Dose estimation, kinetics and dating of fossil marine mollusc shells from northwestern part of Turkey

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dc.authoridKOMUT, Tolga/0000-0003-1248-9811
dc.authoridPAKSU, Ufuk/0000-0001-7457-7548
dc.contributor.authorAydas, Canan
dc.contributor.authorEngin, Birol
dc.contributor.authorKapan, Sevinc
dc.contributor.authorKomut, Tolga
dc.contributor.authorAydin, Talat
dc.contributor.authorPaksu, Ufuk
dc.date.accessioned2025-01-27T20:27:34Z
dc.date.available2025-01-27T20:27:34Z
dc.date.issued2015
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractElectron spin resonance (ESR) spectroscopy was used to determine the geological formation age of fossil mollusc shells taken from marine terrace deposits (Ikizlerceme-Canakkale) in northwestern part of Turkey. This work reports the first results obtained by the ESR technique on shells collected from this region. In the ESR spectra of the natural and gamma-irradiated shell samples, two different signals attributed to orthorombic (g(xx)=2.0030, g(zz)=2.0015, g(yy)=1.9980) and isotropic (g=2.0006) CO2- ion radicals were overlaped (Signal C). Annealing and kinetic experiments suggest the possibility of using the ESR signal at g=2.0015 (C signal) for the estimation of accumulated geological doses. The ESR signal growth curve on additional gamma irradiation has been best fitted by a combination of two single exponential saturation functions. This may support the existence of at least two components of the g=2.0015 ESR dating signal. Based on this model, the accumulated dose of the samples was determined as 110 +/- 11 Gy. Also the isothermal decay curves of the ESR dating signal could be best described by the combination of two first order decay functions. Activation energy and meanlifetime values at 15 C of the two components were calculated as E-1 = 1.4 +/- 0.1 eV, E-2 = 1.1 +/- 0.1 eV, tau(1) = 7.2 x 10(6) years and tau(2)=33 x 10(3) years, respectively. Uranium content of the studied shells was found to be high according to their chemical analysis. This may point out that the marine shell has received uranium from outside particularly in carbonate sediment. Therefore, the ESR age of the samples was also calculated using Early Uptake (EU), Linear Uptake (LU) and Combined Uptake (CU) models and results were discussed. (C) 2015 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipScientific Research Projects Coordination Center of Dokuz Eylul University (Izmir-Turkey) [2012. KB. FEN.012]; Scientific Research Projects Coordination Center of Canakkale Onsekiz Mart University (Canakkale-Turkey) [2010/68]
dc.description.sponsorshipThis work has been financially supported by the Scientific Research Projects Coordination Center of Dokuz Eylul University (Izmir-Turkey), Project no: 2012. KB. FEN.012.This work was also supported by the Scientific Research Projects Coordination Center of Canakkale Onsekiz Mart University (Canakkale-Turkey), Project no: 2010/68.
dc.identifier.doi10.1016/j.apradiso.2015.07.053
dc.identifier.endpage79
dc.identifier.issn0969-8043
dc.identifier.pmid26254035
dc.identifier.scopus2-s2.0-84939441057
dc.identifier.scopusqualityQ2
dc.identifier.startpage72
dc.identifier.urihttps://doi.org/10.1016/j.apradiso.2015.07.053
dc.identifier.urihttps://hdl.handle.net/20.500.12428/22725
dc.identifier.volume105
dc.identifier.wosWOS:000364254000014
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofApplied Radiation and Isotopes
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectElectron Spin Resonance (ESR)
dc.subjectESR dating
dc.subjectAragonite fossil shells
dc.subjectMollusc shell
dc.subjectCanakkale
dc.subjectTurkey
dc.titleDose estimation, kinetics and dating of fossil marine mollusc shells from northwestern part of Turkey
dc.typeArticle

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