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La evidencia de un antiguo océano marciano en la topografía de las costas deformadas
J Taylor Perron1, Jerry X Mitrovica, Michael Manga
1Department of Earth & Planetary Science, University of California, Berkeley, California 94720, USA. perron@eps.harvard.edu
Nature
|June 15, 2007
Resumen
Marte Marte es el planeta Marte.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Geología Geología Geología.
Sus antecedentes:
- Las llanuras del norte de Marte pueden haber sido sede de un antiguo océano.
- Las características de la superficie interpretadas como paleoshorelines apoyan esta hipótesis.
- Las tendencias topográficas de larga longitud de onda desafían la teoría oceánica.
Objetivo del estudio:
- Para investigar la causa de la topografía de larga longitud de onda a lo largo de las paleoshorelines marcianas.
- Para conciliar los datos topográficos con la antigua hipótesis del océano marciano.
- Evaluar el papel de la verdadera migración polar en la configuración de la topografía marciana.
Principales métodos:
- Análisis de perfiles topográficos a lo largo de presuntas costas marcianas.
- Modelado de la deformación planetaria causada por el verdadero desplazamiento polar.
- Comparación de las trayectorias inferidas de los polos con las líneas de tiempo geológicas.
Principales resultados:
- La topografía de larga longitud de onda es consistente con la deformación de la verdadera deambulación polar.
- El true polar wander explica las tendencias topográficas observadas.
- La trayectoria inferida de los polos sugiere un verdadero evento de desplazamiento polar posterior a la subida volcánica de Tharsis.
Conclusiones:
- El true polar wander proporciona una explicación viable para la topografía de la costa marciana.
- La hipótesis del antiguo océano marciano se apoya en la explicación de la migración polar.
- Este hallazgo ofrece nuevos conocimientos sobre la historia geológica y climática de Marte.
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