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Estructura y evolución de la región Procellarum lunar según lo revelado por los datos de gravedad de GRAIL
Jeffrey C Andrews-Hanna1, Jonathan Besserer2, James W Head3
1Department of Geophysics and Center for Space Resources, Colorado School of Mines, Golden, Colorado 80401, USA.
Nature
|October 4, 2014
Resumen
La región Procellarum.
Área de la Ciencia:
- Geología lunar geología lunar.
- La geofísica es la geofísica.
- Ciencias planetarias Ciencias planetarias.
Sus antecedentes:
- La región Procellarum en el lado cercano de la Luna tiene bajas elevaciones, una corteza delgada y altas concentraciones de elementos productores de calor.
- Las interpretaciones anteriores sugirieron que era una antigua cuenca de impacto, pero la evidencia superficial está oscurecida por la edad y la mala conservación.
Objetivo del estudio:
- Examinar la estructura subterránea de la región del Procellarum utilizando datos de la misión Gravity Recovery and Interior Laboratory (GRAIL).
- Reevaluar el origen geológico de la región Procellarum.
Principales métodos:
- Análisis de las anomalías de la gravedad de Bouguer y los gradientes de gravedad de los datos de la misión GRAIL.
- Interpretación de las estructuras subterráneas reveladas por los datos de gravedad.
Principales resultados:
- Los datos de GRAIL revelan anomalías lineales que bordean Procellarum, interpretadas como antiguas grietas llenas de lava y diques de alimentación.
- Estas estructuras forman un patrón casi rectangular, no la forma circular esperada de una cuenca de impacto.
- Las características de la superficie que anteriormente se pensaba que eran un borde de cuenca de impacto forman parte de este sistema continuo magmático-tectónico.
Conclusiones:
- Las estructuras limítrofes de la región del Procellarum son de origen magmático-tectónico, no de una cuenca de impacto.
- Su formación está relacionada con las tensiones térmicas del enfriamiento diferencial y la actividad magmática impulsada por el alto flujo de calor.
- Esto proporciona nuevos conocimientos sobre la historia volcánica y tectónica de la Luna.
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