Show simple item record Li, B. Li, S. H. Wintle, Ann G. 2011-06-09T11:51:28Z 2011-06-09T11:51:28Z 2008-03-28
dc.identifier.citation Li, B., S.H. Li, and A.G. Wintle. (2008). Overcoming environmental dose rate changes in luminescence dating of waterlain deposits. Geochronometria 30, 33-40. en_UK
dc.description.abstract This study investigates lacustrine and fluvial sediments on the Sala Us River in the Mu Us Desert in central north China. Significant changes in environmental dose rate in part of the section could be shown to have occurred from measurements of the present day radioactivity and by the age reversal for some samples that had been dated by optically stimulated luminescence (OSL) measurements on quartz. These changes in dose rate can be attributed to recent uptake of radioactive elements found in the sediments; this resulted in significant underestimation of the OSL ages. In this study, the new isochron method using K-feldspar grains has been applied to overcome the effects of changes in dose rate. Calculations are used to show that changes in the environmental dose rate factors, i.e. K, U, Th, water content and cosmic ray flux, and disequilibrium in the U and Th decay chains, e.g. radon escape, have a negligible effect on the isochron age. After applying the new isochron method, the effects of changes in dose rate caused by recent uptake of radioactive elements and changes in past water content were effectively overcome and true ages are obtained; this was verified by repeating the luminescence isochron measurements on samples of overlying and underlying sediments. en_UK
dc.language.iso en en_UK
dc.publisher Versita Publications en_UK
dc.relation.isreferencedby en_UK
dc.title Overcoming environmental dose rate changes in luminescence dating of waterlain deposits en_UK
dc.type Text en_UK
dc.type.publicationtype refereed published journal paper en_UK
dc.identifier.duplicate True

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