Mantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): A review and future directions
9 pages, 2 figures, supplementary material https://www.frontiersin.org/articles/10.3389/feart.2023.1126274/full#supplementary-material
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| Language: | English |
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Frontiers Media
2023-04
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| Subjects: | Macaronesia region, Mantle structure and dynamics, Seismic imaging, Ocean island volcanism, Cape Verde islands, Canary and Madeira islands, Azores islands, |
| Online Access: | http://hdl.handle.net/10261/329421 |
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dig-icm-es-10261-3294212023-06-22T06:30:20Z Mantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): A review and future directions Civiero, Chiara Carvalho, Joana F. Silveira, Graça Agencia Estatal de Investigación (España) Fundação para a Ciência e a Tecnologia (Portugal) European Commission Macaronesia region Mantle structure and dynamics Seismic imaging Ocean island volcanism Cape Verde islands Canary and Madeira islands Azores islands 9 pages, 2 figures, supplementary material https://www.frontiersin.org/articles/10.3389/feart.2023.1126274/full#supplementary-material Ocean island volcanism provides a unique window into the nature of mantle composition, dynamics and evolution. The four Macaronesian archipelagos–Cape Verde, the Canaries, Madeira and the Azores–are the main magmatic systems of the Central-East Atlantic Ocean with volcanic activity that in some islands poses significant risk for the population. The recent development of regional seismic networks in these settings has provided an important step forward in mapping the underlying mantle. However, difficulties in resolving the small-scale structure with geophysical techniques persist leading to discrepancies in the interpretation of the mechanisms responsible for volcanism. Here we review results from a number of studies on the seismic mantle structure beneath the Macaronesian archipelagos including seismic tomography, receiver functions, precursors and shear-wave splitting. Several regional models show low-velocity features in the asthenosphere below the islands, a relatively thinned transition zone and complex anisotropic patterns and attribute the volcanism to mantle plumes. This inference is supported by whole-mantle tomography models, which find broad low-velocity anomalies in the lower mantle below the Central-East Atlantic. Other models call for alternative mechanisms associated with shallower mantle upwellings and purely plate tectonism. Thus, there is still no generally accepted mechanism that explains volcanism in the Macaronesia region. Future research requires improvements in the resolving power of seismic techniques to better illuminate the velocity structure at a much higher resolution than the currently achieved and ultimately define the mechanisms controlling the ocean island volcanism This work acknowledges the grant CEX2019-000928-S funded by AEI 10.13039/501100011033. This study was also supported by the Portuguese Fundação para a Ciência e Tecnologia (FCT), I.P./MCTES through national funds (PIDDAC)—UIDB/50019/2020. JC acknowledges the financial support of FCT project PTDC/CTAGEF/6674/2020. This work is a contribution to projects SIGHT (Ref. PTDC/CTA-GEF/30264/ 2017, RESTLESS (PTDC/CTA-GEF/6674/2020) and GEMMA (PTDC/CTA-GEO/2083/2021). GS is grateful for support from European Research Council (ERC) UPFLOW consolidator grant under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 10100160) Peer reviewed 2023-06-22T06:30:20Z 2023-06-22T06:30:20Z 2023-04 artículo Frontiers in Earth Science 11: 1126274 (2023) CEX2019-000928-S http://hdl.handle.net/10261/329421 10.3389/feart.2023.1126274 2296-6463 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/H2020/10100160 Publisher's version https://doi.org/10.3389/feart.2023.1126274 Sí open Frontiers Media |
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Macaronesia region Mantle structure and dynamics Seismic imaging Ocean island volcanism Cape Verde islands Canary and Madeira islands Azores islands Macaronesia region Mantle structure and dynamics Seismic imaging Ocean island volcanism Cape Verde islands Canary and Madeira islands Azores islands |
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Macaronesia region Mantle structure and dynamics Seismic imaging Ocean island volcanism Cape Verde islands Canary and Madeira islands Azores islands Macaronesia region Mantle structure and dynamics Seismic imaging Ocean island volcanism Cape Verde islands Canary and Madeira islands Azores islands Civiero, Chiara Carvalho, Joana F. Silveira, Graça Mantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): A review and future directions |
| description |
9 pages, 2 figures, supplementary material https://www.frontiersin.org/articles/10.3389/feart.2023.1126274/full#supplementary-material |
| author2 |
Agencia Estatal de Investigación (España) |
| author_facet |
Agencia Estatal de Investigación (España) Civiero, Chiara Carvalho, Joana F. Silveira, Graça |
| format |
artículo |
| topic_facet |
Macaronesia region Mantle structure and dynamics Seismic imaging Ocean island volcanism Cape Verde islands Canary and Madeira islands Azores islands |
| author |
Civiero, Chiara Carvalho, Joana F. Silveira, Graça |
| author_sort |
Civiero, Chiara |
| title |
Mantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): A review and future directions |
| title_short |
Mantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): A review and future directions |
| title_full |
Mantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): A review and future directions |
| title_fullStr |
Mantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): A review and future directions |
| title_full_unstemmed |
Mantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): A review and future directions |
| title_sort |
mantle structure beneath the macaronesian volcanic islands (cape verde, canaries, madeira and azores): a review and future directions |
| publisher |
Frontiers Media |
| publishDate |
2023-04 |
| url |
http://hdl.handle.net/10261/329421 |
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