The importance of pre-annealing treatment for ESR dating of mollusc shells: A key study for İsmil in Konya closed Basin/Turkey
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Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
American Institute of Physics
Abstract
Abstract. In this study, Electron Spin Resonance (ESR) spectroscopy is used to determine the geological ages of fossil mollusc shells systematically collected from two different geological splitting at İsmil Location (37.72769 o N, 33.17781o E) in eastern part of Konya. According to the assessment of obtained ESR ages, the importance of pre-annealing treatment emphasize in the case of g=2.0007 dating signal is overlapped with the other signals arisen from short lived radicals that cause the wrong age calculation. To overcome this problem, the samples are pre-annealed at 180°C for 16 minutes and, in this case ESR ages are recalculated for g=1.9973 dating signal. Dose response curves are obtained using 1.9973 signals after pre-annealing treatments for each samples. ESR ages of samples are obtained in the range of 138 ± 38 ka and 132 ± 30 ka (Upper Pleistocene) according to the Early Uranium Uptake model and the results are in good agreement with the estimated ages from stratigraphic and paleontological
correlation by geologists. Thus, it is suggested that especially in the case of 2.0007 dating signal cannot been used due to
superimposition case, the signal with 1.9973 g value can be used for dating after pre-annealing treatment. The results reports the
first ESR ages on shells collected from İsmil Location and highlight the importance of pre-annealing treatment. This study issupported by TUBITAK 114Y237 research project.
Description
Keywords
ESR, Konya, ESR dating, ESR tarihilendirme, Electron spin resonance (ESR), Elektron spin rezonansı (ESR), Pleistocene, Pleistosen, Pre-Annealing treatment, Anilasyon, İsmil Konya
Citation
Ekici, G. ... [ve arkadaşları]. (2018). The importance of pre-annealing treatment for ESR dating of mollusc shells: A key study for İsmil in Konya closed Basin/Turkey. AIP Conference Proceedings 1935(140002)-1-4.