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Un profundo límite entre la corteza y el manto en el asteroide 4 Vesta
Harold Clenet1, Martin Jutzi2, Jean-Alix Barrat3
1EPSL, Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 3, CH-1015 Lausanne, Switzerland.
Nature
|July 18, 2014
Resumen
El asteroide Vesta fue descubierto.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Investigación de asteroides Investigación de asteroides.
- La geofísica es la geofísica.
Sus antecedentes:
- El asteroide 4 Vesta exhibe dos grandes cráteres de impacto cerca de su polo sur.
- Estos cráteres exponen material subterráneo, ofreciendo información sobre la estructura interna de Vesta.
- El modelado anterior indicaba diferentes profundidades para el material de la superficie en los hemisferios de Vesta.
Objetivo del estudio:
- Para analizar los datos del asteroide 4 Vesta.
- Para determinar la profundidad del límite entre la corteza y el manto de Vesta (Moho).
- Para investigar la composición de las capas exteriores de Vesta.
Principales métodos:
- Análisis de los datos del cráter de impacto del asteroide 4 Vesta.
- Modelado de la exposición del material subterráneo.
- Interpretación geofísica de la estructura de Vesta.
Principales resultados:
- El material de la superficie en el hemisferio norte de Vesta se origina a una profundidad de ~20 km.
- El material del sur expuesto se origina a 60-100 km de profundidad.
- La ausencia de olivino significativo sugiere que los ~ 100 km exteriores son principalmente corteza ígnea.
Conclusiones:
- El límite de la corteza y el manto (Moho) del asteroide 4 Vesta tiene una profundidad de más de 80 km.
- Las capas exteriores de Vesta están compuestas predominantemente por una corteza ígnea.
- Los eventos de impacto proporcionan datos cruciales para comprender el interior de los asteroides.
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