Evidence for mantle heterogeneities in the westernmost Mediterranean from a statistical approach to volcanic petrology

The geological evolution of the westernmost Mediterranean region is characterised by widespread volcanic activity, with subduction (orogenic) or intraplate (anorogenic) geochemical imprints. Major, trace elements and isotopic ratios of 283 orogenic and 310 anorogenic volcanic samples from the wester...

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Autores: Melchiorre, Massimiliano, Vergés Masip, Jaume, Fernández Ortiga, Manel, Coltorti, Massimo, Torné, Montserrat, Casciello, Emilio
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/142533
Acceso en línea:http://hdl.handle.net/10261/142533
Access Level:acceso abierto
Palabra clave:Factor analysis
Geochemical database
Major elements
Trace elements
Isotopic ratios
Geodynamic evolution
Orogenic volcanism
Anorogenic volcanism
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spelling Evidence for mantle heterogeneities in the westernmost Mediterranean from a statistical approach to volcanic petrologyMelchiorre, MassimilianoVergés Masip, JaumeFernández Ortiga, ManelColtorti, MassimoTorné, MontserratCasciello, EmilioFactor analysisGeochemical databaseMajor elementsTrace elementsIsotopic ratiosGeodynamic evolutionOrogenic volcanismAnorogenic volcanismThe geological evolution of the westernmost Mediterranean region is characterised by widespread volcanic activity, with subduction (orogenic) or intraplate (anorogenic) geochemical imprints. Major, trace elements and isotopic ratios of 283 orogenic and 310 anorogenic volcanic samples from the western and central Mediterranean areas were merged in a single database that was processed using a statistical approach. Factor analysis, performed using the Principal Component Analysis (PCA) method, reduced the original 36 geochemical parameters that were expressed as oxides, elements or isotopic ratios to seven factors that account for ~. 84% of the variance. Combining these factors in binary diagrams clearly separates the anorogenic and orogenic fields. Anorogenic samples usually fall into a narrow compositional range, while orogenic rocks are characterised by greater variability and by alignment along different trends. These different trends are a result of large heterogeneities of the lithospheric mantle beneath the Mediterranean area because of extensive recycling of geochemically different lithologies, at least since Palaeozoic times. The results support the requirement for different mantle reservoirs in the origin of the Mediterranean volcanism. We find that the double subduction polarity model, recently proposed for the westernmost Mediterranean area, is compatible with the volcanic petrology of the last 30 My. © 2016 Elsevier B.V.The present work has been supported by the research projects WEME (CSIC-201330E111) and MITE (CGL2014-59516-P).Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201720172016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/142533reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.lithos.2016.11.018Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1425332026-05-22T06:33:51Z
dc.title.none.fl_str_mv Evidence for mantle heterogeneities in the westernmost Mediterranean from a statistical approach to volcanic petrology
title Evidence for mantle heterogeneities in the westernmost Mediterranean from a statistical approach to volcanic petrology
spellingShingle Evidence for mantle heterogeneities in the westernmost Mediterranean from a statistical approach to volcanic petrology
Melchiorre, Massimiliano
Factor analysis
Geochemical database
Major elements
Trace elements
Isotopic ratios
Geodynamic evolution
Orogenic volcanism
Anorogenic volcanism
title_short Evidence for mantle heterogeneities in the westernmost Mediterranean from a statistical approach to volcanic petrology
title_full Evidence for mantle heterogeneities in the westernmost Mediterranean from a statistical approach to volcanic petrology
title_fullStr Evidence for mantle heterogeneities in the westernmost Mediterranean from a statistical approach to volcanic petrology
title_full_unstemmed Evidence for mantle heterogeneities in the westernmost Mediterranean from a statistical approach to volcanic petrology
title_sort Evidence for mantle heterogeneities in the westernmost Mediterranean from a statistical approach to volcanic petrology
dc.creator.none.fl_str_mv Melchiorre, Massimiliano
Vergés Masip, Jaume
Fernández Ortiga, Manel
Coltorti, Massimo
Torné, Montserrat
Casciello, Emilio
author Melchiorre, Massimiliano
author_facet Melchiorre, Massimiliano
Vergés Masip, Jaume
Fernández Ortiga, Manel
Coltorti, Massimo
Torné, Montserrat
Casciello, Emilio
author_role author
author2 Vergés Masip, Jaume
Fernández Ortiga, Manel
Coltorti, Massimo
Torné, Montserrat
Casciello, Emilio
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Factor analysis
Geochemical database
Major elements
Trace elements
Isotopic ratios
Geodynamic evolution
Orogenic volcanism
Anorogenic volcanism
topic Factor analysis
Geochemical database
Major elements
Trace elements
Isotopic ratios
Geodynamic evolution
Orogenic volcanism
Anorogenic volcanism
description The geological evolution of the westernmost Mediterranean region is characterised by widespread volcanic activity, with subduction (orogenic) or intraplate (anorogenic) geochemical imprints. Major, trace elements and isotopic ratios of 283 orogenic and 310 anorogenic volcanic samples from the western and central Mediterranean areas were merged in a single database that was processed using a statistical approach. Factor analysis, performed using the Principal Component Analysis (PCA) method, reduced the original 36 geochemical parameters that were expressed as oxides, elements or isotopic ratios to seven factors that account for ~. 84% of the variance. Combining these factors in binary diagrams clearly separates the anorogenic and orogenic fields. Anorogenic samples usually fall into a narrow compositional range, while orogenic rocks are characterised by greater variability and by alignment along different trends. These different trends are a result of large heterogeneities of the lithospheric mantle beneath the Mediterranean area because of extensive recycling of geochemically different lithologies, at least since Palaeozoic times. The results support the requirement for different mantle reservoirs in the origin of the Mediterranean volcanism. We find that the double subduction polarity model, recently proposed for the westernmost Mediterranean area, is compatible with the volcanic petrology of the last 30 My. © 2016 Elsevier B.V.
publishDate 2016
dc.date.none.fl_str_mv 2016
2017
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/142533
url http://hdl.handle.net/10261/142533
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.lithos.2016.11.018
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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