pre-conditioning” deep lithospheric mantle and rendering it suitable for later generation of kimberlites and other SiO2-undersaturated magmas.
format	article
author	G. M. Yaxley A. J. Berry A. Rosenthal A. B. Woodland D. Paterson
author_facet	G. M. Yaxley A. J. Berry A. Rosenthal A. B. Woodland D. Paterson
author_sort	G. M. Yaxley
title	Redox preconditioning deep cratonic lithosphere for kimberlite genesis – evidence from the central Slave Craton
title_short	Redox preconditioning deep cratonic lithosphere for kimberlite genesis – evidence from the central Slave Craton
title_full	Redox preconditioning deep cratonic lithosphere for kimberlite genesis – evidence from the central Slave Craton
title_fullStr	Redox preconditioning deep cratonic lithosphere for kimberlite genesis – evidence from the central Slave Craton
title_full_unstemmed	Redox preconditioning deep cratonic lithosphere for kimberlite genesis – evidence from the central Slave Craton
title_sort	redox preconditioning deep cratonic lithosphere for kimberlite genesis – evidence from the central slave craton
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/90da4f90624142189a71c5e3203c944c
work_keys_str_mv	AT gmyaxley redoxpreconditioningdeepcratoniclithosphereforkimberlitegenesisevidencefromthecentralslavecraton AT ajberry redoxpreconditioningdeepcratoniclithosphereforkimberlitegenesisevidencefromthecentralslavecraton AT arosenthal redoxpreconditioningdeepcratoniclithosphereforkimberlitegenesisevidencefromthecentralslavecraton AT abwoodland redoxpreconditioningdeepcratoniclithosphereforkimberlitegenesisevidencefromthecentralslavecraton AT dpaterson redoxpreconditioningdeepcratoniclithosphereforkimberlitegenesisevidencefromthecentralslavecraton
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Redox preconditioning deep cratonic lithosphere for kimberlite genesis – evidence from the central Slave Craton

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