Arnold, LeeDemuro, MartinaSpooner, NigelPrideaux, GavinMcDowell, Matthew CharlesCamens, Aaron B.Reed, Elizabeth H.Parés, Josep M.Arsuaga, Juan LuisBermúdez de Castro, José MaríaCarbonell i Roura, Eudald2023-06-172023-06-172018-02-031871-101410.1016/j.quageo.2018.01.004https://hdl.handle.net/20.500.14352/11991Previous assessments of thermally transferred optically stimulated luminescence (TT-OSL) signal resetting in natural sedimentary settings have been based on relatively limited numbers of observations, and have been conducted primarily at the multi-grain scale of equivalent dose (De) analysis. In this study, we undertake a series of single-grain TT-OSL bleaching assessments on nineteen modern and geological dating samples from different sedimentary environments. Daylight bleaching experiments performed over several weeks confirm that single-grain TT-OSL signals are optically reset at relatively slow, and potentially variable, rates. Single-grain TT-OSL residual doses range between 0 and 24 Gy for thirteen modern samples, with >50% of these samples yielding weighted mean De values of 0 Gy at 2σ. Single-grain OSL and TT-OSL dating comparisons performed on well-bleached and heterogeneously bleached late Pleistocene samples from Kangaroo Island, South Australia, yield consistent replicate age estimates. Our results reveal that (i) single-grain TT-OSL residuals can potentially be reduced down to insignificant levels when compared with the natural dose range of interest for most TT-OSL dating applications; (ii) the slow bleaching properties of TT-OSL signals may not necessarily limit their dating applicability to certain depositional environments; and (iii) non-trivial differences may be observed between single-grain and multi-grain TT-OSL bleaching residuals in some modern samples. Collectively, these findings suggest that single-grain TT-OSL dating may offer advantages over multi-grain TT-OSL dating in certain complex depositional environments.engjournal articlehttps://www.sciencedirect.com/science/article/pii/S187110141730208X?via%3Dihubopen access550.93551.79Luminescence datingThermally transferred optically stimulated luminescence (TT-OSL)Single-grainModern analoguesSpainAustraliaGeología estratigráficaPaleontología2506.19 Estratigrafía2416 Paleontología