Micro- to nano-sized solid inclusions in magnetite record skarn reactions

Magnetite is a widespread ore mineral in skarn systems and usually hosts a wide variety of inclusions. Micro- to nano-sized solid inclusions in magnetite are unique tools to track the evolutionary processes of its host mineral and, subsequently, to constrain the timing of the mineralization event. I...

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Autores: González Pérez, Igor, González Jiménez , José María, Yesares Ortiz, María Dolores, Acosta Vigil, Antonio, Llopís, Jordi, Gervilla, Fernando
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/112176
Acceso en línea:https://hdl.handle.net/20.500.14352/112176
Access Level:acceso abierto
Palabra clave:549.731.1
Mineralogía (Geología)
2506.11 Mineralogía
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spelling Micro- to nano-sized solid inclusions in magnetite record skarn reactionsGonzález Pérez, IgorGonzález Jiménez , José MaríaYesares Ortiz, María DoloresAcosta Vigil, AntonioLlopís, JordiGervilla, Fernando549.731.1Mineralogía (Geología)2506.11 MineralogíaMagnetite is a widespread ore mineral in skarn systems and usually hosts a wide variety of inclusions. Micro- to nano-sized solid inclusions in magnetite are unique tools to track the evolutionary processes of its host mineral and, subsequently, to constrain the timing of the mineralization event. In this study, we characterize micro- to nano-sized solid inclusions in magnetite from the La Víbora magnesian skarn (Málaga, Spain) using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). TEM energy-dispersive X-ray spectrometry (EDS) analyses and compositional mapping expose two types of nano-inclusions oriented along the (111) of magnetite: type 1 includes dolomite, spinel, and Mg–Fe–Al silicate, and type 2 is made up of Mg–Fe–Al silicates enveloping the Mg-bearing amorphous silica phase. High-resolution transmission electron microscopy (HRTEM), selected-area electron diffraction (SAED), and fast Fourier transform (FFT) patterns reveal that the majority of the solid inclusions display non-oriented matrices compared to the host magnetite, precluding the possibility of sub-solidus processes. Instead, these inclusions are thought to preserve skarn mineral assemblages that were entrapped during the growth of magnetite. However, the local supersaturation of fluids trapped in the boundary layer of crystallizing magnetite is evidenced by coherent lattice orientation of precipitated and host magnetite and by the occurrence of an Mg-bearing amorphous silica phase. Our findings reveal that skarn reactions observed at field and microscopic scales are also recorded in nano-sized inclusions within magnetite. These observations underscore the significance of micro- to nano-scale solid inclusions in magnetite to decipher overprinted skarn reactions as well as constraining the timing of Fe mineralization events in skarns.Copernicus PublicationsUniversidad Complutense de Madrid20242024-10-2920242024-10-29journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/112176reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1121762026-06-02T12:44:21Z
dc.title.none.fl_str_mv Micro- to nano-sized solid inclusions in magnetite record skarn reactions
title Micro- to nano-sized solid inclusions in magnetite record skarn reactions
spellingShingle Micro- to nano-sized solid inclusions in magnetite record skarn reactions
González Pérez, Igor
549.731.1
Mineralogía (Geología)
2506.11 Mineralogía
title_short Micro- to nano-sized solid inclusions in magnetite record skarn reactions
title_full Micro- to nano-sized solid inclusions in magnetite record skarn reactions
title_fullStr Micro- to nano-sized solid inclusions in magnetite record skarn reactions
title_full_unstemmed Micro- to nano-sized solid inclusions in magnetite record skarn reactions
title_sort Micro- to nano-sized solid inclusions in magnetite record skarn reactions
dc.creator.none.fl_str_mv González Pérez, Igor
González Jiménez , José María
Yesares Ortiz, María Dolores
Acosta Vigil, Antonio
Llopís, Jordi
Gervilla, Fernando
author González Pérez, Igor
author_facet González Pérez, Igor
González Jiménez , José María
Yesares Ortiz, María Dolores
Acosta Vigil, Antonio
Llopís, Jordi
Gervilla, Fernando
author_role author
author2 González Jiménez , José María
Yesares Ortiz, María Dolores
Acosta Vigil, Antonio
Llopís, Jordi
Gervilla, Fernando
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 549.731.1
Mineralogía (Geología)
2506.11 Mineralogía
topic 549.731.1
Mineralogía (Geología)
2506.11 Mineralogía
description Magnetite is a widespread ore mineral in skarn systems and usually hosts a wide variety of inclusions. Micro- to nano-sized solid inclusions in magnetite are unique tools to track the evolutionary processes of its host mineral and, subsequently, to constrain the timing of the mineralization event. In this study, we characterize micro- to nano-sized solid inclusions in magnetite from the La Víbora magnesian skarn (Málaga, Spain) using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). TEM energy-dispersive X-ray spectrometry (EDS) analyses and compositional mapping expose two types of nano-inclusions oriented along the (111) of magnetite: type 1 includes dolomite, spinel, and Mg–Fe–Al silicate, and type 2 is made up of Mg–Fe–Al silicates enveloping the Mg-bearing amorphous silica phase. High-resolution transmission electron microscopy (HRTEM), selected-area electron diffraction (SAED), and fast Fourier transform (FFT) patterns reveal that the majority of the solid inclusions display non-oriented matrices compared to the host magnetite, precluding the possibility of sub-solidus processes. Instead, these inclusions are thought to preserve skarn mineral assemblages that were entrapped during the growth of magnetite. However, the local supersaturation of fluids trapped in the boundary layer of crystallizing magnetite is evidenced by coherent lattice orientation of precipitated and host magnetite and by the occurrence of an Mg-bearing amorphous silica phase. Our findings reveal that skarn reactions observed at field and microscopic scales are also recorded in nano-sized inclusions within magnetite. These observations underscore the significance of micro- to nano-scale solid inclusions in magnetite to decipher overprinted skarn reactions as well as constraining the timing of Fe mineralization events in skarns.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024-10-29
2024
2024-10-29
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/112176
url https://hdl.handle.net/20.500.14352/112176
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Copernicus Publications
publisher.none.fl_str_mv Copernicus Publications
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,223283

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