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Un posible análogo terrestre para las concreciones de hematita en Marte
Marjorie A Chan1, Brenda Beitler, W T Parry
1Department of Geology and Geophysics, University of Utah, 135 S 1460 E, Salt Lake City, Utah 84112-0111, USA. machan@mines.utah.edu
Nature
|June 18, 2004
Resumen
Concretiones de hematita esférica en Marte, similares a las encontradas en Utah.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Geología Geología Geología.
- Astrobiología Astrobiología.
Sus antecedentes:
- La exploración de Marte revela evidencia de un pasado rico en agua en su subsuelo poco profundo.
- Las concreciones esféricas ricas en hematita encontradas en Meridiani Planum se asemejan a las concreciones diagenéticas terrestres.
Objetivo del estudio:
- Para comparar las concreciones marcianas con los análogos terrestres de la piedra arenisca Navajo.
- Para investigar mecanismos de formación análogos relacionados con el agua subterránea en Marte.
Principales métodos:
- Análisis comparativo de las concreciones esféricas de Marte y la piedra arenisca Navajo.
- Inferencia de las propiedades de la roca huésped y los procesos fluidos basados en las características de la concreción terrestre.
Principales resultados:
- Las concreciones marcianas y terrestres comparten sorprendentes similitudes morfológicas y de composición.
- La formación de estas concreciones esféricas en Marte implica condiciones geológicas específicas.
Conclusiones:
- Se infiere que la presencia de roca anfitriona permeable, el flujo de agua subterránea y un frente de reacción química son necesarios para la formación de la concreción marciana.
- Estos hallazgos apoyan la hipótesis de la actividad pasada del agua subterránea en Marte.
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