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Las cordilleras oceánicas: discontinuidades, segmentos y grietas gigantes
Science (New York, N.Y.)
|August 30, 1991
Resumen
Las cordilleras del medio océano presentan una jerarquía de segmentos que influyen en la creación de nuevos fondos marinos. La longitud del segmento y los procesos del manto mantienen un equilibrio entre segmentos largos y cortos, dando forma a la geología del fondo oceánico.
Área de la Ciencia:
- Geología Geología Geología.
- La geofísica es la geofísica.
- La tectónica de placas es la tectónica de placas.
Sus antecedentes:
- Las cordilleras medio oceánicas están segmentadas por discontinuidades rígidas y no rígidas.
- Los patrones de segmentación dictan la creación de un nuevo fondo oceánico.
Objetivo del estudio:
- Para explicar la jerarquía de la segmentación de la cresta del océano medio.
- Comprender los factores que controlan la longitud y la persistencia del segmento.
Principales métodos:
- Observaciones geológicas de las crestas oceánicas medias.
- Análisis de los patrones de segmentación y su relación con la tectónica de placas.
Principales resultados:
- Existe una jerarquía de tamaños de segmentos, desde grandes y de larga duración hasta pequeños y transitorios.
- La longitud del segmento influye en la fuerza de propagación de la grieta, favoreciendo a los segmentos más largos.
- La fusión parcial y los cambios en la dirección de propagación generan nuevos segmentos cortos.
Conclusiones:
- La segmentación de la cresta es un proceso dinámico que equilibra las longitudes de los segmentos.
- La longitud del segmento y la dinámica del manto son claves para los patrones de creación del fondo oceánico.
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