Assessing the reproducibility and accuracy of optical dating of fluvial deposits

Rodnight, Helena; Duller, G.A.T.; Wintle, A.G.; Tooth, Stephen

doi:10.1016/j.quageo.2006.05.017

Cited by 132 publications

(92 citation statements)

References 29 publications

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“…The OSL scanning procedure can also be used more generally to determine the number of bright grains in small aliquots where resolution of components in the D e distribution is of interest, where a single aliquot procedure is preferred (Rodnight et al, 2006;Reimann et al, 2012), and also to avoid problems arising from multiple grain occupancy of grain holes in a Risø single grain reader sample disc (Arnold et al, 2012). While the spatial variation in the beta dose rate did not appear to be a potential source of significant overdispersion in the equivalent dose for the West Cliffe samples, a better understanding of its extent on a submillimetre scale is required and this is likely to involve a combination of experimental dosimetry technique of the type discussed in this paper and further developments of autoradiographic techniques (Rufer and Preusser, 2009).…”

Section: Resultsmentioning

confidence: 99%

Luminescence dating of sediments from a Palaeolithic site associated with a solution feature on the North Downs of Kent, UK

Bailiff

Lewis

Drinkall

et al. 2013

Quaternary Geochronology

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White, M. (2013) 'Luminescence dating of sediments from a Palaeolithic site associated with a solution feature on the North Downs of Kent, UK.', Quaternary geochronology., 18 . pp. 135-148. Further information on publisher's website:http://dx.doi.org/10.1016/j.quageo.2013.04.001Publisher's copyright statement: NOTICE: this is the author's version of a work that has been accepted for publication in Quaternary geochronology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be re ected in this document. Changes may have been made to this work since it was submitted for publication. A de nitive version has been published in Quaternary geochronology, 18, 2013Quaternary geochronology, 18, , 10.1016Quaternary geochronology, 18, /j.quageo.2013 Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

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Section: Resultsmentioning

confidence: 99%

Luminescence dating of sediments from a Palaeolithic site associated with a solution feature on the North Downs of Kent, UK

Bailiff

Lewis

Drinkall

et al. 2013

Quaternary Geochronology

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“…For these cases statistical modeling is required to determine the true burial age (e.g., Olley et al, 1998;Murray and Olley, 2002;Rodnight et al, 2006;Bailey and Arnold, 2006;Arnold et al, 2007). A widely used statistical approach to exclude incompletely bleached grains is the minimum age model (MAM) Galbraith et al (1999).…”

Section: Paleodose Estimationmentioning

confidence: 99%

Rates of river incision across the main tectonic units of the Pamir identified using optically stimulated luminescence dating of fluvial terraces

et al. 2014

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Calculated incision rates along the Panj, the main river of the Pamir, are used to investigate any influence by tectonics or climate on the architecture of the river. The depositional ages of Panj river terraces were calculated using optically stimulated luminescence (OSL) dating of terrace sand. Fluvial incision rates were generated by integrating the terrace depositional ages with accurate kinematic GPS measurements of terrace heights above the modern Panj. We investigated 16 terraces along the Panj at the western Pamir margin and one terrace from the Vakhsh River to the north of the Pamir. The results reveal brief periods of fluvial deposition over the past 26 kyr. The oldest Panj terrace depositional ages coincide with early MIS 2 and MIS 2/1 glaciations on the Pamir Plateau. Younger terrace ages have no apparent link with glacial cycles. Terraces with varying heights above the modern Panj at different localities yielded similar depositional ages. This suggests that local conditions have determined fluvial incision rates. Combining all of the terrace measurements, the average incision rate of the Panj over the last 26 kyr has been ∼5.6 mm/yr. A high mean incision rate of ∼7.3 mm/yr was calculated from terraces where the Panj has cut a steep-sided valley through the Shakhdara Dome. Significantly lower incision rates (∼2 -3 mm/yr) were calculated from terraces where the Panj flows along the southern boundaries of the Shakhdara and Yazgulom domes. At those localities, graded segments of the Panj river profile and increased valley widths are indicative of local base levels. Downstream of the Yazgulom Dome, river incision rates are generally lower (∼4 -5 mm/yr) than the Panj average. However, there is one exception where higher incision rates (∼6 mm/yr) were calculated upstream of the Darvaz Fault Zone, a major tectonic feature that forms the western boundary of the Pamir. The Vakhsh river terrace to the north of the Pamir yielded a lower incision rate (∼3 mm/yr) compared to the Panj average. Variation in incision rates along the Panj does not correspond to changes in rock type or river catchment area. Instead, incision rates appear to have been primarily influenced by river capture across the southern and central metamorphic domes of the Pamir. Wherever the Panj cuts these domes it displays a convex river profile. The combination of localized river profile convexity and changes in incision rates across the Pamir domes indicates that the dome boundaries have been active recently.

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“…Firstly, a large number of aliquots are needed to generate a representative equivalent dose distribution from fluvial sediments (Rodnight et al, 2006), but this is hard to achieve for older samples which take a long time to measure. This was mitigated in part in this study by the use of small aliquots (which increases the detection of scatter) and the inclusion of all aliquots within two standard deviations of the mean in the final age determination.…”

Section: Resultsmentioning

confidence: 99%

“…The final D e is a mean of 6 aliquots (Table 6), except for CG05-03 (X2461), where 5 aliquots were used because of an extreme outlier (Figure 3k). It should be noted that since these dates were undertaken, Rodnight et al (2006) have stated that a minimum of 50 aliquots should be undertaken from fluvial OSL samples to ensure a representative sample. The ages presented in this paper should therefore be regarded as initial OSL age estimates only.…”

Section: Optically-stimulated Luminescence (Osl) Datingmentioning

confidence: 99%

“…Despite the seemingly good behaviour of the SAR protocol on these samples, the age estimates discussed below should be considered as initial age estimates only because of the limited number of aliquots used (6) compared with the 50 recently recommended by Rodnight et al (2006). An approach used here that might mitigate this problem somewhat is that small aliquots were measured, in line with the recommendations of Olley et al (1999) for potentially partially-bleached sediments.…”

Section: Osl Datesmentioning

confidence: 99%

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Integrated chronological control on an archaeologically significant Pleistocene river terrace sequence: the Thames-Medway, eastern Essex, England

Briant

Kilfeather

Parfitt

et al. 2012

Proceedings of the Geologists' Association

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Assessing the reproducibility and accuracy of optical dating of fluvial deposits

Cited by 132 publications

References 29 publications

Luminescence dating of sediments from a Palaeolithic site associated with a solution feature on the North Downs of Kent, UK

Luminescence dating of sediments from a Palaeolithic site associated with a solution feature on the North Downs of Kent, UK

Rates of river incision across the main tectonic units of the Pamir identified using optically stimulated luminescence dating of fluvial terraces

Integrated chronological control on an archaeologically significant Pleistocene river terrace sequence: the Thames-Medway, eastern Essex, England

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