Trayectoria metamórfica P-T relacionada con subducción en eclogitas del Complejo de Basamento de Samaná, Cordillera Septentrional, República Dominicana

Lenses of eclogites from the Punta Balandra unit of the Samaná basement complex, Cordillera Septentrional, Dominican Republic, preserve information of the early metamorphic and tectonic history of subduction in the Greater Antilles island-arc system and their collision with the North America plate....

Descripción completa

Detalles Bibliográficos
Autores: Escuder Viruete, J., Pérez Estaún, A.
Tipo de recurso: artículo
Fecha de publicación:2004
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:español
OAI Identifier:oai:docta.ucm.es:20.500.14352/52511
Acceso en línea:https://hdl.handle.net/20.500.14352/52511
Access Level:acceso abierto
Palabra clave:552
Blueschist
Eclogite
High-P metamorphism
Caribbean Plate
Equilibrium phase diagrams
Petrología
id ES_a2214cb00453040ff79c81d83fab9ab8
oai_identifier_str oai:docta.ucm.es:20.500.14352/52511
network_acronym_str ES
network_name_str España
repository_id_str
spelling Trayectoria metamórfica P-T relacionada con subducción en eclogitas del Complejo de Basamento de Samaná, Cordillera Septentrional, República DominicanaEscuder Viruete, J.Pérez Estaún, A.552BlueschistEclogiteHigh-P metamorphismCaribbean PlateEquilibrium phase diagramsPetrologíaLenses of eclogites from the Punta Balandra unit of the Samaná basement complex, Cordillera Septentrional, Dominican Republic, preserve information of the early metamorphic and tectonic history of subduction in the Greater Antilles island-arc system and their collision with the North America plate. For this reason, these rocks were investigated for reconstruction of quantitative metamorphic P-J paths based upon interpretation of meso and microfabrics, mineral assemblages and mineral chemistry, with the help of equilibrium phase diagrams calculated for specific bulk composition in the model system CKNFMASH and isopleths for selected solution end-members. The obtained subduction-related prograde evolution went from garnet-free first and garnet-bearing next lawsonite-blueschist facies to peak eclogue facies conditions at P=22-24 kbar and 7=6 1 0-625sC. The subsequent retrograde P-T path entered the epidote-blueschist (garnet-free) facies and ended within the greenschist facies, retracing the prograde evolution at low-P (i.e. indicates cooling during the exhumation of the rocks). Thus, Samaná basement complex eclogites and hydrated equivalents formed in a intraoceanic subduction zone in which WSW/W-migrating Atlantic lithosphere was subducted beneath the Caribbean plate. Thrust stacking of different tectonic slices can provide the geological framework for exhumation and cooling due to continuous cool underplating and explains the preservation of high-pressure assemblages.Sociedad Geológica de España.Universidad Complutense de Madrid20042004-01-0120042004-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/52511reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Españolspaopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/525112026-06-02T12:44:21Z
dc.title.none.fl_str_mv Trayectoria metamórfica P-T relacionada con subducción en eclogitas del Complejo de Basamento de Samaná, Cordillera Septentrional, República Dominicana
title Trayectoria metamórfica P-T relacionada con subducción en eclogitas del Complejo de Basamento de Samaná, Cordillera Septentrional, República Dominicana
spellingShingle Trayectoria metamórfica P-T relacionada con subducción en eclogitas del Complejo de Basamento de Samaná, Cordillera Septentrional, República Dominicana
Escuder Viruete, J.
552
Blueschist
Eclogite
High-P metamorphism
Caribbean Plate
Equilibrium phase diagrams
Petrología
title_short Trayectoria metamórfica P-T relacionada con subducción en eclogitas del Complejo de Basamento de Samaná, Cordillera Septentrional, República Dominicana
title_full Trayectoria metamórfica P-T relacionada con subducción en eclogitas del Complejo de Basamento de Samaná, Cordillera Septentrional, República Dominicana
title_fullStr Trayectoria metamórfica P-T relacionada con subducción en eclogitas del Complejo de Basamento de Samaná, Cordillera Septentrional, República Dominicana
title_full_unstemmed Trayectoria metamórfica P-T relacionada con subducción en eclogitas del Complejo de Basamento de Samaná, Cordillera Septentrional, República Dominicana
title_sort Trayectoria metamórfica P-T relacionada con subducción en eclogitas del Complejo de Basamento de Samaná, Cordillera Septentrional, República Dominicana
dc.creator.none.fl_str_mv Escuder Viruete, J.
Pérez Estaún, A.
author Escuder Viruete, J.
author_facet Escuder Viruete, J.
Pérez Estaún, A.
author_role author
author2 Pérez Estaún, A.
author2_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 552
Blueschist
Eclogite
High-P metamorphism
Caribbean Plate
Equilibrium phase diagrams
Petrología
topic 552
Blueschist
Eclogite
High-P metamorphism
Caribbean Plate
Equilibrium phase diagrams
Petrología
description Lenses of eclogites from the Punta Balandra unit of the Samaná basement complex, Cordillera Septentrional, Dominican Republic, preserve information of the early metamorphic and tectonic history of subduction in the Greater Antilles island-arc system and their collision with the North America plate. For this reason, these rocks were investigated for reconstruction of quantitative metamorphic P-J paths based upon interpretation of meso and microfabrics, mineral assemblages and mineral chemistry, with the help of equilibrium phase diagrams calculated for specific bulk composition in the model system CKNFMASH and isopleths for selected solution end-members. The obtained subduction-related prograde evolution went from garnet-free first and garnet-bearing next lawsonite-blueschist facies to peak eclogue facies conditions at P=22-24 kbar and 7=6 1 0-625sC. The subsequent retrograde P-T path entered the epidote-blueschist (garnet-free) facies and ended within the greenschist facies, retracing the prograde evolution at low-P (i.e. indicates cooling during the exhumation of the rocks). Thus, Samaná basement complex eclogites and hydrated equivalents formed in a intraoceanic subduction zone in which WSW/W-migrating Atlantic lithosphere was subducted beneath the Caribbean plate. Thrust stacking of different tectonic slices can provide the geological framework for exhumation and cooling due to continuous cool underplating and explains the preservation of high-pressure assemblages.
publishDate 2004
dc.date.none.fl_str_mv 2004
2004-01-01
2004
2004-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/52511
url https://hdl.handle.net/20.500.14352/52511
dc.language.none.fl_str_mv Español
spa
language_invalid_str_mv Español
language spa
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
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
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Sociedad Geológica de España.
publisher.none.fl_str_mv Sociedad Geológica de España.
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
_version_ 1869415238096388096
score 15.300719

Similares en LA Referencia