Analysis of the ordinary chondrite of Dalgety Downs (L4): Mineralogy, geochemistry and Raman spectroscopy
DOI:
https://doi.org/10.55407/geogaceta102470Keywords:
ordinary chondrites, chondrules, matrix, Raman spectroscopyAbstract
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.
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