3D electrical resistivity of Gran Canaria island using magnetotelluric data
<p>Gran Canaria, one of the two main islands of the Canary Archipelago off NW Africa, has been volcanically active for at least 15 million years. The island went through several volcanic cycles that varied greatly in composition and extrusive and intrusive activity. The complex orography of th...
| Autores: | , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/207181 |
| Acceso en línea: | https://hdl.handle.net/2445/207181 |
| Access Level: | acceso abierto |
| Palabra clave: | Prospecció magnetotel·lúrica Prospecció geofísica Electromagnetisme Canàries Magnetotelluric prospecting Geophysical exploration Electromagnetism Canary Islands |
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3D electrical resistivity of Gran Canaria island using magnetotelluric dataLedo Fernández, JuanjoGarcia-Merino, M.Larnier, H.Slezak, KatarzynaPiña-Varas, PerlaMarcuello Pascual, AlejandroQueralt i Capdevila, PilarPérez, N.M.Schmincke, H.-U.Sumita, M.Prospecció magnetotel·lúricaProspecció geofísicaElectromagnetismeCanàriesMagnetotelluric prospectingGeophysical explorationElectromagnetismCanary Islands<p>Gran Canaria, one of the two main islands of the Canary Archipelago off NW Africa, has been volcanically active for at least 15 million years. The island went through several volcanic cycles that varied greatly in composition and extrusive and intrusive activity. The complex orography of the island has excluded extensive land geophysical surveys on the island. A review of the available geophysical information on the island shows that it has been obtained mainly through marine and airborne geophysical surveys. A new dataset comprising 100 magnetotelluric soundings acquired on land has been used to obtain the first 3D electrical resistivity model of the island at crustal scale. The model shows high resistivity values close to the surface in the exposed Tejeda Caldera that extends at depth to the SE cutting the islands in half. Outside the inferred limits of the Tejeda Caldera the 3D model shows low resistivity values that could be explained by hydrothermal alteration at deeper levels and the presence of marine saltwater intrusion at shallower levels near the coast. The presence of unconnected vertical-like structures, with very low resistivity (<10 ohm m) could be associated to small convective cells is confirmed by the sensitivity analysis carried out in the present study. Those structures are the most likely candidates for a detailed analysis in order to determine their geothermal economic potential. A comprehensive review of existing geophysical data and models of Gran Canaria island and their comparison with the new 3D electrical resistivity model is presented.</p>Elsevier2024202420212024info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion130 p.application/pdfhttps://hdl.handle.net/2445/207181Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.geothermics.2020.101945Geothermics, 2021, vol. 89https://doi.org/10.1016/j.geothermics.2020.101945cc-by-nc-nd (c) Elsevier, 2021info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2071812026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
3D electrical resistivity of Gran Canaria island using magnetotelluric data |
| title |
3D electrical resistivity of Gran Canaria island using magnetotelluric data |
| spellingShingle |
3D electrical resistivity of Gran Canaria island using magnetotelluric data Ledo Fernández, Juanjo Prospecció magnetotel·lúrica Prospecció geofísica Electromagnetisme Canàries Magnetotelluric prospecting Geophysical exploration Electromagnetism Canary Islands |
| title_short |
3D electrical resistivity of Gran Canaria island using magnetotelluric data |
| title_full |
3D electrical resistivity of Gran Canaria island using magnetotelluric data |
| title_fullStr |
3D electrical resistivity of Gran Canaria island using magnetotelluric data |
| title_full_unstemmed |
3D electrical resistivity of Gran Canaria island using magnetotelluric data |
| title_sort |
3D electrical resistivity of Gran Canaria island using magnetotelluric data |
| dc.creator.none.fl_str_mv |
Ledo Fernández, Juanjo Garcia-Merino, M. Larnier, H. Slezak, Katarzyna Piña-Varas, Perla Marcuello Pascual, Alejandro Queralt i Capdevila, Pilar Pérez, N.M. Schmincke, H.-U. Sumita, M. |
| author |
Ledo Fernández, Juanjo |
| author_facet |
Ledo Fernández, Juanjo Garcia-Merino, M. Larnier, H. Slezak, Katarzyna Piña-Varas, Perla Marcuello Pascual, Alejandro Queralt i Capdevila, Pilar Pérez, N.M. Schmincke, H.-U. Sumita, M. |
| author_role |
author |
| author2 |
Garcia-Merino, M. Larnier, H. Slezak, Katarzyna Piña-Varas, Perla Marcuello Pascual, Alejandro Queralt i Capdevila, Pilar Pérez, N.M. Schmincke, H.-U. Sumita, M. |
| author2_role |
author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Prospecció magnetotel·lúrica Prospecció geofísica Electromagnetisme Canàries Magnetotelluric prospecting Geophysical exploration Electromagnetism Canary Islands |
| topic |
Prospecció magnetotel·lúrica Prospecció geofísica Electromagnetisme Canàries Magnetotelluric prospecting Geophysical exploration Electromagnetism Canary Islands |
| description |
<p>Gran Canaria, one of the two main islands of the Canary Archipelago off NW Africa, has been volcanically active for at least 15 million years. The island went through several volcanic cycles that varied greatly in composition and extrusive and intrusive activity. The complex orography of the island has excluded extensive land geophysical surveys on the island. A review of the available geophysical information on the island shows that it has been obtained mainly through marine and airborne geophysical surveys. A new dataset comprising 100 magnetotelluric soundings acquired on land has been used to obtain the first 3D electrical resistivity model of the island at crustal scale. The model shows high resistivity values close to the surface in the exposed Tejeda Caldera that extends at depth to the SE cutting the islands in half. Outside the inferred limits of the Tejeda Caldera the 3D model shows low resistivity values that could be explained by hydrothermal alteration at deeper levels and the presence of marine saltwater intrusion at shallower levels near the coast. The presence of unconnected vertical-like structures, with very low resistivity (<10 ohm m) could be associated to small convective cells is confirmed by the sensitivity analysis carried out in the present study. Those structures are the most likely candidates for a detailed analysis in order to determine their geothermal economic potential. A comprehensive review of existing geophysical data and models of Gran Canaria island and their comparison with the new 3D electrical resistivity model is presented.</p> |
| publishDate |
2021 |
| dc.date.none.fl_str_mv |
2021 2024 2024 2024 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion |
| format |
article |
| status_str |
acceptedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/207181 |
| url |
https://hdl.handle.net/2445/207181 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Versió postprint del document publicat a: https://doi.org/10.1016/j.geothermics.2020.101945 Geothermics, 2021, vol. 89 https://doi.org/10.1016/j.geothermics.2020.101945 |
| dc.rights.none.fl_str_mv |
cc-by-nc-nd (c) Elsevier, 2021 info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
cc-by-nc-nd (c) Elsevier, 2021 |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
130 p. application/pdf |
| dc.publisher.none.fl_str_mv |
Elsevier |
| publisher.none.fl_str_mv |
Elsevier |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) reponame:Recercat. Dipósit de la Recerca de Catalunya instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| instname_str |
Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| reponame_str |
Recercat. Dipósit de la Recerca de Catalunya |
| collection |
Recercat. Dipósit de la Recerca de Catalunya |
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15,81155 |