Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body

Abstract Iron isotopes record the physical parameters, such as temperature and redox conditions, during differentiation processes on rocky bodies. Here we report the results of a correlated investigation of iron isotope compositions and silicon contents of silicon-bearing metal grains from several a...

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Autores principales:	Soumya Ray, Laurence A. J. Garvie, Vinai K. Rai, Meenakshi Wadhwa
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/17d89d39f66940788f3ec47b0093400a
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spelling	oai:doaj.org-article:17d89d39f66940788f3ec47b0093400a2021-11-21T12:24:50ZCorrelated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body10.1038/s41598-021-99160-92045-2322https://doaj.org/article/17d89d39f66940788f3ec47b0093400a2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-99160-9https://doaj.org/toc/2045-2322Abstract Iron isotopes record the physical parameters, such as temperature and redox conditions, during differentiation processes on rocky bodies. Here we report the results of a correlated investigation of iron isotope compositions and silicon contents of silicon-bearing metal grains from several aubritic meteorites. Based on their Fe isotopic and elemental Si compositions and thermal modelling, we show that these aubrite metals equilibrated with silicates at temperatures ranging from ~ 1430 to ~ 1640 K and likely sampled different depths within their asteroidal parent body. The highest temperature in this range corresponds to their equilibration at a minimum depth of up to ~ 35 km from the surface of the aubrite parent body, followed by brecciation and excavation by impacts within the first ~ 4 Myr of Solar System history.Soumya RayLaurence A. J. GarvieVinai K. RaiMeenakshi WadhwaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Soumya Ray Laurence A. J. Garvie Vinai K. Rai Meenakshi Wadhwa Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body
description	Abstract Iron isotopes record the physical parameters, such as temperature and redox conditions, during differentiation processes on rocky bodies. Here we report the results of a correlated investigation of iron isotope compositions and silicon contents of silicon-bearing metal grains from several aubritic meteorites. Based on their Fe isotopic and elemental Si compositions and thermal modelling, we show that these aubrite metals equilibrated with silicates at temperatures ranging from ~ 1430 to ~ 1640 K and likely sampled different depths within their asteroidal parent body. The highest temperature in this range corresponds to their equilibration at a minimum depth of up to ~ 35 km from the surface of the aubrite parent body, followed by brecciation and excavation by impacts within the first ~ 4 Myr of Solar System history.
format	article
author	Soumya Ray Laurence A. J. Garvie Vinai K. Rai Meenakshi Wadhwa
author_facet	Soumya Ray Laurence A. J. Garvie Vinai K. Rai Meenakshi Wadhwa
author_sort	Soumya Ray
title	Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body
title_short	Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body
title_full	Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body
title_fullStr	Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body
title_full_unstemmed	Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body
title_sort	correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/17d89d39f66940788f3ec47b0093400a
work_keys_str_mv	AT soumyaray correlatedironisotopesandsiliconcontentsinaubritemetalsrevealstructureoftheirasteroidalparentbody AT laurenceajgarvie correlatedironisotopesandsiliconcontentsinaubritemetalsrevealstructureoftheirasteroidalparentbody AT vinaikrai correlatedironisotopesandsiliconcontentsinaubritemetalsrevealstructureoftheirasteroidalparentbody AT meenakshiwadhwa correlatedironisotopesandsiliconcontentsinaubritemetalsrevealstructureoftheirasteroidalparentbody
_version_	1718418989178159104

Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body

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