Serpentinites and serpentinites within a fossil subduction channel: La Corea mélange, eastern Cuba

A variety of metaultramafic (serpentinite) rocks in La Corea mélange, Sierra de Cristal, eastern Cuba, show differences in chemical, textural and mineralogical characteristics demonstrating a variety of protoliths. The mélange originated during the Cretaceous as part of the subduction channel associ...

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Autores: Blanco-Quintero, Idael Francisco, Proenza Fernández, Joaquín Antonio, García Casco, Antonio, Tauler i Ferré, Esperança, Galí Medina, Salvador, 1949-
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/109017
Acesso em linha:https://hdl.handle.net/2445/109017
Access Level:acceso abierto
Palavra-chave:Serpentinita
Tectònica de plaques
Cuba
Serpentinite
Plate tectonics
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spelling Serpentinites and serpentinites within a fossil subduction channel: La Corea mélange, eastern CubaBlanco-Quintero, Idael FranciscoProenza Fernández, Joaquín AntonioGarcía Casco, AntonioTauler i Ferré, EsperançaGalí Medina, Salvador, 1949-SerpentinitaTectònica de plaquesCubaSerpentinitePlate tectonicsCubaA variety of metaultramafic (serpentinite) rocks in La Corea mélange, Sierra de Cristal, eastern Cuba, show differences in chemical, textural and mineralogical characteristics demonstrating a variety of protoliths. The mélange originated during the Cretaceous as part of the subduction channel associated with the Caribbean island arc. This mélange contains high pressure blocks in a serpentinite matrix and occurs at the base of the large tabular Mayarí-Cristal ophiolite. Two principal groups of serpentinites have been identified in the mélange: a) antigorite serpentinite, mainly composed of antigorite and b) antigorite-lizardite serpentinite, composed of mixtures of antigorite and lizardite and bearing distinctive porphyroblasts of diopsidic clinopyroxene. Antigorite serpentinites are closely related to tectonic blocks of amphibolite (representing subducted MORB) and constitute deep fragments of the serpentinitic subduction channel formed during hydration of the mantle wedge. The composition of the antigorite-lizardite serpentinites and the presence of clinopyroxene porphyroblasts in this type of rock suggest that abyssal lherzolite protoliths transformed into serpentinite before and during incorporation (as tectonic blocks) in the shallow part of the subduction channel. Although the studied rocks have different origin, mineralogical compositions and textures, they display similar PGE compositions, suggesting that these elements experienced no significant redistribution during metamorphism. Both types of serpentinites were exposed together in the La Corea mélange during the Late Cretaceous, during obduction of the overriding Mayarí-Baracoa ophiolitic belt that led to exhumation of the subduction channel (mélange)(UB). (ICTJA). (IDEA). (UAB). (CSIC)2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/109017Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1344/105.000001662Geologica Acta, 2011, vol. 9, num. 2-3, p. 1-17https://doi.org/10.1344/105.000001662cc-by-sa (c) Blanco-Quintero, I et al., 2011http://creativecommons.org/licenses/by-sa/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1090172026-05-27T06:46:51Z
dc.title.none.fl_str_mv Serpentinites and serpentinites within a fossil subduction channel: La Corea mélange, eastern Cuba
title Serpentinites and serpentinites within a fossil subduction channel: La Corea mélange, eastern Cuba
spellingShingle Serpentinites and serpentinites within a fossil subduction channel: La Corea mélange, eastern Cuba
Blanco-Quintero, Idael Francisco
Serpentinita
Tectònica de plaques
Cuba
Serpentinite
Plate tectonics
Cuba
title_short Serpentinites and serpentinites within a fossil subduction channel: La Corea mélange, eastern Cuba
title_full Serpentinites and serpentinites within a fossil subduction channel: La Corea mélange, eastern Cuba
title_fullStr Serpentinites and serpentinites within a fossil subduction channel: La Corea mélange, eastern Cuba
title_full_unstemmed Serpentinites and serpentinites within a fossil subduction channel: La Corea mélange, eastern Cuba
title_sort Serpentinites and serpentinites within a fossil subduction channel: La Corea mélange, eastern Cuba
dc.creator.none.fl_str_mv Blanco-Quintero, Idael Francisco
Proenza Fernández, Joaquín Antonio
García Casco, Antonio
Tauler i Ferré, Esperança
Galí Medina, Salvador, 1949-
author Blanco-Quintero, Idael Francisco
author_facet Blanco-Quintero, Idael Francisco
Proenza Fernández, Joaquín Antonio
García Casco, Antonio
Tauler i Ferré, Esperança
Galí Medina, Salvador, 1949-
author_role author
author2 Proenza Fernández, Joaquín Antonio
García Casco, Antonio
Tauler i Ferré, Esperança
Galí Medina, Salvador, 1949-
author2_role author
author
author
author
dc.subject.none.fl_str_mv Serpentinita
Tectònica de plaques
Cuba
Serpentinite
Plate tectonics
Cuba
topic Serpentinita
Tectònica de plaques
Cuba
Serpentinite
Plate tectonics
Cuba
description A variety of metaultramafic (serpentinite) rocks in La Corea mélange, Sierra de Cristal, eastern Cuba, show differences in chemical, textural and mineralogical characteristics demonstrating a variety of protoliths. The mélange originated during the Cretaceous as part of the subduction channel associated with the Caribbean island arc. This mélange contains high pressure blocks in a serpentinite matrix and occurs at the base of the large tabular Mayarí-Cristal ophiolite. Two principal groups of serpentinites have been identified in the mélange: a) antigorite serpentinite, mainly composed of antigorite and b) antigorite-lizardite serpentinite, composed of mixtures of antigorite and lizardite and bearing distinctive porphyroblasts of diopsidic clinopyroxene. Antigorite serpentinites are closely related to tectonic blocks of amphibolite (representing subducted MORB) and constitute deep fragments of the serpentinitic subduction channel formed during hydration of the mantle wedge. The composition of the antigorite-lizardite serpentinites and the presence of clinopyroxene porphyroblasts in this type of rock suggest that abyssal lherzolite protoliths transformed into serpentinite before and during incorporation (as tectonic blocks) in the shallow part of the subduction channel. Although the studied rocks have different origin, mineralogical compositions and textures, they display similar PGE compositions, suggesting that these elements experienced no significant redistribution during metamorphism. Both types of serpentinites were exposed together in the La Corea mélange during the Late Cretaceous, during obduction of the overriding Mayarí-Baracoa ophiolitic belt that led to exhumation of the subduction channel (mélange)
publishDate 2011
dc.date.none.fl_str_mv 2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/109017
url https://hdl.handle.net/2445/109017
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1344/105.000001662
Geologica Acta, 2011, vol. 9, num. 2-3, p. 1-17
https://doi.org/10.1344/105.000001662
dc.rights.none.fl_str_mv cc-by-sa (c) Blanco-Quintero, I et al., 2011
http://creativecommons.org/licenses/by-sa/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-sa (c) Blanco-Quintero, I et al., 2011
http://creativecommons.org/licenses/by-sa/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv (UB). (ICTJA). (IDEA). (UAB). (CSIC)
publisher.none.fl_str_mv (UB). (ICTJA). (IDEA). (UAB). (CSIC)
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301629

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