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El cambio climático del Cenozoico como posible causa de la subida de los Andes

Simon Lamb¹, Paul Davis

¹Department of Earth Sciences, Parks Road, Oxford, OX1 3PR, UK. simon.lamb@earth.ox.ac.uk

|October 24, 2003

Resumen

El cambio climático puede haber impulsado la elevación de la montaña de los Andes al influir en la dinámica de la zona de subducción. La inanición de sedimentos, impulsada por el clima, aumenta el estrés de cizallamiento, que sostiene los altos Andes.

Área de la Ciencia:

Geología Geología Geología.
Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
La tectónica es la tectónica.

Sus antecedentes:

La elevación de las montañas está tradicionalmente vinculada al cambio climático, no al revés.
La formación de los Andes es compleja, ya que involucra fuerzas litosféricas.

Objetivo del estudio:

Proponer un mecanismo donde el cambio climático del Cenozoico causó el ascenso de los Andes.
Para investigar el papel de la dinámica de la zona de subducción en la construcción de montañas.

Principales métodos:

Análisis del equilibrio de fuerzas en la litosfera sudamericana.
Examinando la relación entre los sedimentos subducidos, la tensión de corte y la altura de la montaña.

Principales resultados:

La altura y la tectónica de los Andes están controladas por la tensión de corte de la zona de subducción y los contrastes de flotabilidad.
La tensión de corte de la zona de subducción depende del volumen de los sedimentos subducidos.

Conclusiones:

La erosión impulsada por el clima y el control de la deposición de sedimentos, la subducción y la formación de montañas.
El hambre de sedimentos controlada por el clima en América del Sur conduce a un alto estrés de cizallamiento, que apoya la elevación de los Andes.

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