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Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 16, 2013
Modelos esféricos tridimensionales de convección en el manto de la Tierra
Resumen
Los modelos de convección del manto muestran plumas cilíndricas y láminas planas como características primarias. Estos hallazgos sugieren que los puntos calientes son ascendentes activos, mientras que las crestas del océano medio son pasivas, impulsadas por losas descendentes.
Área de la Ciencia:
- La geofísica es la geofísica.
- Ciencias de la Tierra Ciencias de la Tierra Ciencias de la Tierra
- Modelado de la convección.
Sus antecedentes:
- La convección del manto impulsa la tectónica de placas de la Tierra y las características de la superficie.
- La dinámica de las columnas ascendentes y las losas descendentes es clave para comprender la circulación del manto.
Objetivo del estudio:
- Para investigar las estructuras primarias de la convección del manto utilizando modelos esféricos en 3D.
- Para determinar la naturaleza de las plumas del manto y su relación con los puntos calientes.
- Para aclarar el papel de las zonas de subducción y las crestas del océano medio en la dinámica del manto.
Principales métodos:
- Desarrollo y simulación de modelos tridimensionales y esféricos de la convección del manto.
- Análisis de los patrones de flujo resultantes, identificando características clave como plumas y losas.
Principales resultados:
- Las plumas cilíndricas ascendentes y las hojas planas descendentes se identifican como características primarias de la circulación del manto.
- Las zonas de subducción y las losas descendentes son fundamentales para la convección térmica, no solo como consecuencia de la rigidez de la losa.
- Las plumas cilíndricas del manto, responsables de puntos calientes como Hawai, parecen ser la única forma de surgimiento activo.
- Las ondas ascendentes activas en forma de lámina, potencialmente vinculadas a las crestas oceánicas medias, no surgieron en las simulaciones.
Conclusiones:
- Las columnas del manto son ascendentes activas, parte integrante de la circulación a gran escala.
- Las zonas de subducción son fundamentales para la convección del manto.
- Es probable que las cordilleras oceánicas sean rasgos pasivos, influenciados por la atracción de losas descendentes.
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