Chronological and chemical approaches to obsidians from Bakla Tepe and Liman Tepe, Western Anatolia

In this study, the provenance of 42 obsidians from the Chalcolithic and Early Bronze Age levels of two settlements – Bakla Tepe and Liman Tepe – located on the Aegean coast of Anatolia were investigated with an interdisciplinary approach using fission-track (FT) dating, Instrumental Neutron Activation Analysis (INAA) and Epithermal Neutron Activation Analysis (ENAA). Some artefacts showed FT ages of a few thousand years. Apparent FT ages of the remaining samples are distributed over a wide range, from 0.53 ± 0.03 to 1.43 ± 0.20 Ma. After application of the size-correction method, most artefacts were distributed in a homogeneous group characterized by FT ages varying from 1.48 ± 0.47 to 1.80 ± 0.20 Ma, with a mean value of 1.65 ± 0.05 Ma and low induced track density corresponding to low U content. The remaining 3 samples showed relatively high induced track densities. One of them has an apparent age of 0.53 ± 0.03 Ma and a sizecorrected age of 1.02 ± 0.07 Ma. The probable potential sources for the studied samples were identified as the island of Melos in the Aegean, and the central Anatolian sources – particularly the Göllüdağ complex – through comparison of the FT data. INAA and ENAA studies have been carried out on 34 artefacts at the TRIGA Mark II research reactor of the University of Pavia. The identification of the sources was attained through cluster analysis of the chemical data. These results agree fully with those obtained by FT dating: most artefacts originated from the Melos–Dhemenegaki flow, and only 3 samples from central Anatolia. The current study provides a contribution to a better understanding of the circulation of obsidians in Anatolia

Obsidiyende fizyon izlerinin oluşumu ve obsidiyenlerin tarihlendirilmesi

TEZ136Tez (Fizik Yüksek Lisans) -- Çukurova Üniversitesi, Adana, 1981.Kaynakça (s. 97-102) var.102 s. : res. ; 31 cm.

Obsidiyenlerin fizyon izleriyle tarihlendirilmesi ve gruplama çalışmaları

TEZ177Tez (Doktora) -- Çukurova Üniversitesi, Adana, 1984.Kaynakça (s. 69-74) var.76 s. : res. ; 28 cm.

Provenance studies of obsidian artefacts in Anatolia: the contribution of the fission track analyses

International audienc

Provenance studies of obsidian artefacts in Anatolia using the fission-track dating method: an overview

International audienc

OSL from BeO:Al,Ca ceramics synthesized using sol-gel method

Beryllium Oxide (BeO) ceramic has been widely used for numerous applications in different fields of technology such as nuclear and technological research. Special interest in BeO as a material for personal dosimetry is because of its effective atomic number (Zeff =7.13), which is close to biological tissue (Zeff =7.42). In this study, BeO nanophosphors were synthesized for dosimetric purposes, and doped with aluminum and calcium using sol-gel method. BeO:Al,Ca pellets were prepared from pressed and sintered BeO:Al,Ca nanophosphors at 1600 °C. The structural characterization analysis of BeO:Al,Ca pellets were carried out using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and Scanning electron microscope (SEM) methods. The results of these structure analysis showed that BeO:Al,Ca pellets were successfully produced using the sol-gel method. Luminescence properties of the ceramic pellets produced using BeO nanophosphors were investigated by TL and OSL techniques. The bright OSL signal from BeO:Al,Ca was found as a combination of three decay components using general order kinetic fitting. Decay lifetimes of these components were determined as 5.16, 37.02 and 262.84 s, respectively. Additionally, TL glow curve of BeO:Al,Ca showed three peaks approximately located at 200, 350 and 520 °C. Optically active parts of TL glow curve were determined comparing TL glow curves obtained directly and following blue led stimulation. In order to understand mechanism of luminescence, thermal stability experiment was studied, and the source of the OSL signals was found associated with both the 350 and 520 °C TL peaks. OSL signals indicated very good reusability over 10 cycles and the most deviated value from the first readout was ~ 3 %. The beta dose response was found to be nearly linear in the range 0.1-100 Gy. Furthermore, X-ray luminescence, dark fading and minimum detectable dose properties of the OSL signal were investigated. We concluded that BeO:Al,Ca pellets with the bright OSL signals and low fading characteristics are good luminescent dosimetric materials for detection radiation dose between the dose range of 0.1 Gy to 100 Gy

Provenance studies of obsidian artefacts from turkish neolithic sites. An interdisciplinary approach by INAA and fission track dating.

This work reports the results of an interdisciplinary study aimed to contribute to a better understanding of circulation of obsidian during prehistoric times in Turkey. Fission-track (FT) dating and trace element composition by instrumental neutron activation analysis (INAA), were applied to obsidian artefacts from four Neolithic sites of eastern Anatolia and from Hocaçeçme, which is located near the Greek border, in the Edirne region. Both INAA as well as FT dating confirm that a variety of sources can be represented in the same site in the same stratigraphie level. Whereas the Anatolian studied sites yielded only artefacts originated from eastern Anatolian sources, those of Hocaçeçme have a Anatolian provenance (Gôllûdag and Hasandag volcanic complexes). An unambiguous identification was attained for some eastern Anatolian sources - the Bingôl and the Nemrut Dagi obsidians. For other sources only a generic attribution to the Bingôl - Mu§ - Karliova triangle and to the Quaternary volcanic edifices located along the north coast of Lake Van can be made. Results of this study confirm that further detailed field work is needed in order to attain an adequate stage of knowledge of the Anatolian potential natural sources of raw material of prehistoric obsidian artefacts.Ce travail présente les résultats d'une étude interdisciplinaire destinée à mieux comprendre la circulation de l'obsidienne durant la préhistoire en Turquie. La datation par traces de fission de l'Uranium (T.F.) et l'analyse élémentaire (INAA) ont été appliquées aux obsidiennes de quatre gisements néolithiques d'Anatolie orientale ainsi qu'à celui de Hocaçeçme dans la région d'Edirne, près de la frontière grecque. INAA comme T.F. indiquent la présence de plusieurs sources représentées dans un même gisement pour un niveau donné. Alors que les sites étudiés d'Anatolie ne contiennent que de l'obsidienne provenant d'Anatolie orientale, celui de Hocaçe§me a livré de l'obsidienne provenant d'Anatolie centrale (complexes volcaniques de Gôllûdag et de Hasandag). Certaines sources d'Anatolie orientale ont été clairement identifiées : Bingôl et Nemrut Dagi. Pour les autres sources, seule une attribution générique au triangle Bingôl-Mu§- Karliova d'une part et aux édifices quaternaires situés sur la côte nord du lac Van, d'autre part, ont pu être proposées. Ces résultats confirment que des études de terrain détaillées sont encore nécessaires pour obtenir une bonne connaissance des sources potentielles d'approvisionnement en matière première pour l'industrie lithique préhistorique.Oddone Massimo, Yeğingil Zehra, Özdoğan Mehmet, Meloni Sandro, Bigazzi Giulio. Provenance studies of obsidian artefacts from turkish neolithic sites. An interdisciplinary approach by INAA and fission track dating.. In: Revue d'Archéométrie, n°27, 2003. pp. 137-145