Li enrichment in peridotites and chromitites tracks mantle-crust interaction

The ultramafic massifs of the Serranía de Ronda in southern Spain are the Earth's largest exposures of subcontinental lithospheric mantle (SCLM) peridotites (∼450 km2). These ultramafic massifs experienced asthenosphere melt percolation during their crustal emplacement. Mixing of these mafic me...

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Autores: González Pérez, Igor, González Jiménez , José María, Dare, Sarah A.S., Schettino, Erwin, Piña García, Rubén, Marchesi, Claudio, Yesares Ortiz, María Dolores, 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:20.500.14352/109275
Acceso en línea:https://hdl.handle.net/20.500.14352/109275
Access Level:acceso abierto
Palabra clave:552.3/.4
550.42
Ronda peridotites
Lithium
Chromitites
Mantle-crust interaction
Petrología
Mineralogía (Geología)
2506.13 Petrología Ignea y Metamórfica
2506.11 Mineralogía
2503 Geoquímica
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oai_identifier_str oai:docta.ucm.es:20.500.14352/109275
network_acronym_str ES
network_name_str España
repository_id_str
spelling Li enrichment in peridotites and chromitites tracks mantle-crust interactionGonzález Pérez, IgorGonzález Jiménez , José MaríaDare, Sarah A.S.Schettino, ErwinPiña García, RubénMarchesi, ClaudioYesares Ortiz, María DoloresGervilla, Fernando552.3/.4550.42Ronda peridotitesLithiumChromititesMantle-crust interactionPetrologíaMineralogía (Geología)2506.13 Petrología Ignea y Metamórfica2506.11 Mineralogía2503 GeoquímicaThe ultramafic massifs of the Serranía de Ronda in southern Spain are the Earth's largest exposures of subcontinental lithospheric mantle (SCLM) peridotites (∼450 km2). These ultramafic massifs experienced asthenosphere melt percolation during their crustal emplacement. Mixing of these mafic melts with anatectic melts and fluids led to the formation of a world's unique Ni-arsenide-rich chromitite ores (hereafter Crsingle bondNi ores) associated with orthopyroxenite and/or cordieritite (i.e., > 90 % volume of cordierite) hosted within the peridotites. This study uses laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to investigate the Li in rock-forming minerals of peridotite and Crsingle bondNi ores to evaluate the role of Li as crustal tracer. Clinopyroxene crystallized from asthenospheric melts exhibits high Li contents (up to 8.5 ppm), exceeding the average values of the upper mantle (∼ 0.7 ppm), whereas orthopyroxene, olivine, and Cr-spinel from peridotite are mostly Li-depleted. In contrast, all rock-forming minerals of Crsingle bondNi ores have abnormally high Li contents, displaying an overall Li enrichment trend toward the external parts of ultramafic massifs, on the way to the crustal rocks. This trend is evident in Cr-spinel from the Crsingle bondNi ores, which display 6.9–7.9 ppm Li in the deepest portions of the massif (Arroyo de la Cala Crsingle bondNi ore) up to 1.4–8.5 ppm in the shallowest part (La Gallega Crsingle bondNi ore), as well as in orthopyroxenes that have 31.3–44.7 ppm Li in Arroyo de la Cala, and 45.1–51.4 ppm Li in La Gallega. Cordierite is present only in the Crsingle bondNi ores situated in the external part of the ultramafic massifs, exhibiting 113.15–160.82 ppm Li in the Barranco de las Acedías Crsingle bondNi ore and 36.5–60.5 ppm Li in La Gallega Crsingle bondNi ore. Similarly to Li, LREE, fluid-mobile elements (K, Rb, Ba), and Sr in orthopyroxenes from the Crsingle bondNi ores display enrichment from the inner to the outer parts of the ultramafic massif. These geochemical variations suggest that Li enrichment in Crsingle bondNi ores and host peridotites was a twofold process: (1) asthenospheric melt percolation slightly increased Li abundances in the SCLM peridotites by modal and cryptic metasomatism involving clinopyroxene; (2) additional infiltration of Li-bearing crustally-derived fluids during the intracrustal emplacement of the mantle section boosted the Li contents of minerals in the Crsingle bondNi ores. Our results highlight that Li may effectively track the interaction of the SCLM with crustal components.ElsevierUniversidad Complutense de Madrid20242024-12-0120242024-12-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/109275reponame: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:20.500.14352/1092752026-06-02T12:44:21Z
dc.title.none.fl_str_mv Li enrichment in peridotites and chromitites tracks mantle-crust interaction
title Li enrichment in peridotites and chromitites tracks mantle-crust interaction
spellingShingle Li enrichment in peridotites and chromitites tracks mantle-crust interaction
González Pérez, Igor
552.3/.4
550.42
Ronda peridotites
Lithium
Chromitites
Mantle-crust interaction
Petrología
Mineralogía (Geología)
2506.13 Petrología Ignea y Metamórfica
2506.11 Mineralogía
2503 Geoquímica
title_short Li enrichment in peridotites and chromitites tracks mantle-crust interaction
title_full Li enrichment in peridotites and chromitites tracks mantle-crust interaction
title_fullStr Li enrichment in peridotites and chromitites tracks mantle-crust interaction
title_full_unstemmed Li enrichment in peridotites and chromitites tracks mantle-crust interaction
title_sort Li enrichment in peridotites and chromitites tracks mantle-crust interaction
dc.creator.none.fl_str_mv González Pérez, Igor
González Jiménez , José María
Dare, Sarah A.S.
Schettino, Erwin
Piña García, Rubén
Marchesi, Claudio
Yesares Ortiz, María Dolores
Gervilla, Fernando
author González Pérez, Igor
author_facet González Pérez, Igor
González Jiménez , José María
Dare, Sarah A.S.
Schettino, Erwin
Piña García, Rubén
Marchesi, Claudio
Yesares Ortiz, María Dolores
Gervilla, Fernando
author_role author
author2 González Jiménez , José María
Dare, Sarah A.S.
Schettino, Erwin
Piña García, Rubén
Marchesi, Claudio
Yesares Ortiz, María Dolores
Gervilla, Fernando
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 552.3/.4
550.42
Ronda peridotites
Lithium
Chromitites
Mantle-crust interaction
Petrología
Mineralogía (Geología)
2506.13 Petrología Ignea y Metamórfica
2506.11 Mineralogía
2503 Geoquímica
topic 552.3/.4
550.42
Ronda peridotites
Lithium
Chromitites
Mantle-crust interaction
Petrología
Mineralogía (Geología)
2506.13 Petrología Ignea y Metamórfica
2506.11 Mineralogía
2503 Geoquímica
description The ultramafic massifs of the Serranía de Ronda in southern Spain are the Earth's largest exposures of subcontinental lithospheric mantle (SCLM) peridotites (∼450 km2). These ultramafic massifs experienced asthenosphere melt percolation during their crustal emplacement. Mixing of these mafic melts with anatectic melts and fluids led to the formation of a world's unique Ni-arsenide-rich chromitite ores (hereafter Crsingle bondNi ores) associated with orthopyroxenite and/or cordieritite (i.e., > 90 % volume of cordierite) hosted within the peridotites. This study uses laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to investigate the Li in rock-forming minerals of peridotite and Crsingle bondNi ores to evaluate the role of Li as crustal tracer. Clinopyroxene crystallized from asthenospheric melts exhibits high Li contents (up to 8.5 ppm), exceeding the average values of the upper mantle (∼ 0.7 ppm), whereas orthopyroxene, olivine, and Cr-spinel from peridotite are mostly Li-depleted. In contrast, all rock-forming minerals of Crsingle bondNi ores have abnormally high Li contents, displaying an overall Li enrichment trend toward the external parts of ultramafic massifs, on the way to the crustal rocks. This trend is evident in Cr-spinel from the Crsingle bondNi ores, which display 6.9–7.9 ppm Li in the deepest portions of the massif (Arroyo de la Cala Crsingle bondNi ore) up to 1.4–8.5 ppm in the shallowest part (La Gallega Crsingle bondNi ore), as well as in orthopyroxenes that have 31.3–44.7 ppm Li in Arroyo de la Cala, and 45.1–51.4 ppm Li in La Gallega. Cordierite is present only in the Crsingle bondNi ores situated in the external part of the ultramafic massifs, exhibiting 113.15–160.82 ppm Li in the Barranco de las Acedías Crsingle bondNi ore and 36.5–60.5 ppm Li in La Gallega Crsingle bondNi ore. Similarly to Li, LREE, fluid-mobile elements (K, Rb, Ba), and Sr in orthopyroxenes from the Crsingle bondNi ores display enrichment from the inner to the outer parts of the ultramafic massif. These geochemical variations suggest that Li enrichment in Crsingle bondNi ores and host peridotites was a twofold process: (1) asthenospheric melt percolation slightly increased Li abundances in the SCLM peridotites by modal and cryptic metasomatism involving clinopyroxene; (2) additional infiltration of Li-bearing crustally-derived fluids during the intracrustal emplacement of the mantle section boosted the Li contents of minerals in the Crsingle bondNi ores. Our results highlight that Li may effectively track the interaction of the SCLM with crustal components.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024-12-01
2024
2024-12-01
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/20.500.14352/109275
url https://hdl.handle.net/20.500.14352/109275
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 Elsevier
publisher.none.fl_str_mv Elsevier
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 15,81155

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