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Published on: August 5, 2016
Evidencia sísmica de flujo flotante inducido por puntos calientes debajo de la cresta de Reykjanes
1School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA.
Science (New York, N.Y.)
|September 5, 2001
Resumen
El punto caliente de Islandia influye en el surgimiento del manto por debajo de la cresta del Atlántico Medio. El análisis de ondas sísmicas revela una anisotropía de polarización anómala, lo que indica un flujo de manto impulsado por la flotabilidad inducido por el punto caliente.
Área de la Ciencia:
- La geofísica es la geofísica.
- Ciencias de la Tierra Ciencias de la Tierra Ciencias de la Tierra
- Dinámica del manto Dinámica del manto
Sus antecedentes:
- Los puntos calientes volcánicos y las crestas oceánicas son manifestaciones superficiales de la convección del manto.
- Su interacción ofrece información sobre la dinámica de surgimiento del manto.
Objetivo del estudio:
- Investigar la influencia del punto caliente de Islandia en la cresta del Atlántico Medio.
- Comprender la dinámica del flujo del manto en su intersección.
Principales métodos:
- Análisis de los tiempos de retraso de fase de las ondas de superficie sísmicas.
- Medición de la anisotropía de polarización anómala.
Principales resultados:
- Anisotropía de polarización anómala observada debajo de la cresta del Atlántico Medio.
- La anisotropía indica una discrepancia en el tiempo de retraso para las ondas sísmicas.
Conclusiones:
- El punto caliente de Islandia induce un importante aumento impulsado por la flotabilidad.
- Este flujo ascendente impacta el manto debajo de la colina adyacente del Atlántico Medio.
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