Caracterización por medio de ASM de los sistemas de diques de la isla de Santa María (Azores oriental, Portugal)
The analysis of the interaction between mantle plumes and the geodynamical context has produced debates about their influence in the development of insular volcanism. In the case of the Azores archipielago, the alignment of islands related to a static plume has led to models associated with the inte...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | español |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/16415 |
| Acceso en línea: | http://hdl.handle.net/10272/16415 |
| Access Level: | acceso abierto |
| Palabra clave: | AMS Azores Santa María Island Dikes Fracturation net Isla de Santa María Diques Sistema de fracturación |
| Sumario: | The analysis of the interaction between mantle plumes and the geodynamical context has produced debates about their influence in the development of insular volcanism. In the case of the Azores archipielago, the alignment of islands related to a static plume has led to models associated with the interaction of the Azores triple point. In this context, the interaction between the Azores-Gibraltar fault and the Terceira rift has been evaluated for the current volcanism distribution. The Santa María Island, the eastern most one from the Azores archipielago, is located in the intersection between both systems and presents fracturation and dike networks agreeing with the two main fracture systems. In this work diachronic dike systems are analyzed through AMS (Anisotropy of Magnetic Susceptibility) with the aim of giving information about the emplacement conditions of dikes during the fracturation stages. The obtained results allow us to identify subvertical dike injections that are compatible with a passive injection through tectonic fractures |
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