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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:59 |
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Conference: Bucharest University Faculty of Physics 2012 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
A multi-analytical study of ancient Romanian pottery
Authors:
Ioana Maria CORTEA(1), O. G. DULIU (1), A.CHIROSCA (1), M.GHIUREA (2)
Affiliation:
(1) University of Bucharest, Faculty of Physics, Magurele, Romania
(2) The National Institute for Research & Development in Chemistry and Petrochemistry, Bucharest, Romania
E-mail
Keywords:
ancient potsherd, SEM, EDAX, XRD, TL, EPR, age
Abstract:
Different physico-chemical analytical methods were used to characterize several potsherds samples excavated from the archaeological site of Medieșu Aurit (Satu Mare, Romania). Dated between the 2nd and 4th century AD, these artifacts are of great historical and cultural value, a scientific study providing in-depth information on the technological features of the time being considered of interest. For the determination of the morphological, chemical and mineralogical characteristics of the potsherds Optical Microscopy (OM), Environmental Scanning Electron Microscopy coupled with Energy Dispersive X-ray system (ESEM-EDX), Powder X-ray Diffraction (XRD), Gamma-ray spectroscopy, Thermoluminescence (TL) as well as Electron Paramagnetic Resonance (EPR) were used.It has been found that the mineralogical composition for the selected samples is quite similar with quartz, micas and some argillaceous minerals as the main components. SEM images showed light textural variations for the studied samples with a high vitrified siliceous matrix for all of them, suggesting thus a high firing temperature, probably above 850°C. The chemical composition revealed the presence of characteristic clay elements such as Si, Al, Mg, K, Fe and Ti. No significant differences between the EPR spectra of all samples were evidenced, all of them being characterized by the presence of ferromagnetic iron clusters and the quasi-absence of characteristic Mn (II) spectrum. TL data revealed the presence of an intense maximum centered around degrees centigrade, making all samples suitable to be dated by this method. The good correlation between the results and the major mineralogical semblance for all samples examined point to the same period of manufacture and nonetheless to the same source of locally available materials.
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