Publication
Geochemical comparison of circular plutonic complexes with extrusive rocks from Sal Island (Cape Verde)
| datacite.subject.fos | Ciências Naturais::Ciências da Terra e do Ambiente | |
| dc.contributor.author | Garcia-Rodriguez, Maria | |
| dc.contributor.author | Villaseca, Carlos | |
| dc.contributor.author | Ignacio, Cristina | |
| dc.contributor.author | Orejana, David | |
| dc.contributor.author | Mata, João | |
| dc.contributor.author | Caldeira, Rita | |
| dc.date.accessioned | 2025-08-11T13:45:20Z | |
| dc.date.available | 2025-08-11T13:45:20Z | |
| dc.date.issued | 2024-07 | |
| dc.description.abstract | ABSTRACT: Sal island is located in the northeast and is the oldest of the Cape Verde archipelago, with magmatic activity starting ~25 Ma ago. It presents a series of circular plutons that could represent the subvolcanic roots of the exposed extrusive rocks. In this work we compare the geochemical characteristics of melagabbro-gabbro of circular (~16.3 Ma) intrusions in the Old Eruptive Complex, with basaltic and nephelinitic lavas of equivalent age (~15.8 and 14.2 Ma, Torres et al., 2010). This comparison allows observing a geochemical overlap between basalts and gabbros, and the similarity between trends of part of the samples in Harker-type diagrams and REE patterns. However, this compositional overlap is incomplete, with considerable differences and absence of fractionated (intermediate) lava types related to these terms of the circular complexes. This partial but incomplete overlap of the compositional fields of the plutonic and volcanic trends argues against the possibility of a direct genetic relationship between the two. | eng |
| dc.description.abstract | RESUMEN: Sal se localiza en el noreste de Cabo Verde y es la isla más antigua del archipiélago, con actividad magmática que comenzó hace 25 Ma. Presenta una serie de plutones circulares que podrían representar las raíces subvolcánicas de las rocas extrusivas expuestas. En este trabajo comparamos las características geoquímicas de melagabros-gabros de los complejos circulares (~16.3 Ma) intrusivos en el Old Eruptive Complex, con lavas basálticas y nefeliníticas de edad equivalente (~15.8 y 14.2 Ma, Torres et al., 2010). Esta comparativa permite observar un solapamiento geoquímico entre basaltos y gabros, y la similitud entre tendencias de parte de las muestras en diagramas tipo Harker y patrones de REE. Sin embargo, este solapamiento composicional es incompleto, existiendo diferencias considerables y una ausencia de lavas fraccionadas (intermedias) que se relacionen con estos términos de los complejos circulares. Esta superposición parcial pero incompleta de los campos composicionales de las rocas plutónicas y volcánicas complica la posibilidad de existencia de una relación genética directa entre ambos conjuntos magmáticos. | spa |
| dc.identifier.citation | García-Rodríguez, M., Villaseca, C., Ignacio, C., Orejana, D., Mata, J. & Caldeira, R. (2024) Geochemical comparison of circular plutonic complexes with extrusive rocks from Sal Island (Cape Verde). In: Geo-Temas, vol. 20, XI Congresso Geológico de España, Ávila, España, 2-6 July, 2024, pp. 316-319 | |
| dc.identifier.issn | 1576-5172 | |
| dc.identifier.uri | http://hdl.handle.net/10400.9/6013 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | Sociedad Geológica de España | |
| dc.relation.hasversion | https://sociedadgeologica.org/publicaciones/geotemas/geo-temas-20/ | |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | Circular complexes | |
| dc.subject | Genetic relationship | |
| dc.subject | Sal Island | |
| dc.subject | Cape Verde archipelago | |
| dc.subject | Complejos circulares | |
| dc.subject | Relaciones genéticas | |
| dc.subject | Isla de Sal | |
| dc.subject | Archipiélago de Cabo Verde | |
| dc.title | Geochemical comparison of circular plutonic complexes with extrusive rocks from Sal Island (Cape Verde) | eng |
| dc.title.alternative | Comparación geoquímica de los complejos plutónicos circulares con las rocas extrusivas de la isla de Sal (Cabo Verde) | spa |
| dc.type | conference object | |
| dspace.entity.type | Publication | |
| oaire.citation.conferenceDate | 2024-07 | |
| oaire.citation.conferencePlace | Ávila, España | |
| oaire.citation.endPage | 319 | |
| oaire.citation.startPage | 316 | |
| oaire.citation.title | Geo-Temas: XI Congresso Geológico de España | |
| oaire.citation.volume | 20 | |
| oaire.version | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |
| person.familyName | Mata | |
| person.familyName | Caldeira | |
| person.givenName | João | |
| person.givenName | Rita | |
| person.identifier | I-3352-2012 | |
| person.identifier.ciencia-id | 4312-8A60-15E3 | |
| person.identifier.ciencia-id | F810-1AEB-E73D | |
| person.identifier.orcid | 0000-0001-5769-7708 | |
| person.identifier.orcid | 0000-0002-4379-1311 | |
| person.identifier.scopus-author-id | 7102806167 | |
| relation.isAuthorOfPublication | a7da0053-32e2-4701-9715-10e73b583207 | |
| relation.isAuthorOfPublication | aa38046a-ff7d-4c32-b8e7-05b2eaee5dbf | |
| relation.isAuthorOfPublication.latestForDiscovery | a7da0053-32e2-4701-9715-10e73b583207 |