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Implicaciones de la transferencia de magma entre múltiples depósitos en el ciclo de erupción
Derek Elsworth1, Glen Mattioli, Joshua Taron
1College of Earth and Mineral Sciences, Penn State University, University Park, PA 16802, USA. elsworth@psu.edu
Science (New York, N.Y.)
|October 11, 2008
Resumen
Las erupciones volcánicas son episódicas. La transferencia de magma dentro del volcán Soufrière Hills muestra un suministro profundo continuo alimentando un reservorio de la corteza media, que de forma episódica alimenta las erupciones superficiales.
Área de la Ciencia:
- Volcanología Volcanología.
- La geofísica es la geofísica.
Sus antecedentes:
- Las erupciones volcánicas son episódicas, a pesar del suministro continuo de magma.
- Comprender la dinámica de transferencia de magma es crucial para el pronóstico de erupciones.
Objetivo del estudio:
- Para obtener imágenes geodésicas de la transferencia de magma dentro del volcán Soufrière Hills.
- Para investigar los mecanismos que causan erupciones volcánicas episódicas.
Principales métodos:
- Análisis del eflujo de magma y historias de deformación de la superficie.
- Imágenes geodésicas de la tubería profunda de la corteza terrestre.
Principales resultados:
- Se observó un suministro continuo de magma desde la corteza profunda y el manto.
- La transferencia de magma se produjo desde un reservorio de la corteza media (aprox. 12 km) hasta un depósito poco profundo (aprox. 6 km).) se encuentra en el centro de la ciudad.
- Las erupciones episódicas se vincularon a la "ventilación" episódica del magma debajo del depósito poco profundo.
Conclusiones:
- El volcán Soufrière Hills opera con un sistema continuo de suministro de magma profundo.
- Las erupciones episódicas están controladas por la transferencia episódica de magma de un reservorio de la corteza media.
- Un modelo conceptual explica la periodicidad volcánica a través de un reservorio de magma con válvula en la corteza media.
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