From steep-slope volcano to flat caldera floor
Most laboratory experiments of caldera collapse have dealt with reservoir emptying below a flat-lying overburden without an overlying analogue volcanic edifice on top. The overload and the role of topography are then neglected so that the final flat floor within the caldera is directly linked to the...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2007 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/346221 |
| Acceso en línea: | http://hdl.handle.net/10261/346221 https://api.elsevier.com/content/abstract/scopus_id/34447559411 |
| Access Level: | acceso abierto |
| Palabra clave: | Volcanoes Caldera Caldera Floor Topography Caldera Formation Caldera collapse |
| Sumario: | Most laboratory experiments of caldera collapse have dealt with reservoir emptying below a flat-lying overburden without an overlying analogue volcanic edifice on top. The overload and the role of topography are then neglected so that the final flat floor within the caldera is directly linked to the initial one. In addition, caldera subsidence is commonly attributed to the collapse of the top of a magma chamber linked to eruptions delivering large amounts of volcanic products. Analogue experiments show that the deformation of a weak clay-rich core resulting from the hydrothermal alteration in a volcanic edifice can, in certain conditions, reproduce the structures of a caldera. In particular, it is a way to explain the flat floor of a caldera when resurfacing resulting from new eruptions or destructive processes seems unlikely. Copyright 2007 by the American Geophysical Union. |
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