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Updated: Feb 27, 2026

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Cinemáticas episódicas en grietas continentales moduladas por cambios en la fracción de fusión del manto
Simon Lamb1, James D P Moore2, Euan Smith1
1Institute of Geophysics, Victoria University of Wellington, Wellington, New Zealand.
Nature
|July 7, 2017
Resumen
Datos geodésicos del GPS de Nueva Zelanda
Área de la Ciencia:
- La geofísica
- Tectónica
- Volcanología
Sus antecedentes:
- La corteza oceánica se forma en los centros de extensión del fondo marino donde se derrite la roca del manto.
- La observación directa del derretimiento del manto bajo los océanos es un desafío.
- Las grietas continentales ofrecen oportunidades para estudiar la producción de fusión del manto utilizando datos geodésicos.
Objetivo del estudio:
- Usar datos geodésicos de una grieta continental para inferir el flujo del manto y los procesos de fusión.
- Investigar la dinámica del surgimiento del manto y la generación de derretimiento.
- Comprender el vínculo entre los procesos del manto y la deformación de la superficie.
Principales métodos:
- Análisis de diez años de campaña y mediciones continuas de GPS en la zona volcánica de Taupo, Nueva Zelanda.
- Aplicación de un modelo de flexión para explicar la deformación de la corteza observada.
- Interpretación de los datos geodésicos en el contexto del surgimiento del manto y la dinámica del derretimiento.
Principales resultados:
- La zona volcánica de Taupo se extiende a una velocidad de 6-15 mm/año.
- Un segmento de 70 km muestra contracción horizontal y hundimiento, flanqueado por elevación y extensión.
- Estas características son consistentes con las fuerzas episódicas inducidas por el derretimiento del manto ascendente que influyen en la flexión de la corteza.
Conclusiones:
- Los datos geodésicos de las grietas continentales proporcionan información sobre los procesos de fusión del manto relevantes para los centros de propagación oceánica.
- Los cambios episódicos en la fracción de fusión del manto impulsan el flujo transitorio de la corteza inferior y la deformación de la superficie.
- Este estudio demuestra la utilidad de las técnicas geodésicas en la comprensión de los procesos profundos de la Tierra.
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