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Las plumas del manto y la tectónica continental.

R I Hill, I H Campbell, G F Davies

Science (New York, N.Y.)

|April 10, 1992

Resumen

Las columnas del manto, aunque secundarias a la tectónica de placas para el transporte de calor, influyen significativamente en la geología continental a través de la elevación, el vulcanismo y la alteración de la corteza. Sus cabezas causan eventos geológicos iniciales, mientras que sus colas crean huellas de puntos calientes.

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Área de la Ciencia:

La geofísica es la geofísica.
Geología Geología Geología.
Ciencias de la Tierra Ciencias de la Tierra Ciencias de la Tierra

Sus antecedentes:

Las columnas del manto y la tectónica de placas son modos distintos de la convección de la Tierra.
Mientras que la tectónica de placas domina el transporte de calor, las plumas del manto juegan un papel crucial en la geología continental.

Objetivo del estudio:

Para aclarar el funcionamiento independiente y la importancia geológica de las plumas del manto.
Para detallar los procesos geológicos iniciados por las cabezas y colas de plumas.

Principales métodos:

Análisis de la evidencia geológica relacionada con la formación y actividad del penacho.
Datos de observación sobre el levantamiento, el vulcanismo y la deformación de la corteza asociada con plumas.

Principales resultados:

Los penachos del manto comienzan con grandes cabezas que causan elevación, inundación de basalto, volcanismo, metamorfismo y extensión de la corteza.
Las cabezas de plumaje son sucedidas por colas estrechas que generan pistas de puntos calientes.
El vulcanismo de las plumas tiene un impacto acumulativo en la corteza continental.

Conclusiones:

Los penachos del manto son impulsores significativos del cambio geológico en los continentes, independientemente de la tectónica de placas.
Comprender la dinámica de las plumas es clave para interpretar la historia geológica continental.