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dc.contributor.author J. C. en_US
dc.contributor.author Helen M. en_US
dc.contributor.author Geoff A. T. en_US
dc.contributor.author Y. I. en_US
dc.contributor.author S. B. en_US
dc.date.accessioned 2010-12-03T15:06:22Z
dc.date.available 2010-12-03T15:06:22Z
dc.date.issued 2009-02-01 en_US
dc.identifier http://dx.doi.org/10.1016/j.radmeas.2009.01.003 en_US
dc.identifier.citation Kim , J C , Roberts , H M , Duller , G A T , Lee , Y I & Yi , S B 2009 , ' Assessment of diagnostic tests for evaluating the reliability of SAR De values from polymineral and quartz fine grains ' Radiation Measurements , vol 44 , no. 2 , pp. 149-157 . , 10.1016/j.radmeas.2009.01.003 en_US
dc.identifier.other PURE: 154468 en_US
dc.identifier.other dspace: 2160/5973 en_US
dc.identifier.uri http://hdl.handle.net/2160/5973
dc.description.abstract In this study, we applied optically stimulated luminescence (OSL) dating to two fine grain sediment samples collected at Jeongokri, Korea. A single aliquot regenerative dose (SAR) procedure was applied to both polymineral grains and to chemically isolated (H2SiF6) quartz grains of 4–11 μm diameter. For polymineral fine grains, the OSL IR depletion ratio and the equivalent dose (De) plateau test appear to be equally sensitive indicators of appropriate IR stimulation time for use in the ‘double SAR’ protocol. Additionally, the OSL IR depletion ratio test gives an indication of the relative mineral composition of the samples, hence providing an assessment of the likelihood of obtaining a quartz-dominated [post-IR] OSL signal. Use of higher preheat temperatures would assist in thermally eroding the non-quartz component of the [post-IR] OSL signal from polyminerals. For the quartz fine grains, data from both natural De determinations and laboratory dose recovery tests are required to identify the appropriate preheat temperatures for dating, due to problems of thermal transfer. This phenomenon is particularly exaggerated for these samples due to the large De values (≥350 Gy) and hence low slope of the dose–response curve. The double SAR method cannot be applied ubiquitously, even after careful and rigorous study of one sample from a section. Quartz OSL dating using a range of preheat temperatures is suggested to be the most suitable method for OSL dating of fine grain sediments. In this study, we applied optically stimulated luminescence (OSL) dating to two fine grain sediment samples collected at Jeongokri, Korea. A single aliquot regenerative dose (SAR) procedure was applied to both polymineral grains and to chemically isolated (H2SiF6) quartz grains of 4–11 μm diameter. For polymineral fine grains, the OSL IR depletion ratio and the equivalent dose (De) plateau test appear to be equally sensitive indicators of appropriate IR stimulation time for use in the ‘double SAR’ protocol. Additionally, the OSL IR depletion ratio test gives an indication of the relative mineral composition of the samples, hence providing an assessment of the likelihood of obtaining a quartz-dominated [post-IR] OSL signal. Use of higher preheat temperatures would assist in thermally eroding the non-quartz component of the [post-IR] OSL signal from polyminerals. For the quartz fine grains, data from both natural De determinations and laboratory dose recovery tests are required to identify the appropriate preheat temperatures for dating, due to problems of thermal transfer. This phenomenon is particularly exaggerated for these samples due to the large De values (≥350 Gy) and hence low slope of the dose–response curve. The double SAR method cannot be applied ubiquitously, even after careful and rigorous study of one sample from a section. Quartz OSL dating using a range of preheat temperatures is suggested to be the most suitable method for OSL dating of fine grain sediments. en_US
dc.format.extent 9 en_US
dc.relation.ispartof Radiation Measurements en_US
dc.subject Fine grains en_US
dc.subject Polymineral en_US
dc.subject Quartz en_US
dc.subject IR stimulation duration en_US
dc.subject Dose recovery test en_US
dc.subject TL en_US
dc.subject [Post-IR] OSL en_US
dc.title Assessment of diagnostic tests for evaluating the reliability of SAR De values from polymineral and quartz fine grains en_US
dc.contributor.pbl Institute of Geography & Earth Sciences en_US
dc.contributor.pbl Quaternary Environmental Change Group en_US


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