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Control del estrés de la intrusión de grietas profundas en el volcán Mauna Loa, Hawai
Falk Amelung1, Sang-Ho Yun, Thomas R Walter
1Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA. famelung@rsmas.miami.edu
Science (New York, N.Y.)
|May 19, 2007
Resumen
El volcán Mauna Loa se infla debido a un cuerpo de magma profundo, lo que indica que la transferencia de estrés controla la acumulación de magma. Este hallazgo es crucial para comprender la deformación volcánica y el potencial de erupción.
Área de la Ciencia:
- La geofísica es la geofísica.
- Volcanología Volcanología.
- La detección remota con sensores.
Sus antecedentes:
- El volcán Mauna Loa, Hawai, exhibe deformación por intrusiones poco profundas y terremotos basales.
- La acomodación de la propagación en el edificio volcánico inferior sigue siendo poco comprendida.
Objetivo del estudio:
- Para investigar los procesos subterráneos que controlan la deformación en Mauna Loa.
- Para entender los mecanismos de acumulación de magma en las secciones inferiores del volcán.
Principales métodos:
- Se utilizaron datos del radar de apertura sintética (InSAR) interferométrico.
- Se analizaron los patrones de deformación entre 2002 y 2005.
Principales resultados:
- Se detectó inflación secular de un cuerpo de magma de profundidad intermedia, parecido a un dique, en la zona de grieta suroeste.
- Se observó la acumulación de magma en una sección de la zona de grieta que previamente no había sido afectada por intrusiones y terremotos.
Conclusiones:
- La acumulación de magma subterráneo está influenciada por la transferencia de estrés.
- Las intrusiones de diques poco profundos y los terremotos basales juegan un papel en el control de las vías de magma y las zonas de acumulación.
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