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Published on: August 5, 2016
Control estructural del volcanismo de flanco en las grietas continentales
Resumen
Los volcanes a menudo se forman cerca de fallas normales en las zonas de grieta. Un modelo de placa flexible revela que la deformación de la corteza crea un campo de tensión de dilatación, lo que permite que el magma se eleve y forme volcanes.
Área de la Ciencia:
- Geología Geología Geología.
- Volcanología Volcanología.
- La tectónica es la tectónica.
Sus antecedentes:
- Los volcanes ocurren con frecuencia en los flancos de los pies de las fallas normales dentro de las zonas de grieta continental.
- Esta asociación es desconcertante debido a la topografía típicamente elevada y las pequeñas estructuras de compresión observadas en estos sitios.
Objetivo del estudio:
- Investigar la relación enigmática entre las fallas normales en las grietas continentales y la actividad volcánica.
- Para explicar cómo los edificios volcánicos pueden formarse en el pie de las fallas normales.
Principales métodos:
- Se empleó un simple modelo de placa de flexión para simular la deformación de la corteza.
- El análisis se centró en el campo de deformación generado en la corteza superior durante las fallas normales.
Principales resultados:
- Las fallas normales en una corteza superior soportada flexuralmente generan un campo de deformación de dilatación en la base de la corteza.
- Este campo de tensión específico facilita el agrietamiento y el tapping de magma preexistente.
Conclusiones:
- El estudio proporciona una explicación mecánica para la aparición de volcanes en el pie de las fallas normales en las grietas continentales.
- La deformación flexural durante las fallas es clave para crear vías para el ascenso del magma.
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