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Reconstrucción 3D de la fuente y la escala de los canales de inundación jóvenes enterrados en Marte
Gareth A Morgan1, Bruce A Campbell, Lynn M Carter
1Center for Earth and Planetary Studies, Smithsonian Institution, Washington, DC, USA. morganga@si.edu
Science (New York, N.Y.)
|March 9, 2013
Resumen
Inundaciones gigantes de las erupciones de agua subterránea tallaron el canal de salida Marte Vallis de Marte. Nuevos datos de radar 3D revelan canales más profundos y una extensión de inundación más larga, desafiando las ideas anteriores sobre la actividad hidrológica de Marte.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Hidrología Hidrología Hidrología.
- Geología Geología Geología.
Sus antecedentes:
- Los canales de salida en Marte sugieren inundaciones masivas de agua subterránea.
- Marte Vallis, un gran canal de salida joven, está oscurecido por los flujos de lava, lo que limita el estudio.
- Comprender Marte Vallis es clave para evaluar la reciente actividad hidrológica de Marte.
Objetivo del estudio:
- Para reconstruir canales enterrados en Marte utilizando datos de radar.
- Para estimar los parámetros paleohidrológicos para Marte Vallis.
- Para investigar la fuente y la extensión del agua que tallaba Marte Vallis.
Principales métodos:
- Se utilizaron datos del instrumento de radar de poca profundidad (SHARAD) en el Mars Reconnaissance Orbiter (MRO).
- Generó una reconstrucción tridimensional (3D) de las estructuras de canales subterráneos.
- Analizó perfiles de radar para inferir las dimensiones y evolución del canal.
Principales resultados:
- Identificó a Cerberus Fossae como la fuente de agua para Marte Vallis.
- Extendió la extensión oriental conocida del canal en 180 km.
- Las profundidades de canal determinadas fueron más del doble de las estimaciones anteriores, lo que indica dos etapas de incisión.
Conclusiones:
- Las inundaciones de agua subterránea de Cerberus Fossae fueron responsables de tallar Marte Vallis.
- Marte Vallis representa una significativa actividad hidrológica reciente en Marte.
- Los hallazgos requieren una comprensión revisada de la paleohidrología marciana y la formación de canales.
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