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Updated: Jul 12, 2025
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Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 15, 2013
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Impactor de formación de la Luna como fuente de las anomalías del manto basal de la Tierra
Qian Yuan1,2, Mingming Li3, Steven J Desch3
1School of Earth and Space Exploration, Arizona State University, Tempe, AZ, USA. qyuan@caltech.edu.
Nature
|November 2, 2023
Resumen
Las grandes provincias de baja velocidad de la Tierra (LLVP) pueden ser restos del material de Theia, el protoplaneta que formó la Luna. Este antiguo material del manto podría explicar la composición de estas estructuras profundas de la Tierra.
Área de la Ciencia:
- La geofísica
- Ciencias planetarias
- Ciencias de la Tierra
Sus antecedentes:
- El manto más bajo de la Tierra contiene grandes anomalías del tamaño de un continente llamadas grandes provincias de baja velocidad (LLVPs).
- Los LLVP se interpretan típicamente como heterogeneidades densas y de composición distintas dentro del manto.
Objetivo del estudio:
- Para investigar si los LLVPs podrían ser restos del material del manto de Theia (TMM) del impacto gigante que formó la Luna.
- Para modelar la preservación y acumulación de TMM en el manto de la Tierra.
Principales métodos:
- Simulaciones canónicas de impacto gigante para modelar la entrega de material desde Theia a la proto-Tierra.
- Modelado de convección del manto para rastrear el comportamiento del TMM denso en el tiempo geológico.
Principales resultados:
- Las simulaciones indican que una parte del manto de Theia podría haber sido incorporado al manto inferior de la proto-Tierra.
- Se estima que el material del manto de Theia es un 2,0-3,5% más denso que el manto de la proto-Tierra.
- Las densas manchas de TMM podrían hundirse, acumularse en el límite núcleo-manto y formar estructuras similares a LLVP que persisten hasta el día de hoy.
Conclusiones:
- Los LLVP pueden ser una consecuencia directa del impacto gigante que formó la Luna, representando el material preservado del manto de Theia.
- Este origen impulsado por el impacto sugiere que pueden existir heterogeneidades de manto similares en otros cuerpos planetarios.
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