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Dual energy gamma-ray axial computer tomography investigation of some metamorphic and sedimentary rocks

Domenii publicaţii > Ştiinţele pământului şi planetare + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Costel Rizescu, Octavian Duliu, Calin Rickman

Editorial: Neues Jahrbuch für Geologie und Paläontologie Abhandlungen, Volume 228 (3), p.343 - 362, 2003.


Four specimens of metamorphic and sedimentary rocks were investigated using 192-Iridium dual energy gamma-ray computer tomography. Using this methodology, tomographs, depicting density as well as effective atomic number distribution with a 0.3 mm resolution, were obtained. Various details were evidenced including the granular structure of augen gneiss, the well-developed foliation pattern of mica rich gneiss, the banded configuration of nummulitic limestone or the concentric disposition of calcite microcrystals in a speleothem. In addition, the corresponding image histograms rendered amn identification of both major and minor components of investigated rocks possible.

Cuvinte cheie: metamorphic and sedimentary rocks, tomography, dual energy CT method, 192-Iridium, augen gneiss, mica, nummulitic limestone, speleothem