Publication: Análisis de la condrita ordinaria Dalgety Downs (L4):
Mineralogía, geoquímica y espectroscopía Raman
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Publication Date
2021
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Sociedad Geológica de España
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Abstract
El meteorito de Dalgety Downs, hallado en el Desierto de Australia Occidental, es una condrita ordinaria muy poco estudiada, que sin embargo contiene una valiosa información acerca de la evolución de la materia primitiva del Sistema Solar y los procesos que le afectan. Este ejemplar presenta unas características texturales, mineralógicas y geoquímicas en la matriz y cóndrulos que revelan procesos metamórficos de temperaturas intermedias y eventos de impacto moderados, además de una intensa alteración desarrollada durante su entrada en la atmósfera terrestre y su posterior exposición al clima, en lo que se define como la costra de fusión. Entre los métodos empleados en este estudio destaca la espectroscopía Raman como herramienta de identificación mineralógica, técnica que ha demostrado una gran precisión en materiales geológicos y que será empleada en próximas misiones espaciales.
The Dalgety Downs meteorite, found in the Western Australian Desert, is a poorly studied ordinary chondrite, that however contains valuable information about the Solar System primitive matter evolution and the processes that affect it. This specimen exhibits textural, mineralogical and geochemical characteristics in matrix and chondrules that reveal metamorphic processes of intermediate temperatures and moderate impact events, in addition to an intense alteration developed during its entry into the terrestrial atmosphere and later exposure to climate, in what is defined as the fusion crust. Among the methods employed in this study, Raman spectroscopy highlights as a mineralogical identification tool, a technique of high precision in the analysis of geological materials and that is expected to be used in upcoming space missions
The Dalgety Downs meteorite, found in the Western Australian Desert, is a poorly studied ordinary chondrite, that however contains valuable information about the Solar System primitive matter evolution and the processes that affect it. This specimen exhibits textural, mineralogical and geochemical characteristics in matrix and chondrules that reveal metamorphic processes of intermediate temperatures and moderate impact events, in addition to an intense alteration developed during its entry into the terrestrial atmosphere and later exposure to climate, in what is defined as the fusion crust. Among the methods employed in this study, Raman spectroscopy highlights as a mineralogical identification tool, a technique of high precision in the analysis of geological materials and that is expected to be used in upcoming space missions