Processes, time scales and unrest of monogenetic volcanism
[eng] Seismic, deformation, and gas activity (unrest) typically precedes volcanic eruptions. Successful volcanic event forecasting depends on the quality of the surveillance network for detecting any changes in volcano behaviour. To interpret the geochemical and geophysical precursors correctly it i...
| Autor: | |
|---|---|
| Formato: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | España |
| Recursos: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/68682 |
| Acesso em linha: | https://hdl.handle.net/2445/68682 http://tdx.cat/handle/10803/334689 |
| Access Level: | acceso abierto |
| Palavra-chave: | Vulcanisme Magmatisme Tenerife (Canàries) Erupcions volcàniques Vulcanism Magmatism Tenerife (Canary Islands) Volcanic eruptions |
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Processes, time scales and unrest of monogenetic volcanismAlbert Mínguez, HelenaVulcanismeMagmatismeTenerife (Canàries)Erupcions volcàniquesVulcanismMagmatismTenerife (Canary Islands)Volcanic eruptions[eng] Seismic, deformation, and gas activity (unrest) typically precedes volcanic eruptions. Successful volcanic event forecasting depends on the quality of the surveillance network for detecting any changes in volcano behaviour. To interpret the geochemical and geophysical precursors correctly it is important to understand the volcanic processes that occur prior and during volcanic eruptions. Detailed knowledge of the volcano internal structure, the rheology of the magmas, the time scales of the processes occurring at depth and the characteristics of past unrest episodes, must be combined with an adequate monitoring network to improve the volcanic hazard forecast. However, these aspects have received little attention in monogenetic volcanoes. The aim of my PhD Thesis is to improve our understanding on monogenetic volcanism, its causes and dynamics, and to help anticipating the volcanic activity. I have focused on three main aspects of this problem. The first one is the calculation of the rheological properties of magmas during mixing. The second aspect I have addressed are the processes and time scales that lead to monogenetic eruptions with the aim to better interpret volcanic unrest and improve eruption forecasts. Finally, I have investigated the seismic unrest periods of historical monogenetic eruptions from a compilation of historical accounts worldwide. The results provide a conceptual framework for better anticipating monogenetic eruptions and should lead to improved strategies for mitigation of their associated hazards and risks.[spa] Las erupciones volcánicas están generalmente precedidas por la actividad sísmica, la deformación y la desgasificación (unrest). El éxito en la predicción del evento volcánico depende de la calidad de la red de vigilancia para detectar cualquier cambio en el comportamiento del volcán. Para interpretar los precursores geoquímicos y geofísicos correctamente es importante entender los procesos volcánicos que ocurren antes y durante las erupciones volcánicas. El conocimiento en detalle de la estructura interna del volcán, la reología de los magmas, las escalas de tiempo de los procesos que ocurren en profundidad y las características de los episodios pasados de unrest, debe combinarse con una red de vigilancia adecuada para mejorar el pronóstico de los eventos volcánicos. Sin embargo, estos aspectos han recibido poca atención en los volcanes monogenéticos. El objetivo de mi tesis doctoral es mejorar nuestra comprensión sobre el vulcanismo monogenético, sus causas y su dinámica, con el objetivo de mejorar la posibilidad de anticiparse a la actividad volcánica. Me he centrado en tres aspectos principales de este problema. El primero es el cálculo de las propiedades reológicas de los magmas durante los eventos de mezcla. El segundo aspecto es el estudio de los procesos, junto con sus escalas temporales, que llevan a erupciones monogenéticas con el fin de interpretar mejor la actividad volcánica y mejorar los pronósticos de una erupción. Por último, he investigado los períodos de unrest sísmico de erupciones monogenéticas históricas en todo el mundo mediante una compilación de documentos históricos. Los resultados proporcionan un marco conceptual que permite mejorar la predicción de erupciones monogenéticas y deberían conducir a mejores estrategias para mitigar sus peligros y riesgos asociados.Universitat de BarcelonaMartí i Molist, Joan, 1957-Costa, Fidel2015info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/68682http://tdx.cat/handle/10803/334689Tesis Doctorals - Departament - Geodinàmica i Geofísicareponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaIngléscc by (c) Albert, 2015http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/686822026-05-27T06:46:51Z |
| dc.title.none.fl_str_mv |
Processes, time scales and unrest of monogenetic volcanism |
| title |
Processes, time scales and unrest of monogenetic volcanism |
| spellingShingle |
Processes, time scales and unrest of monogenetic volcanism Albert Mínguez, Helena Vulcanisme Magmatisme Tenerife (Canàries) Erupcions volcàniques Vulcanism Magmatism Tenerife (Canary Islands) Volcanic eruptions |
| title_short |
Processes, time scales and unrest of monogenetic volcanism |
| title_full |
Processes, time scales and unrest of monogenetic volcanism |
| title_fullStr |
Processes, time scales and unrest of monogenetic volcanism |
| title_full_unstemmed |
Processes, time scales and unrest of monogenetic volcanism |
| title_sort |
Processes, time scales and unrest of monogenetic volcanism |
| dc.creator.none.fl_str_mv |
Albert Mínguez, Helena |
| author |
Albert Mínguez, Helena |
| author_facet |
Albert Mínguez, Helena |
| author_role |
author |
| dc.contributor.none.fl_str_mv |
Martí i Molist, Joan, 1957- Costa, Fidel |
| dc.subject.none.fl_str_mv |
Vulcanisme Magmatisme Tenerife (Canàries) Erupcions volcàniques Vulcanism Magmatism Tenerife (Canary Islands) Volcanic eruptions |
| topic |
Vulcanisme Magmatisme Tenerife (Canàries) Erupcions volcàniques Vulcanism Magmatism Tenerife (Canary Islands) Volcanic eruptions |
| description |
[eng] Seismic, deformation, and gas activity (unrest) typically precedes volcanic eruptions. Successful volcanic event forecasting depends on the quality of the surveillance network for detecting any changes in volcano behaviour. To interpret the geochemical and geophysical precursors correctly it is important to understand the volcanic processes that occur prior and during volcanic eruptions. Detailed knowledge of the volcano internal structure, the rheology of the magmas, the time scales of the processes occurring at depth and the characteristics of past unrest episodes, must be combined with an adequate monitoring network to improve the volcanic hazard forecast. However, these aspects have received little attention in monogenetic volcanoes. The aim of my PhD Thesis is to improve our understanding on monogenetic volcanism, its causes and dynamics, and to help anticipating the volcanic activity. I have focused on three main aspects of this problem. The first one is the calculation of the rheological properties of magmas during mixing. The second aspect I have addressed are the processes and time scales that lead to monogenetic eruptions with the aim to better interpret volcanic unrest and improve eruption forecasts. Finally, I have investigated the seismic unrest periods of historical monogenetic eruptions from a compilation of historical accounts worldwide. The results provide a conceptual framework for better anticipating monogenetic eruptions and should lead to improved strategies for mitigation of their associated hazards and risks. |
| publishDate |
2015 |
| dc.date.none.fl_str_mv |
2015 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/doctoralThesis info:eu-repo/semantics/publishedVersion |
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doctoralThesis |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/68682 http://tdx.cat/handle/10803/334689 |
| url |
https://hdl.handle.net/2445/68682 http://tdx.cat/handle/10803/334689 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.rights.none.fl_str_mv |
cc by (c) Albert, 2015 http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
cc by (c) Albert, 2015 http://creativecommons.org/licenses/by/3.0/es/ |
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openAccess |
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application/pdf |
| dc.publisher.none.fl_str_mv |
Universitat de Barcelona |
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Universitat de Barcelona |
| dc.source.none.fl_str_mv |
Tesis Doctorals - Departament - Geodinàmica i Geofísica reponame:Dipòsit Digital de la UB instname:Universidad de Barcelona |
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Universidad de Barcelona |
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Dipòsit Digital de la UB |
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Dipòsit Digital de la UB |
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1869416858235437056 |
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15,300719 |