Application of sequential fragmentation/transport theory to deposits of 1723 and 1963-65 eruptions of Irazú volcano, Costa Rica. Negative dispersion case
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| Autor: | |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2011 |
| Descripción: | Sequential fragmentation/transport theory (SFT) was used to analyze tephra deposits of the two main recent explosive eruptions from Irazú volcano, the 1723 and 1963-65 events. The final results provide a new way to analyze fragmentation and transport processes, which fix well with the field observations made by Alvarado (1993). A new way to process fragmentation/transport revealed 4 phi ranges that can be associated to initial volcanic fragmen- tation. The SFT fragmentation coefficient method is expanded to include all 5 subpopulations, allowing to compare the 1723 and 1963-65 events. SFT interpretation of 1723 eruptions is in good agreement with the volcanological des- cription of such explosive events, whereas SFT points to a more complex 1963-65 eruption, probably due to volcanic recycling and sedimentary reworking as it is observed in the field. |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/12236 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/geologica/article/view/12236 |
| Access Level: | acceso abierto |
| Palabra clave: | sequential fragmentation transport 1723 and 1963-65 eruptive units irazú volcano costa rica volcanic explosivity index fragmentación y transporte secuencial análisis granulométricos volcán irazú |