Petrology, structural fabrics and CA ID-TIMS U-Pb zircon geochronology of the granitoid suites from the Namibe region in southwestern Angola: a record of the Eburnean tectonomagmatic evolution in the Southwestern Congo Shield
Dentro del monográfico "PLANAGEO, the National Geology Plan of Angola".
| Autores: | , , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2025 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/400349 |
| Acesso em linha: | http://hdl.handle.net/10261/400349 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Escudo del Congo Suroccidental Orogenia Eburneana Series granitoides Angola Southwestern Congo Shield Eburnean orogeny Granitoid suites |
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oai:digital.csic.es:10261/400349 |
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España |
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| dc.title.none.fl_str_mv |
Petrology, structural fabrics and CA ID-TIMS U-Pb zircon geochronology of the granitoid suites from the Namibe region in southwestern Angola: a record of the Eburnean tectonomagmatic evolution in the Southwestern Congo Shield Petrología, fábrica estructural y geocronología U-Pb CA ID-TIMS en circón de las series de granitoides de la región de Namibe in the suroeste de Angola: un registro de la evolución tectonomagmática Eburneana en el Escudo del Congo Suroccidental |
| title |
Petrology, structural fabrics and CA ID-TIMS U-Pb zircon geochronology of the granitoid suites from the Namibe region in southwestern Angola: a record of the Eburnean tectonomagmatic evolution in the Southwestern Congo Shield |
| spellingShingle |
Petrology, structural fabrics and CA ID-TIMS U-Pb zircon geochronology of the granitoid suites from the Namibe region in southwestern Angola: a record of the Eburnean tectonomagmatic evolution in the Southwestern Congo Shield Escuder Viruete, Javier Escudo del Congo Suroccidental Orogenia Eburneana Series granitoides Angola Southwestern Congo Shield Eburnean orogeny Granitoid suites |
| title_short |
Petrology, structural fabrics and CA ID-TIMS U-Pb zircon geochronology of the granitoid suites from the Namibe region in southwestern Angola: a record of the Eburnean tectonomagmatic evolution in the Southwestern Congo Shield |
| title_full |
Petrology, structural fabrics and CA ID-TIMS U-Pb zircon geochronology of the granitoid suites from the Namibe region in southwestern Angola: a record of the Eburnean tectonomagmatic evolution in the Southwestern Congo Shield |
| title_fullStr |
Petrology, structural fabrics and CA ID-TIMS U-Pb zircon geochronology of the granitoid suites from the Namibe region in southwestern Angola: a record of the Eburnean tectonomagmatic evolution in the Southwestern Congo Shield |
| title_full_unstemmed |
Petrology, structural fabrics and CA ID-TIMS U-Pb zircon geochronology of the granitoid suites from the Namibe region in southwestern Angola: a record of the Eburnean tectonomagmatic evolution in the Southwestern Congo Shield |
| title_sort |
Petrology, structural fabrics and CA ID-TIMS U-Pb zircon geochronology of the granitoid suites from the Namibe region in southwestern Angola: a record of the Eburnean tectonomagmatic evolution in the Southwestern Congo Shield |
| dc.creator.none.fl_str_mv |
Escuder Viruete, Javier Valverde Vaquero, Pablo María Beranoaguirre de Miguel, Aratz Montero, Pilar Plastov, José Manuel |
| author |
Escuder Viruete, Javier |
| author_facet |
Escuder Viruete, Javier Valverde Vaquero, Pablo María Beranoaguirre de Miguel, Aratz Montero, Pilar Plastov, José Manuel |
| author_role |
author |
| author2 |
Valverde Vaquero, Pablo María Beranoaguirre de Miguel, Aratz Montero, Pilar Plastov, José Manuel |
| author2_role |
author author author author |
| dc.contributor.none.fl_str_mv |
Escuder Viruete, Javier [0000-0002-3108-9082] Valverde Vaquero, Pablo María [0000-0002-2184-0848] Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Escudo del Congo Suroccidental Orogenia Eburneana Series granitoides Angola Southwestern Congo Shield Eburnean orogeny Granitoid suites |
| topic |
Escudo del Congo Suroccidental Orogenia Eburneana Series granitoides Angola Southwestern Congo Shield Eburnean orogeny Granitoid suites |
| description |
Dentro del monográfico "PLANAGEO, the National Geology Plan of Angola". |
| publishDate |
2025 |
| dc.date.none.fl_str_mv |
2025 2025 2025 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/400349 |
| url |
http://hdl.handle.net/10261/400349 |
| dc.language.none.fl_str_mv |
Español |
| language_invalid_str_mv |
Español |
| dc.relation.none.fl_str_mv |
https://doi.org/10.21701/bolgeomin/136.1/008 Sí |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
| dc.publisher.none.fl_str_mv |
Consejo Superior de Investigaciones Científicas (España) |
| publisher.none.fl_str_mv |
Consejo Superior de Investigaciones Científicas (España) |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Consejo Superior de Investigaciones Científicas (CSIC) |
| reponame_str |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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1869414969539297280 |
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Petrology, structural fabrics and CA ID-TIMS U-Pb zircon geochronology of the granitoid suites from the Namibe region in southwestern Angola: a record of the Eburnean tectonomagmatic evolution in the Southwestern Congo ShieldPetrología, fábrica estructural y geocronología U-Pb CA ID-TIMS en circón de las series de granitoides de la región de Namibe in the suroeste de Angola: un registro de la evolución tectonomagmática Eburneana en el Escudo del Congo SuroccidentalEscuder Viruete, JavierValverde Vaquero, Pablo MaríaBeranoaguirre de Miguel, AratzMontero, PilarPlastov, José ManuelEscudo del Congo SuroccidentalOrogenia EburneanaSeries granitoidesAngolaSouthwestern Congo ShieldEburnean orogenyGranitoid suitesDentro del monográfico "PLANAGEO, the National Geology Plan of Angola".[EN] During the Orosirian to Statherian transition, a great textural and compositional variety of granitoids intruded the Namibe region of the Southwestern Congo Shield. This magmatic activity was contemporaneous with a regional Eburnean tectonometamorphic event dated 1.83-1.81 Ga ago, characterized by polyphase ductile deformation, crustal thickening, high-T/low-P regional metamorphism, partial melting and the formation of anatectic granites. Petrological and structural analyses, mainly at the outcrop scale, define three distinct granitoid suites. The planar-linear magmatic fabrics observed in the leucogranite sills of the G1 suite are aligned with the intrusive contact and the S2-L2 deformational fabrics in the enclosing gneisses. Consequently, the G1 suite granites are inferred to be syn- to late-kinematic with respect to the D2 deformation event. Granitoids of the gabbroic-dioritic and tonalitic-granodioritic associations within the G2 suite intruded the cores of D3 antiforms, forming elongated massifs parallel to the hinge zones. These intrusions exhibit a subvertical magmatic foliation and subhorizontal lineation, aligned with the S3-L3 fabrics of the host rocks, indicating emplacement of the G2 suite from syn- to late-D3. G3 suite granites form elliptical massifs that cut the D3 macrostructure and display a concentrically zoned textural organization. The orientation of the planar magmatic fabric and enclaves is subparallel to the S4 in the host rocks, suggesting the syn- to post-D4 intrusion of the G3 suite. U-Pb CA ID-TIMS zircon geochronology reveals that these suites intruded within a short time spam of ca. 10 Ma with distinctive pulses at 1808 Ma (G1-G2 suites) and 1803-1801 Ma (G2-G3 suites).[ES] Durante la transición Orosírico a Estatérico intruyeron una amplia variedad textural y composicional de granitoides en la región de Namibe del Escudo del Congo Suroccidental. Este magmatismo fue contemporáneo con un evento tectonometamórfico regional Eburneano de edad 1.83-1.81 Ga, caracterizado por una deformación dúctil polifásica, engrosamiento cortical, metamorfismo regional de alta-T/baja-P y fusión parcial. Los datos petrológicos y estructurales permiten identificar tres series granitoides. Las fábricas magmáticas presentes en sills de leucogranitos de la serie G1 están alineadas con el contacto intrusivo y las fábricas S2-L2 en los gneises encajantes, interpretándose como sin- y tardi-cinemáticos respecto a la deformación D2. Los granitoides de las asociaciones gabroico-diorítica y tonalítico-granodiorítica de la serie G2 intruyeron el núcleo de las antiformas D3, formando macizos elongados paralelamente a las charnelas. Estas intrusiones exhiben una foliación magmática subvertical y una lineación subhorizontal, alineada con las fábricas S3-L3 del encajante, lo que sugiere un emplazamiento de la serie G2 desde sin- a tardi-D3. Los granitos de la serie G3 forman macizos de contornos elípticos que cortan a la macroestructura de D3 y muestran una organización textural zonada concéntricamente. La orientación de las fábricas magmáticas planares y de los enclaves es subparalela a la S4 en el encajante, indicando la intrusión de la serie G3 desde sin- hasta post-D4. La geocronología U-Pb por CA ID-TIMS en circón muestra que estas suites intruyeron en un corto intervalo de tiempo de 10 Ma, con distintos pulsos a 1808 Ma (suites G1 y G2) y 1803-1801 Ma (suites G2-G3).Peer reviewedConsejo Superior de Investigaciones Científicas (España)Escuder Viruete, Javier [0000-0002-3108-9082]Valverde Vaquero, Pablo María [0000-0002-2184-0848]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/400349reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Españolhttps://doi.org/10.21701/bolgeomin/136.1/008Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4003492026-05-22T06:33:51Z |
| score |
15.198674 |