Modelling emplacement of magmatism on the Iberia microplate during the Late Cretaceous

Detalhes bibliográficos
Autor(a) principal: Araújo, Bruno Miguel Duarte de
Data de Publicação: 2023
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10451/62615
Resumo: Tese de mestrado, Geologia Estrutural, 2023, Universidade de Lisboa, Faculdade de Ciências
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spelling Modelling emplacement of magmatism on the Iberia microplate during the Late CretaceousMagmatismo Tardi-CretácicoMargem Oeste IbéricaReconstruções PaleogeográficasTectónica de PlacasGPlatesTeses de mestrado - 2023Departamento de GeologiaTese de mestrado, Geologia Estrutural, 2023, Universidade de Lisboa, Faculdade de CiênciasFor over a century, the investigation of Late Cretaceous alkaline magmatism in the Western Iberian Margin (WIM) has focused on individual massifs, notably the Monchique massif, revealing unique rock types like Foyaite and Monchiquites (Blum, 1861; Hunter & Rosenbusch, 1890; Rock, 1982). Despite these studies, integrating these occurrences into a comprehensive geodynamic and mantle source framework has remained challenging. Existing analyses often treated them as isolated entities, relying on age dating and geochemical profiles (Grange et al., 2008, 2010; Martins et al., 2010; Mata et al., 2015; Miranda et al., 2009; Neres et al., 2012, 2018). To establish correlations among these discrete magmatic events, a paleogeographic reconstruction model was executed via GPlates software. This tool enabled the exploration of tectonic plate positions over time, coupled with underlying mantle dynamics, seeking explanations for the non-linear distribution and varied timing of magmatism in the WIM. Three primary hypotheses were evaluated: a static or mobile Hot Spot model (Courtillot et al., 2003; Elder, 1976; Koppers, 2011; Morgan, 1971, 1972), the Superplume magmatism hypothesis (Civiero et al., 2021; Courtillot et al., 2003; Long et al., 2020), and Edge-Driven Convection (King, 2007; King & Anderson, 1998; King & Ritsema, 2000; Matton & Jébrak, 2009; Missenard & Cadoux, 2012). Results indicate that a persistent and robust Super Plume better explains the distinct magmatic instances in the Western Iberian Margin than the Hot Spot theory. Edge-Driven Convection is deemed improbable due to a lack of conditions for initiation. Motion paths were analysed to validate or refute these hypotheses, including alignments like Tore-Sintra-Sines-Monchique, Tore-Madeira, and Monchique-Gorringe-Madeira. However, these paths were adjusted to better reflect regional geodynamics. Notably, specific motion paths, such as the Lisbon Volcanic Complex, hint at the potential interconnection of all WIM intrusions, with overlapping patterns suggesting the magmatic plumbing in locations and time frames matching the intrusion of these formations. Moreover, the study suggests a potential link between the Madeira Archipelago and other seamounts like Ampère, Seine, and Unicorn, such as seen in the Ampère motion path. This research demonstrates the complex interplay of geological and geodynamic processes shaping the magmatic history of the Western Iberian Margin, shedding light on the intricate relationships between magmatic occurrences and tectonic processes.Duarte, João Daniel Casal, 1981-Pereira, Ricardo N.Repositório da Universidade de LisboaAraújo, Bruno Miguel Duarte de2024-02-14T12:23:06Z202320232023-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10451/62615enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-19T01:19:03Zoai:repositorio.ul.pt:10451/62615Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:38:57.840242Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Modelling emplacement of magmatism on the Iberia microplate during the Late Cretaceous
title Modelling emplacement of magmatism on the Iberia microplate during the Late Cretaceous
spellingShingle Modelling emplacement of magmatism on the Iberia microplate during the Late Cretaceous
Araújo, Bruno Miguel Duarte de
Magmatismo Tardi-Cretácico
Margem Oeste Ibérica
Reconstruções Paleogeográficas
Tectónica de Placas
GPlates
Teses de mestrado - 2023
Departamento de Geologia
title_short Modelling emplacement of magmatism on the Iberia microplate during the Late Cretaceous
title_full Modelling emplacement of magmatism on the Iberia microplate during the Late Cretaceous
title_fullStr Modelling emplacement of magmatism on the Iberia microplate during the Late Cretaceous
title_full_unstemmed Modelling emplacement of magmatism on the Iberia microplate during the Late Cretaceous
title_sort Modelling emplacement of magmatism on the Iberia microplate during the Late Cretaceous
author Araújo, Bruno Miguel Duarte de
author_facet Araújo, Bruno Miguel Duarte de
author_role author
dc.contributor.none.fl_str_mv Duarte, João Daniel Casal, 1981-
Pereira, Ricardo N.
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Araújo, Bruno Miguel Duarte de
dc.subject.por.fl_str_mv Magmatismo Tardi-Cretácico
Margem Oeste Ibérica
Reconstruções Paleogeográficas
Tectónica de Placas
GPlates
Teses de mestrado - 2023
Departamento de Geologia
topic Magmatismo Tardi-Cretácico
Margem Oeste Ibérica
Reconstruções Paleogeográficas
Tectónica de Placas
GPlates
Teses de mestrado - 2023
Departamento de Geologia
description Tese de mestrado, Geologia Estrutural, 2023, Universidade de Lisboa, Faculdade de Ciências
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
2023-01-01T00:00:00Z
2024-02-14T12:23:06Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10451/62615
url http://hdl.handle.net/10451/62615
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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