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La acumulación y la erosión de los depósitos en capas del polo sur de Marte
Roberto Seu1, Roger J Phillips, Giovanni Alberti
1Dipartimento INFOCOM, Università di Roma "La Sapienza," I-00184 Rome, Italy. roberto.seu@uniroma1.it
Science (New York, N.Y.)
|September 22, 2007
Resumen
Mapa de radar detallado de Marte hecho por radar.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Geología Geología Geología.
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
Sus antecedentes:
- Las regiones polares de Marte presentan depósitos en capas ricos en hielo.
- Estos depósitos pueden preservar un registro de las variaciones del clima marciano.
Objetivo del estudio:
- Para trazar un mapa detallado de la estratigrafía subterránea en la región de Promethei Lingula de Marte.
- Para investigar la estructura y la historia erosional potencial de estos depósitos polares.
Principales métodos:
- Utilizó el instrumento de radar de sonido SHARAD a bordo del Orbitador de Reconocimiento de Marte.
- Las reflexiones de radar correlacionadas se interpretan como capas a través de trayectorias orbitales adyacentes.
Principales resultados:
- Se han identificado capas continuas de hasta 150 km de longitud.
- Se han observado secuencias discretas de reflectores que se extienden hasta 1 km de profundidad.
- Se detectaron capas de inmersión y estratos exhumados en Australe Sulci, lo que indica erosión.
Conclusiones:
- La estratigrafía subterránea del Planum Australe revela complejos procesos de deposición y erosión.
- La evidencia sugiere períodos de erosión entre eventos de deposición, con erosión reciente en algunas áreas.
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