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Formación de la cuenca lunar de varios anillos Orientale
Brandon C Johnson1, David M Blair2, Gareth S Collins3
1Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. brandon_johnson@brown.edu.
Science (New York, N.Y.)
|October 30, 2016
Resumen
Las simulaciones revelan cómo se formó la cuenca de múltiples anillos Orientales de la Luna. El colapso gravitacional y el flujo de material subterráneo fueron clave para crear sus distintos anillos, influenciados por el tamaño del impactador y los gradientes térmicos lunares.
Área de la Ciencia:
- Ciencias planetarias
- Cráteres de impacto
- Geología lunar
Sus antecedentes:
- Las cuencas multiringuidas son características prominentes en la Luna, impactando significativamente su estratigrafía, tectónica y estructura de la corteza.
- Comprender su formación es crucial para descifrar la historia geológica lunar.
Objetivo del estudio:
- Para simular la formación de la cuenca de múltiples anillos Orientale.
- Comprender la estructura subterránea y los mecanismos de formación de anillos.
Principales métodos:
- Utilizó un hidrocodo para las simulaciones de impacto.
- Comparó las estructuras subterráneas simuladas con datos de gravedad de alta resolución de la nave espacial Gravity Recovery and Interior Laboratory (GRAIL).
Principales resultados:
- La simulación produjo un cráter transitorio (~ 390 km de diámetro) que se derrumbó gravitacionalmente.
- La formación de los anillos exteriores fue impulsada por el flujo de material cálido y débil del subsuelo.
- Los anillos exteriores se identifican como fallas normales formadas durante el colapso.
Conclusiones:
- El diámetro del impactador y los gradientes térmicos lunares son parámetros críticos que controlan la ubicación y el espaciamiento de los anillos de la cuenca.
- El flujo de material subterráneo es esencial para la formación de cuencas múltiples.
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