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La tectónica del Himalaya se explica por la extrusión de un canal de corteza de baja viscosidad acoplado a una
C Beaumont1, R A Jamieson, M H Nguyen
1Department of Oceanography, Dalhousie University, Halifax, Nova Scotia, Canada, B3H 4J1.
Nature
|December 14, 2001
Resumen
El estudio vincula el crecimiento de la meseta y la exhumación de montañas en la región del Himalaya-Tíbet. La desnudación superficial conecta dinámicamente el flujo del canal de la corteza y la extrusión dúctil, explicando las características geológicas.
Área de la Ciencia:
- Las geociencias son ciencias geológicas.
- La tectónica es la tectónica.
- La geodinámica es la geodinámica.
Sus antecedentes:
- La tectónica himalayo-tibetana implica el crecimiento de la meseta hacia el exterior y la exhumación de la secuencia del Gran Himalaya.
- Los modelos anteriores proponían el flujo de canal y la extrusión dúctil como explicaciones separadas.
Objetivo del estudio:
- Para investigar el vínculo dinámico entre el flujo del canal y la extrusión dúctil.
- Para explicar el crecimiento hacia el exterior de la meseta tibetana y la exhumación de la secuencia del Gran Himalaya.
Principales métodos:
- Modelado numérico térmico-mecánico acoplado.
- Simulación de los efectos de desnudación superficial en una meseta de baja viscosidad.
Principales resultados:
- El flujo de canal y la extrusión dúctil están vinculados dinámicamente por la denudación superficial.
- Este vínculo es impulsado por la desnudación en el borde de la meseta sobre el material de baja viscosidad.
Conclusiones:
- Los modelos proporcionan una explicación autoconsistente para las características geológicas del Himalaya y el Tíbet.
- La desnudación de la superficie es un factor clave para vincular el flujo de la corteza y la exhumación de rocas.
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