Petrogenesis and age of the Peltetec Ophiolitic belt and the Tampanchi ultramafic-mafic complex, Cordillera Real (Ecuador): Geodynamic implications for the evolution of the Andean active margin

[EN] The aim of this PhD Thesis is to address the geodynamic evolution of the active Andean continental margin during the Mesozoic, centered in the Northern Andean branch of the chain, by means of a petrological approach. Initially, two mafic - ultramafic complexes of nominally Cretaceous age were s...

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Autor: Villares Jibaja, Fabián Marcelo
Tipo de recurso: tesis doctoral
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/267139
Acceso en línea:http://hdl.handle.net/10261/267139
Access Level:acceso abierto
Palabra clave:Geodinámica
Petrología
Ofiolitas
Ecuador
Andes
Tampanchi
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spelling Petrogenesis and age of the Peltetec Ophiolitic belt and the Tampanchi ultramafic-mafic complex, Cordillera Real (Ecuador): Geodynamic implications for the evolution of the Andean active marginVillares Jibaja, Fabián MarceloGeodinámicaPetrologíaOfiolitasEcuadorAndesTampanchi[EN] The aim of this PhD Thesis is to address the geodynamic evolution of the active Andean continental margin during the Mesozoic, centered in the Northern Andean branch of the chain, by means of a petrological approach. Initially, two mafic - ultramafic complexes of nominally Cretaceous age were selected. One related to an oceanic environment (oceanic lithosphere) obducted onto the continental margin termed the Peltetec ophiolitic belt (Peltetec Unit) and a continental volcanic arc intrusion termed the Tampamchi ultramafic – mafic complex, both located in the Cordillera Real of Ecuador. However, the Triassic U-Pb zircon age obtained in this work allow discarding the previous published Ar-Ar plagioclase (albite) Cretaceous age of the Peltetec ophiolite, which must be considered an overprinting age. This unexpected result prevents considering the potential geodynamic relationship of the selected complexes.[ES] El objetivo de esta tesis doctoral es abordar la evolución geodinámica del margen continental occidental de los Andes del Norte durante el Mesozoico mediante una aproximación petrológica. Para esto se seleccionaron dos complejos máficos-ultramáficos de edad nominalmente Cretácica, uno relacionado a un ambiente oceánico correspondiente a litósfera oceánica obductada sobre el margen continental, llamado Cinturón ofiolítico Peltetec (Unidad Peltetec), y el otro una intrusión de arco continental llamado Complejo ultramáfico-máfico Tampanchi, ambos localizados en la Cordillera Real de Ecuador. Sin embargo, la edad U-Pb en circón Triásica obtenida en este estudio descarta la edad Cretácica (Ar-Ar en plagioclasa/albita) previamente interpretada como edad de formación de la ofiolita Peltetec, la cual debe considerarse como una edad sobreimpuesta. Este resultado impide considerar la potencial relación geodinámica entre los complejos seleccionados.Universidad de GranadaGarcia Casco, AntonioBlanco-Quintero, Idael FranciscoConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2022202220212022info:eu-repo/semantics/doctoralThesishttp://purl.org/coar/resource_type/c_db06Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/267139reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2671392026-05-22T06:33:51Z
dc.title.none.fl_str_mv Petrogenesis and age of the Peltetec Ophiolitic belt and the Tampanchi ultramafic-mafic complex, Cordillera Real (Ecuador): Geodynamic implications for the evolution of the Andean active margin
title Petrogenesis and age of the Peltetec Ophiolitic belt and the Tampanchi ultramafic-mafic complex, Cordillera Real (Ecuador): Geodynamic implications for the evolution of the Andean active margin
spellingShingle Petrogenesis and age of the Peltetec Ophiolitic belt and the Tampanchi ultramafic-mafic complex, Cordillera Real (Ecuador): Geodynamic implications for the evolution of the Andean active margin
Villares Jibaja, Fabián Marcelo
Geodinámica
Petrología
Ofiolitas
Ecuador
Andes
Tampanchi
title_short Petrogenesis and age of the Peltetec Ophiolitic belt and the Tampanchi ultramafic-mafic complex, Cordillera Real (Ecuador): Geodynamic implications for the evolution of the Andean active margin
title_full Petrogenesis and age of the Peltetec Ophiolitic belt and the Tampanchi ultramafic-mafic complex, Cordillera Real (Ecuador): Geodynamic implications for the evolution of the Andean active margin
title_fullStr Petrogenesis and age of the Peltetec Ophiolitic belt and the Tampanchi ultramafic-mafic complex, Cordillera Real (Ecuador): Geodynamic implications for the evolution of the Andean active margin
title_full_unstemmed Petrogenesis and age of the Peltetec Ophiolitic belt and the Tampanchi ultramafic-mafic complex, Cordillera Real (Ecuador): Geodynamic implications for the evolution of the Andean active margin
title_sort Petrogenesis and age of the Peltetec Ophiolitic belt and the Tampanchi ultramafic-mafic complex, Cordillera Real (Ecuador): Geodynamic implications for the evolution of the Andean active margin
dc.creator.none.fl_str_mv Villares Jibaja, Fabián Marcelo
author Villares Jibaja, Fabián Marcelo
author_facet Villares Jibaja, Fabián Marcelo
author_role author
dc.contributor.none.fl_str_mv Garcia Casco, Antonio
Blanco-Quintero, Idael Francisco
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Geodinámica
Petrología
Ofiolitas
Ecuador
Andes
Tampanchi
topic Geodinámica
Petrología
Ofiolitas
Ecuador
Andes
Tampanchi
description [EN] The aim of this PhD Thesis is to address the geodynamic evolution of the active Andean continental margin during the Mesozoic, centered in the Northern Andean branch of the chain, by means of a petrological approach. Initially, two mafic - ultramafic complexes of nominally Cretaceous age were selected. One related to an oceanic environment (oceanic lithosphere) obducted onto the continental margin termed the Peltetec ophiolitic belt (Peltetec Unit) and a continental volcanic arc intrusion termed the Tampamchi ultramafic – mafic complex, both located in the Cordillera Real of Ecuador. However, the Triassic U-Pb zircon age obtained in this work allow discarding the previous published Ar-Ar plagioclase (albite) Cretaceous age of the Peltetec ophiolite, which must be considered an overprinting age. This unexpected result prevents considering the potential geodynamic relationship of the selected complexes.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/doctoralThesis
http://purl.org/coar/resource_type/c_db06
Publisher's version
info:eu-repo/semantics/publishedVersion
format doctoralThesis
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/267139
url http://hdl.handle.net/10261/267139
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Universidad de Granada
publisher.none.fl_str_mv Universidad de Granada
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
_version_ 1869410482974097408
score 15,812455

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