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Identificación espectroscópica inicial de materiales derivados del manto del lado lejano de la Luna
Chunlai Li1, Dawei Liu2, Bin Liu2
1Key Laboratory of Lunar and Deep Space Exploration, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China. licl@nao.cas.cn.
Nature
|May 17, 2019
Resumen
China también.
Área de la Ciencia:
- Ciencias planetarias
- Geología lunar
- Minerología
Sus antecedentes:
- La corteza de la Luna es principalmente plagioclase, que cubre un manto máfico de composición incierta, formado por un océano de magma.
- Las cuencas de impacto grandes, como la cuenca del Polo Sur-Aitken (SPA), pueden exponer materiales del manto.
- Los datos orbitales anteriores indicaron minerales máficos en la cuenca SPA, pero su origen y contexto geológico no estaban claros.
Objetivo del estudio:
- Investigar la composición y el origen de los materiales máficos en el suelo del cráter Von Kármán dentro de la cuenca SPA.
- Para utilizar los datos del rover Yutu-2 de la misión Chang'E-4 para analizar los minerales de la superficie lunar.
- Evaluar el posible origen del manto de los minerales observados y su contexto geológico.
Principales métodos:
- Análisis de los datos espectrales del espectrómetro visible e infrarrojo cercano (VNIS) a bordo del rover Yutu-2.
- Interpretación de las firmas mineralógicas, centrándose en el piroxeno y la olivina.
- Integración de datos espectrales con el contexto geológico de los eventos de cráteres de impacto.
Principales resultados:
- Las observaciones espectrales iniciales de VNIS indican la presencia de piroxeno y olivina con bajo contenido de calcio.
- Estos minerales son consistentes con los materiales originados en el manto lunar.
- El contexto geológico sugiere que estos materiales del manto fueron excavados por el cráter de impacto Finsen y transportados al sitio de aterrizaje.
Conclusiones:
- Los hallazgos proporcionan evidencia de materiales potenciales del manto lunar dentro de la cuenca SPA.
- La exploración del rover Yutu-2 en el cráter Von Kármán ofrece una oportunidad única para estudiar estos materiales in situ.
- La exploración adicional es crucial para comprender el origen, la abundancia y el potencial de retorno de muestras.
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