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Convección geotérmica a través de la corteza oceánica y sedimentos en el Océano Índico
Science (New York, N.Y.)
|May 25, 1979
Resumen
La convección celular del agua del fondo oceánico impulsa el flujo de calor oscilante a través del fondo marino. Este proceso geotérmico sigue siendo un importante mecanismo de transferencia de calor incluso en la corteza y los sedimentos oceánicos antiguos.
Área de la Ciencia:
- La geofísica es la geofísica.
- Oceanografía La oceanografía es la oceanografía.
- Geología marina Geología marina.
Sus antecedentes:
- El flujo de calor oceánico es crucial para comprender los procesos térmicos de la Tierra.
- Estudios anteriores sugirieron una actividad geotérmica generalizada, pero los patrones detallados no estaban claros.
Objetivo del estudio:
- Para investigar el patrón detallado del flujo de calor en el fondo del Océano Índico.
- Determinar los mecanismos que impulsan la transferencia de calor a través de la corteza oceánica y los sedimentos.
Principales métodos:
- Se llevaron a cabo encuestas de flujo de calor muy espaciadas en cuatro sitios cerca de las cordilleras central y sureste de la India.
- Perfiles de temperatura no lineales medidos con precisión para diferenciar la transferencia de calor conductiva y convectiva.
Principales resultados:
- Se identificaron patrones de flujo de calor oscilatorio consistentes con la convección celular del agua de fondo.
- Convección geotérmica activa observada en áreas del fondo marino que tienen entre 18 y 55 millones de años.
- Componentes de transferencia de calor conductivos y convectivos calculados.
Conclusiones:
- La convección celular, con longitudes de onda de 5-10 km, es un conductor primario de la transferencia de calor en las regiones estudiadas.
- La convección geotérmica es un componente importante de transferencia de calor incluso en la corteza y los sedimentos oceánicos antiguos.
- Más de un tercio del fondo oceánico global probablemente exhibe convección geotérmica celular activa.
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