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Distribución de los filosilicatos en la superficie de Ceres
E Ammannito1, M C DeSanctis2, M Ciarniello2
1Earth Planetary and Space Sciences, University of California-Los Angeles, 603 Charles Young Drive, Los Angeles, CA 90095-1567, USA. eleonora.ammannito@igpp.ucla.edu.
Science (New York, N.Y.)
|October 5, 2016
Resumen
Los minerales filosilicatos están muy extendidos en el planeta enano Ceres, lo que indica un extenso proceso de alteración interna. Estos minerales que contienen magnesio y amonio sugieren que Ceres se formó a través de la actividad geológica endógena.
Área de la Ciencia:
- Ciencias planetarias
- Minerología
- Astrogeología
Sus antecedentes:
- Se sabe que el planeta enano Ceres posee minerales filosilicatos en su superficie.
- La distribución y el origen de estos minerales han permanecido indeterminados.
- Comprender la mineralogía es clave para descifrar la historia geológica de los cuerpos celestes.
Objetivo del estudio:
- Para mapear la distribución espacial de los filosilicatos en Ceres.
- Para determinar el origen de estos minerales de superficie.
- Para analizar la composición y la variabilidad de los filosilicatos de Ceres.
Principales métodos:
- Utilizó el espectrómetro a bordo de la nave Dawn.
- Mapeo de la distribución de minerales utilizando las características de absorción de diagnóstico en el espectro visible e infrarrojo cercano (0,25 5,0 micrómetros).
- Se analizaron las propiedades espectrales para inferir la composición y abundancia de minerales.
Principales resultados:
- Los filosilicatos que contienen magnesio y amonio están ubicuos en toda la superficie de Ceres.
- Las variaciones en la intensidad de las características de absorción indican diferencias significativas en la abundancia relativa de filosilicatos.
- La composición mineral es en gran medida uniforme a pesar de las variaciones de abundancia.
- Las propiedades espectrales de Ceres difieren de otros asteroides y meteoritos carbonáceos.
Conclusiones:
- Los filosilicatos de Ceres se formaron endógenamente.
- Su formación se debe a un proceso de alteración generalizado y extenso a nivel mundial.
- Estos hallazgos proporcionan información sobre la evolución geológica de los planetas enanos.
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