Reliability of equivalent-dose determination and age-models in the OSL dating of historical and modern palaeoflood sediments

Medialdea, Alicia; Thomsen, Kristina Jørkov; Murray, Andrew; Benito, Gerardo

doi:10.1016/j.quageo.2014.01.004

Cited by 92 publications

(74 citation statements)

References 49 publications

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“…However, since the quartz OSL age estimates from single grains and small aliquots perfectly agree with the age derived from the much harder-to-bleach pIRIR 290 signal, this gives strong support to a well-bleached quartz OSL signal. This confirms the assumption that partial bleaching is not necessarily an impediment to obtaining accurate chronologies for Late Pleistocene alluvial samples (Jain et al, 2004;Martins et al, 2010;Sohbati et al, 2012 andMedialdea et al, 2014).…”

Section: Extrinsic Sources Of Uncertaintysupporting

confidence: 75%

Luminescence Dating of Fluvial Deposits in the Rock Shelter of Cueva Antón, Spain

et al. 2015

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Abstract:The fluvial sediments at Cueva Antón, a Middle Palaeolithic rock shelter located in the valley of the River Mula (Southeast Spain), produced abundant lithic assemblages of Mousterian affinities. Radiocarbon dates are available for the upper part of the archaeological succession, while for the middle to lower parts chronometric data have been missing. Here we present luminescence dating results for these parts of the succession. Quartz OSL on small aliquots and single grain measurements yield ages ranging from 69 ± 7 ka to 82 ± 8 ka with a weighted mean of 72 ± 4 ka for sub-complexes AS2 to AS5. Equivalent dose estimates from large aliquots were highest and inconsistent with those from single grains and small multiple grain aliquots. This is probably caused by the presence of oversaturating grains, which have been quantified by single grain measurements. Additional post-IR IRSL measurements on coarse grained feldspar give strong support to a well-bleached quartz OSL signal. While independent chronometric control is missing, the results are within the expected age range and support the notion of a rapid accumulation of the fluvial deposits.

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Section: Extrinsic Sources Of Uncertaintysupporting

confidence: 75%

Luminescence Dating of Fluvial Deposits in the Rock Shelter of Cueva Antón, Spain

et al. 2015

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“…Current development of age models for incompletely bleached sediments (e.g. Sim et al, 2014;Medialdea et al, 2014) may enable inclusion of affected samples in probability analyses of dated samples in future.…”

Section: Inclusion Of Osl Ages: the Eastern Mediterranean Databasementioning

confidence: 99%

Meta-analysis of Holocene fluvial sedimentary archives: A methodological primer

Jones

Macklin

Benito

2015

CATENA

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This paper describes developments in the analysis and interpretation of Holocene fluvial chronologies over the past 25 years. Particular consideration is given to meta-analysis approaches pioneered by Macklin and Lewin (2003), using radiocarbon-dated fluvial deposits in Britain, which have transformed fluvial geochronologies and correlations with climate and land-use records worldwide. During the last decade methodological developments have addressed issues such as correction for the shape of the radiocarbon calibration curve in the probability analysis of dated fluvial units and for variable alluvial unit preservation. The number of regional database analyses of fluvial sedimentary archives has also expanded significantly during the past decade, with studies now available for Africa, the Mediterranean region, India, Ireland, New Zealand, Poland, the Rhine catchment and the UK. Methods for incorporating optically stimulated luminescence ages in the probability analysis have also been developed and are illustrated using the database of Eastern Mediterranean dated fluvial deposits. There is considerable potential for meta-analysis research to inform long-term flood risk assessment, to evaluate short-term climate and land-use change impacts on flooding and river behaviour, and to test landscape evolution models.

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“…The single grain OSL ages presented so far were calculated assuming that the OSL signal had been completely reset before burial. However, a common source of overestimation in OSL ages lies in an insufficient exposure of sedimentary grains to sunlight during sediment transport (e.g., Roberts et al, 1999;Thomsen et al, 2007;Medialdea et al, 2014). This being said, it is well-know that the IRSL signals, and in particular the post-IR IRSL signals, reset much slower (more than an order of magnitude) than quartz OSL when sediments are exposed to sunlight (Godfrey-Smith et al, 1988;Buylaert et al, 2011;Murray et al, 2012).…”

Section: Which Chronology For the Roc De Marsal Sequence?mentioning

confidence: 99%

The complementarity of luminescence dating methods illustrated on the Mousterian sequence of the Roc de Marsal: A series of reindeer-dominated, Quina Mousterian layers dated to MIS 3

Guérin

Frouin

Tuquoi

et al. 2017

Quaternary International

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Located in southwest France, Roc de Marsal is a cave with a rich Mousterian stratigraphic sequence. The lower part of the sequence (Layers 9-5) are characterized by assemblages dominated by Levallois lithic technology associated with composite faunal spectra (including red deer, roe deer and reindeer) that shows a gradual increase in the frequency of reindeer. The top of the sequence (Layers 4-2) are characterised instead by Quina lithic technology (both in terms of technology and typology) with the faunal remains dominated by reindeer. Roc de Marsal thus provides a very interesting case study to place behavioural changes in a context of changing climates and environments in western Europe during the late Pleistocene. To link the occupations at Roc de Marsal with global and regional climatic conditions known independently, a robust chronology is needed. With this aim in mind, we applied three luminescence dating methods (TL, OSL and IRSL) on different minerals (flint, quartz and K-feldspar extracts). Here the results of two of these methods are presented in detail (TL and OSL) and compared with preliminary IRSL data. At Roc de Marsal, a comparison of methods was necessary to overcome a complex sedimentary history, with very heterogeneous dose rate distributions, both at the beta (mm) and gamma (dm) dose rate scales. The results indicate that the lower Levallois layers are dated to ~65-70 ka, while overlying Quina layers are dated to ~49 ka. These ages for the lower layers fit well with some models that place mixed faunal assemblages in the initial MIS 4; however, while the Quina ages overlap with several other Quina assemblages from the region, they place the reindeer dominated fauna well after the peak cold of MIS 4 and suggest a more extended and complex period of contemporaneous lithic techno-complexes than posited by some current models. AbstractLocated in southwest France, Roc de Marsal is a cave with a rich Mousterian stratigraphic sequence. The lower part of the sequence (Layers 9-5) are characterized by assemblages dominated by Levallois lithic technology associated with composite faunal spectra (including red deer, roe deer and reindeer) that shows a gradual increase in the frequency of reindeer. The top of the sequence (Layers 4-2) are characterised instead by Quina lithic technology (both in terms of technology and typology) with the faunal remains dominated by reindeer. Roc de Marsal thus provides a very interesting case study to place behavioural changes in a context of changing climates and environments in western Europe during the late Pleistocene. To link the occupations at Roc de Marsal with global and regional climatic conditions known independently, a robust chronology is needed. With this aim in mind, we applied three luminescence dating methods (TL, OSL and IRSL) on different minerals (flint, quartz and K-feldspar extracts). Here the results of two of these methods are presented in detail (TL and OSL) and compared with preliminary IRSL data. At Roc de Marsal, a comparison of metho...

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Reliability of equivalent-dose determination and age-models in the OSL dating of historical and modern palaeoflood sediments

Cited by 92 publications

References 49 publications

Luminescence Dating of Fluvial Deposits in the Rock Shelter of Cueva Antón, Spain

Luminescence Dating of Fluvial Deposits in the Rock Shelter of Cueva Antón, Spain

Meta-analysis of Holocene fluvial sedimentary archives: A methodological primer

The complementarity of luminescence dating methods illustrated on the Mousterian sequence of the Roc de Marsal: A series of reindeer-dominated, Quina Mousterian layers dated to MIS 3

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