Gravimetric study of the shallow basaltic plumbing system of Tenerife, Canary Islands

Recent studies on intraplate volcanic islands reveal that magma ascends sub-vertically through these volcanic edifices, following well-defined zones in the lithospheric mantle and oceanic crust, and occasionally suffering lateral propagation along rift zones when it reaches very shallow depths. Visu...

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Autores: Sainz-Maza, Sergio, Martí Molist, Joan, Montesinos, Fuensanta G., Borreguero Gómez, A., Pereda de Pablo, Jorge, Vaquero Fernández, P., Calvo García-Maroto, Marta
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/194190
Acceso en línea:http://hdl.handle.net/10261/194190
Access Level:acceso abierto
Palabra clave:Tenerife
Rift system
Monogenetic volcanism
Gravity inversion
Genetic algorithm
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spelling Gravimetric study of the shallow basaltic plumbing system of Tenerife, Canary IslandsSainz-Maza, SergioMartí Molist, JoanMontesinos, Fuensanta G.Borreguero Gómez, A.Pereda de Pablo, JorgeVaquero Fernández, P.Calvo García-Maroto, MartaTenerifeRift systemMonogenetic volcanismGravity inversionGenetic algorithmRecent studies on intraplate volcanic islands reveal that magma ascends sub-vertically through these volcanic edifices, following well-defined zones in the lithospheric mantle and oceanic crust, and occasionally suffering lateral propagation along rift zones when it reaches very shallow depths. Visualizing the internal structure of the shallowest part of such magma plumbing systems is crucial to understanding magma transport and the location of basaltic volcanism in these volcanic environments. Tenerife (Canary Islands) is a very good example of an intraplate volcanic island, in which the distribution of basaltic volcanism includes well-defined rift systems, and wider monogenetic fields where cinder cones form clusters along different tectonic alignments. In order to characterize the structure of the uppermost part of the basaltic plumbing system of Tenerife, we conducted a detailed gravimetric study of the north-western, central, and southern sectors of the island. We developed a 3D density contrast model of the subsoil based on the application of a genetic algorithm for the inversion of gravity data. The results of our inverse modelling suggest that the observed gravimetric anomalies below the northwestern rift zone are shallow and aligned parallel to this structure. This is consistent with a shallow character for the rift system and a lateral migration of magma along it that comes from a deeper zone located towards the east of this rift zone. Conversely, the anomalies located in the south are also shallow but are distributed along more than one alignment and are connected to much deeper sub-vertical similar density anomalies. These results support the existence of several main channels at the north and south of the island that allow the ascent of deep basaltic magma to shallower zones of Tenerife. There, magma may be either caught by the rifts systems, being distributed laterally and occasionally erupting, or may continue its ascent to the surface using a secondary system of shallow fractures that dominates the southern part of Tenerife. The results of our inverse model also offer new insights on others aspects of the internal structure of Tenerife, such as the distribution of the basaltic shield or that of Las Cañadas caldera. © 2019 Elsevier B.V.Joan Martí was funded by the MECD ( PRX16/00056 ) grant. This work was partially supported by the Instituto Geográfico Nacional of the Spanish Ministerio de Fomento and through projects CGL2014-53044-R and CGL2015-63799-P of the Spanish Ministry of Economy and Competitiveness .Peer reviewedElsevierMinisterio de Educación, Cultura y Deporte (España)Ministerio de Fomento (España)Ministerio de Economía y Competitividad (España)Martí Molist, Joan [0000-0003-3930-8603]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201920192019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/194190reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2015-63799-Phttps://doi.org/10.1016/j.pepi.2019.106319Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1941902026-05-22T06:33:51Z
dc.title.none.fl_str_mv Gravimetric study of the shallow basaltic plumbing system of Tenerife, Canary Islands
title Gravimetric study of the shallow basaltic plumbing system of Tenerife, Canary Islands
spellingShingle Gravimetric study of the shallow basaltic plumbing system of Tenerife, Canary Islands
Sainz-Maza, Sergio
Tenerife
Rift system
Monogenetic volcanism
Gravity inversion
Genetic algorithm
title_short Gravimetric study of the shallow basaltic plumbing system of Tenerife, Canary Islands
title_full Gravimetric study of the shallow basaltic plumbing system of Tenerife, Canary Islands
title_fullStr Gravimetric study of the shallow basaltic plumbing system of Tenerife, Canary Islands
title_full_unstemmed Gravimetric study of the shallow basaltic plumbing system of Tenerife, Canary Islands
title_sort Gravimetric study of the shallow basaltic plumbing system of Tenerife, Canary Islands
dc.creator.none.fl_str_mv Sainz-Maza, Sergio
Martí Molist, Joan
Montesinos, Fuensanta G.
Borreguero Gómez, A.
Pereda de Pablo, Jorge
Vaquero Fernández, P.
Calvo García-Maroto, Marta
author Sainz-Maza, Sergio
author_facet Sainz-Maza, Sergio
Martí Molist, Joan
Montesinos, Fuensanta G.
Borreguero Gómez, A.
Pereda de Pablo, Jorge
Vaquero Fernández, P.
Calvo García-Maroto, Marta
author_role author
author2 Martí Molist, Joan
Montesinos, Fuensanta G.
Borreguero Gómez, A.
Pereda de Pablo, Jorge
Vaquero Fernández, P.
Calvo García-Maroto, Marta
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Educación, Cultura y Deporte (España)
Ministerio de Fomento (España)
Ministerio de Economía y Competitividad (España)
Martí Molist, Joan [0000-0003-3930-8603]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Tenerife
Rift system
Monogenetic volcanism
Gravity inversion
Genetic algorithm
topic Tenerife
Rift system
Monogenetic volcanism
Gravity inversion
Genetic algorithm
description Recent studies on intraplate volcanic islands reveal that magma ascends sub-vertically through these volcanic edifices, following well-defined zones in the lithospheric mantle and oceanic crust, and occasionally suffering lateral propagation along rift zones when it reaches very shallow depths. Visualizing the internal structure of the shallowest part of such magma plumbing systems is crucial to understanding magma transport and the location of basaltic volcanism in these volcanic environments. Tenerife (Canary Islands) is a very good example of an intraplate volcanic island, in which the distribution of basaltic volcanism includes well-defined rift systems, and wider monogenetic fields where cinder cones form clusters along different tectonic alignments. In order to characterize the structure of the uppermost part of the basaltic plumbing system of Tenerife, we conducted a detailed gravimetric study of the north-western, central, and southern sectors of the island. We developed a 3D density contrast model of the subsoil based on the application of a genetic algorithm for the inversion of gravity data. The results of our inverse modelling suggest that the observed gravimetric anomalies below the northwestern rift zone are shallow and aligned parallel to this structure. This is consistent with a shallow character for the rift system and a lateral migration of magma along it that comes from a deeper zone located towards the east of this rift zone. Conversely, the anomalies located in the south are also shallow but are distributed along more than one alignment and are connected to much deeper sub-vertical similar density anomalies. These results support the existence of several main channels at the north and south of the island that allow the ascent of deep basaltic magma to shallower zones of Tenerife. There, magma may be either caught by the rifts systems, being distributed laterally and occasionally erupting, or may continue its ascent to the surface using a secondary system of shallow fractures that dominates the southern part of Tenerife. The results of our inverse model also offer new insights on others aspects of the internal structure of Tenerife, such as the distribution of the basaltic shield or that of Las Cañadas caldera. © 2019 Elsevier B.V.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/194190
url http://hdl.handle.net/10261/194190
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2015-63799-P
https://doi.org/10.1016/j.pepi.2019.106319
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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
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