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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:07 |
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Conference: Bucharest University Faculty of Physics 2022 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
X-ray microtomographic investigation of Dobrudja Green Schists: A preliminary analysis
Authors:
Daniel Stoicescu(1,2), Ioana Poroșnicu(2,3), Daniela Dimofte(4), Octavian G. Duliu (5,6)
*
Affiliation:
1) Horia Hulubei-National Institute for Physics and Nuclear Engineering, 30, Reactorului str, 077125 Magurele (Ilfov), Romania
2) Doctoral School of Physics, Faculty of Physics, University of Bucharest, 405, Atomiștilor str., 077125 Magurele (Ilfov), Romania
3) National Institute for Laser, Plasma and Radiation Physics, Atomiștilor 409, 077125,
Bucharest-Magurele, Romania
4) Department of Mineralogy, Faculty of Geology and Geophysics, University of Bucharest, Traian Vuia 6, 020956, Bucharest
5) Department of Structure of Matter, Earth and Atmospheric Physics and Astrophysics, Faculty of Physics, University of Bucharest, 405, Atomiștilor str., 077125 Magurele (Ilfov), Romania
6) Geological Institute of Romania, 1, Caransebes str., 012271 Bucharest, Romania
E-mail
daniel.stoicescu18@gmail.com
Keywords:
greenschist, X-ray computed microtomography, Dobrudja
Abstract:
Analytical and chemical methods based on the interaction of X rays with material are widely considered and applied in geology. X-ray Computed Microtomography (MCT) is of particular interest due to its capability to emphasize complex internal structures such as voids, inclusions or any other type of inhomogeneities. The present study reports a preliminary analysis of several greenschist samples from the Topolog area, Dobrudja (Romania), in order to investigate the internal structure and of the probes, with the aim to identify features of transformation during metamorphism. The images acquired using X ray MCT emphasize the presence of microstructures related to shearing, oriented voids, parallel and oblique fractures, which might be related to faulting and inclusions. One of the investigated samples, the SV 4 one is of particular interest due to the presence of euhedral/framboidal pyrite crystals [1]. Future analyses are planned to include the determination of the Dobrudja greenschists chemical and mineralogical composition extended the pyrite crystals.
References:
1. Scott RJ, Meffre S, Woodhead J, et al. (2009). Development of framboidal pyrite during diagenesis, low-grade regional metamorphism, and hydrothermal alteration. Ec. Geol. 104: 1143-1168, httpx://doi.org/10.2113/gsecongeo.104.8.1143
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