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Suelos del cráter Eagle y Meridiani Planum en el sitio de aterrizaje del Opportunity Rover
L A Soderblom1, R C Anderson, R E Arvidson
1U.S. Geological Survey, Flagstaff, AZ 86001, USA. lsoderblom@usgs.gov
Science (New York, N.Y.)
|December 4, 2004
Resumen
Marte Marte es el planeta Marte.
Área de la Ciencia:
- Geología Geología Geología.
- Ciencias planetarias Ciencias planetarias.
- La sedimentología sedimentológica.
Sus antecedentes:
- El rover Opportunity investigó los suelos en Meridiani Planum.
- Estos suelos están compuestos de arenas basálticas de grano fino, polvo y desechos ricos en sulfato.
Objetivo del estudio:
- Para caracterizar la composición y el origen de los suelos marcianos en el sitio de Opportunity.
- Para comprender los procesos geológicos que dan forma a Meridiani Planum.
Principales métodos:
- Análisis de muestras de suelo y roca por el rover Opportunity.
- Imágenes microscópicas y análisis de composición elemental.
Principales resultados:
- Las esféricas de hematita se concentran en la superficie, exhumadas por salazón.
- Los suelos están cubiertos con sales, posiblemente de la cementación subterránea.
- Las ondas eólicas blindadas por granos ricos en hematita están muy extendidas.
- La capa de suelo tiene aproximadamente un metro de espesor.
Conclusiones:
- Las características del suelo y las formas del relieve sugieren que Meridiani Planum puede ser una antigua superficie sedimentaria.
- La salazón y los procesos eólicos juegan un papel importante en la modificación de la superficie.
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