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La distribución global de la anortosita pura en la Luna
Makiko Ohtake1, Tsuneo Matsunaga, Junichi Haruyama
1Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshino-dai, Sagamihara, Kanagawa 229-8510, Japan.
Nature
|September 11, 2009
Resumen
La corteza de las tierras altas lunares contiene casi el 100% de plagioclasa, una abundancia más alta de lo estimado anteriormente. Este hallazgo proporciona datos cruciales para comprender la formación y evolución del océano de magma de la Luna.
Área de la Ciencia:
- Geología lunar geología lunar.
- Ciencias planetarias Ciencias planetarias.
- La mineralogía es la Mineralogía.
Sus antecedentes:
- La formación de la corteza de las tierras altas lunares está vinculada a un océano global de magma.
- Comprender la composición de la corteza es clave para los modelos de evolución lunar.
- Las estimaciones anteriores de la abundancia de plagioclase en la corteza lunar variaron.
Objetivo del estudio:
- Para determinar la distribución global y la abundancia de plagioclase en la corteza lunar de las tierras altas.
- Para refinar los modelos de formación y evolución de los océanos de magma lunar.
- Para utilizar datos espectrales de alta resolución para el análisis de la composición.
Principales métodos:
- Análisis de los datos del explorador de ingeniería y selenología (SELENE) Multiband Imager.
- Identificación de una banda de absorción de plagioclasa sin ambigüedades.
- Mapeo de la distribución global de las rocas con alta abundancia de plagioclase.
Principales resultados:
- Se identificó la distribución global de rocas con una abundancia de plagioclasa cercana al 100% vol.
- Esta alta abundancia de plagioclasa excede significativamente las estimaciones anteriores (82-92 vol.%).
Conclusiones:
- La corteza superior lunar puede consistir casi en un 100% de plagioclase.
- Estos hallazgos ofrecen una limitación significativa para los modelos de evolución del océano de magma lunar.
- Las imágenes de alta resolución y el análisis espectral son vitales para los estudios de la corteza lunar.
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