RT info:eu-repo/semantics/article
T1 Detection of organic compounds in impact glasses formed by the collision of an extraterrestrial material with the Libyan Desert (Africa) and Tasmania (Australia)
A1 Gómez Nubla, Leticia
A1 Aramendia, Julene
A1 Fernández Ortiz de Vallejuelo, Silvia
A1 Castro, Kepa
A1 Madariaga Mota, Juan Manuel
AB Impact glasses are rich silica melted formed at high temperature and pressure by the impact of an extraterrestrial body on Earth.Here, Libyan Desert glasses (LDGs) and Darwin glasses (DGs) were studied. Two non-destructive analytical techniques wereused to detect and characterize organic compounds present in their inclusions: Raman spectroscopy and scanning electronmicroscopy coupled to energy-dispersive X-ray spectroscopy (SEM-EDS). Phytoliths, humboldtine, palmitic acid, myristic acid,oleic acid, 4-methyl phthalic acid, and S-H stretching vibrations of amino acids were identified. The presence of these particularorganic compounds in such materials has not been reported so far, providing information about (a) the ancient matter of the areawhere the impact glasses were formed, (b) organic matter belonging to the extraterrestrial body which impacted on the Earth, or(c) even to current plant or bacterial life, which could indicate an active interaction of the LDG and DG with the surroundingenvironment. Moreover, the identification of fullerene allowed us to know a pressure (15 GPa) and temperatures (670 K or 1800–1900 K) at which samples could be subjected.
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/35256
UL http://uvadoc.uva.es/handle/10324/35256
LA eng
NO Analytical and Bioanalytical Chemistry, Julio 2018, vol. 410. p. 6609–6617
DS UVaDOC
RD 22-nov-2024