RT info:eu-repo/semantics/article
T1 Non-destructive characterisation of the Elephant Moraine 83227 meteorite using confocal Raman, micro-energy-dispersive X-ray fluorescence and Raman-scanning electron microscope-energy-dispersive X-ray microscopies
A1 Torre Fernández, Imanol
A1 Aramendia, Julene
A1 Gómez Nubla, Leticia
A1 Castro, Kepa
A1 Maguregui, Maite
A1 Fernández Ortiz de Vallejuelo, Silvia
A1 Arana, Gorka
A1 Madariaga Mota, Juan Manuel
AB The application of a non-destructive analytical procedure to characterise the mineral phases in meteorites is a key issue in order topreserve this type of scarce materials. In the present work, the Elephant Moraine 83227 meteorite, found in Antarctica in 1983and originated from 4 Vesta asteroid, was analysed by micro-Raman spectroscopy, micro-energy-dispersive X-ray fluorescenceand the structural and chemical analyser (Raman spectroscopy coupled with scanning electron microscopy-energy-dispersivespectroscopy) working in both point-by-point and image modes. The combination of all these techniques allows the extraction of,at the same time, elemental, molecular and structural data of the studied microscopic area of the meteorite. The most relevantresults of the Elephant Moraine 83227 were the finding of tridymite for the first time in a 4 Vesta meteorite, along with quartz,which means that the meteorite suffered high temperatures at a certain point. Moreover, both feldspar and pyroxenewere found asthe main mineral phases in the sample. Ilmenite, apatite, chromite and elemental sulphur were also detected as secondaryminerals. Finally, calcite was found as a weathering product, which was probably formed in terrestrial weathering processes ofthe pyroxene present in the sample. Besides, Raman spectroscopy provided information about the conditions that the meteoriteexperienced; the displacements in some feldspar Raman bands were used to estimate the temperature and pressure conditions towhich the Elephant Moraine 83227 was subjected, because we obtained both low and high formation temperature feldspar.
PB Springer
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/35257
UL http://uvadoc.uva.es/handle/10324/35257
LA eng
NO Analytical and Bioanalytical Chemistry, Septiembre 2018, vol. 410. p. 7477–7488
DS UVaDOC
RD 18-dic-2024