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La evidencia geológica de la convección en estado sólido en la capa de hielo de Europa
R T Pappalardo1, J W Head, R Greeley
1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912-1846, USA. robert_pappalardo@brown.edu
Nature
|February 5, 1998
Resumen
La ciudad de Europa Europa Europa Europa Europa Europa es el lugar donde se encuentra la ciudad de Europa.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La geofísica es la geofísica.
- Astrobiología Astrobiología.
Sus antecedentes:
- Europa, una luna de Júpiter, tiene una superficie geológicamente activa y rica en hielo.
- El calor interno de las fuerzas de marea puede mantener una capa de agua líquida subterránea.
- Los mecanismos de pérdida de calor y rejuvenecimiento de la superficie siguen sin estar claros.
Objetivo del estudio:
- Para investigar los procesos geológicos que dan forma a la superficie de Europa.
- Para interpretar las características de la superficie observadas por la nave espacial Galileo.
- Para evaluar la evidencia de un océano de agua líquida subterránea.
Principales métodos:
- Análisis de imágenes de alta resolución de Europa tomadas por la nave espacial Galileo.
- Interpretación morfológica y geológica de las características de la superficie (pozos, cúpulas, manchas).
- Modelado de la convección del estado sólido inducida térmicamente dentro de la capa de hielo de Europa.
Principales resultados:
- Se identificaron características de superficie distintas interpretadas como diapires (masas de hielo caliente en aumento).
- La formación de estas características se explica por la convección del estado sólido en la capa de hielo.
- Los resultados son consistentes con una posible capa de agua líquida subterránea o océano.
Conclusiones:
- El surgimiento diapírico impulsado por la convección del estado sólido es un mecanismo plausible de reaparición en Europa.
- Los hallazgos apoyan la hipótesis de un océano de agua líquida subterránea.
- Se requieren más observaciones para obtener evidencia concluyente de un océano europeo.
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