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Subduction-related oxidation of the sublithospheric mantle evidenced by ferropericlase and magnesiowüstite diamond inclusions

Ferropericlase (Mg,Fe)O is the second most abundant mineral in Earth’s lower mantle and a common inclusion found in subcratonic diamonds. Pyrolitic mantle has Mg# (100 × Mg/(Mg+Fe)) ~89. However, ferropericlase inclusions in diamonds show a broad range of Mg# between 12 and 93. Here we use Synchrotr...

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Autores principales: Kiseeva, Ekaterina S., Korolev, Nester, Koemets, Iuliia, Zedgenizov, Dmitry A., Unitt, Richard, McCammon, Catherine, Aslandukova, Alena, Khandarkhaeva, Saiana, Fedotenko, Timofey, Glazyrin, Konstantin, Bessas, Dimitrios, Aprilis, Georgios, Chumakov, Alexandr I., Kagi, Hiroyuki, Dubrovinsky, Leonid
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9726884/
https://www.ncbi.nlm.nih.gov/pubmed/36473837
http://dx.doi.org/10.1038/s41467-022-35110-x
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author Kiseeva, Ekaterina S.
Korolev, Nester
Koemets, Iuliia
Zedgenizov, Dmitry A.
Unitt, Richard
McCammon, Catherine
Aslandukova, Alena
Khandarkhaeva, Saiana
Fedotenko, Timofey
Glazyrin, Konstantin
Bessas, Dimitrios
Aprilis, Georgios
Chumakov, Alexandr I.
Kagi, Hiroyuki
Dubrovinsky, Leonid
author_facet Kiseeva, Ekaterina S.
Korolev, Nester
Koemets, Iuliia
Zedgenizov, Dmitry A.
Unitt, Richard
McCammon, Catherine
Aslandukova, Alena
Khandarkhaeva, Saiana
Fedotenko, Timofey
Glazyrin, Konstantin
Bessas, Dimitrios
Aprilis, Georgios
Chumakov, Alexandr I.
Kagi, Hiroyuki
Dubrovinsky, Leonid
author_sort Kiseeva, Ekaterina S.
collection PubMed
description Ferropericlase (Mg,Fe)O is the second most abundant mineral in Earth’s lower mantle and a common inclusion found in subcratonic diamonds. Pyrolitic mantle has Mg# (100 × Mg/(Mg+Fe)) ~89. However, ferropericlase inclusions in diamonds show a broad range of Mg# between 12 and 93. Here we use Synchrotron Mössbauer Source (SMS) spectroscopy and single-crystal X-ray diffraction to determine the iron oxidation state and structure of two magnesiowüstite and three ferropericlase inclusions in diamonds from São Luiz, Brazil. Inclusion Mg#s vary between 16.1 and 84.5. Ferropericlase inclusions contain no ferric iron within the detection limit of SMS, while both magnesiowüstite inclusions show the presence of monocrystalline magnesioferrite ((Mg,Fe)Fe(3+)(2)O(4)) with an estimated 47–53 wt% Fe(2)O(3). We argue that the wide range of Fe concentrations observed in (Mg,Fe)O inclusions in diamonds and the appearance of magnesioferrite result from oxidation of ferropericlase triggered by the introduction of subducted material into sublithospheric mantle.
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spelling pubmed-97268842022-12-08 Subduction-related oxidation of the sublithospheric mantle evidenced by ferropericlase and magnesiowüstite diamond inclusions Kiseeva, Ekaterina S. Korolev, Nester Koemets, Iuliia Zedgenizov, Dmitry A. Unitt, Richard McCammon, Catherine Aslandukova, Alena Khandarkhaeva, Saiana Fedotenko, Timofey Glazyrin, Konstantin Bessas, Dimitrios Aprilis, Georgios Chumakov, Alexandr I. Kagi, Hiroyuki Dubrovinsky, Leonid Nat Commun Article Ferropericlase (Mg,Fe)O is the second most abundant mineral in Earth’s lower mantle and a common inclusion found in subcratonic diamonds. Pyrolitic mantle has Mg# (100 × Mg/(Mg+Fe)) ~89. However, ferropericlase inclusions in diamonds show a broad range of Mg# between 12 and 93. Here we use Synchrotron Mössbauer Source (SMS) spectroscopy and single-crystal X-ray diffraction to determine the iron oxidation state and structure of two magnesiowüstite and three ferropericlase inclusions in diamonds from São Luiz, Brazil. Inclusion Mg#s vary between 16.1 and 84.5. Ferropericlase inclusions contain no ferric iron within the detection limit of SMS, while both magnesiowüstite inclusions show the presence of monocrystalline magnesioferrite ((Mg,Fe)Fe(3+)(2)O(4)) with an estimated 47–53 wt% Fe(2)O(3). We argue that the wide range of Fe concentrations observed in (Mg,Fe)O inclusions in diamonds and the appearance of magnesioferrite result from oxidation of ferropericlase triggered by the introduction of subducted material into sublithospheric mantle. Nature Publishing Group UK 2022-12-06 /pmc/articles/PMC9726884/ /pubmed/36473837 http://dx.doi.org/10.1038/s41467-022-35110-x Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Kiseeva, Ekaterina S.
Korolev, Nester
Koemets, Iuliia
Zedgenizov, Dmitry A.
Unitt, Richard
McCammon, Catherine
Aslandukova, Alena
Khandarkhaeva, Saiana
Fedotenko, Timofey
Glazyrin, Konstantin
Bessas, Dimitrios
Aprilis, Georgios
Chumakov, Alexandr I.
Kagi, Hiroyuki
Dubrovinsky, Leonid
Subduction-related oxidation of the sublithospheric mantle evidenced by ferropericlase and magnesiowüstite diamond inclusions
title Subduction-related oxidation of the sublithospheric mantle evidenced by ferropericlase and magnesiowüstite diamond inclusions
title_full Subduction-related oxidation of the sublithospheric mantle evidenced by ferropericlase and magnesiowüstite diamond inclusions
title_fullStr Subduction-related oxidation of the sublithospheric mantle evidenced by ferropericlase and magnesiowüstite diamond inclusions
title_full_unstemmed Subduction-related oxidation of the sublithospheric mantle evidenced by ferropericlase and magnesiowüstite diamond inclusions
title_short Subduction-related oxidation of the sublithospheric mantle evidenced by ferropericlase and magnesiowüstite diamond inclusions
title_sort subduction-related oxidation of the sublithospheric mantle evidenced by ferropericlase and magnesiowüstite diamond inclusions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9726884/
https://www.ncbi.nlm.nih.gov/pubmed/36473837
http://dx.doi.org/10.1038/s41467-022-35110-x
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