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Un ambiente fluvio-lacustre habitable en la bahía de Yellowknife, el cráter Gale, Marte
J P Grotzinger1, D Y Sumner, L C Kah
1Division of Geologic and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.
Science (New York, N.Y.)
|December 11, 2013
Resumen
Marte Marte es el planeta Marte.
Área de la Ciencia:
- Astrobiología Astrobiología.
- Ciencias planetarias Ciencias planetarias.
- Geología Geología Geología.
Sus antecedentes:
- El antiguo Marte poseía entornos potencialmente adecuados para la vida.
- El rover Curiosity investiga la geología marciana y la habitabilidad.
Objetivo del estudio:
- Para analizar rocas sedimentarias en busca de evidencia de pasados entornos habitables en Marte.
- Para evaluar el potencial de una biosfera marciana quimiolithoautotrófica.
Principales métodos:
- Análisis de rocas sedimentarias de grano fino por el rover Curiosity.
- Condiciones ambientales inferidas basadas en la composición de las rocas y la mineralogía.
Principales resultados:
- Descubrimiento de antiguas rocas sedimentarias del lecho del lago.
- Identificación de un ambiente acuoso de pH neutro y baja salinidad con estados redox variables.
- Presencia de elementos biogénicos clave (C, H, O, S, N) y disponibilidad inferida de fósforo.
Conclusiones:
- Los ambientes marcianos fluviales-lacustrinos eran biológicamente viables.
- La evidencia sugiere que un entorno habitable sostenido existió en la historia post-noaica de Marte.
- Los hallazgos apoyan el potencial para la vida marciana pasada.
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