Luminescence dating of glaciolacustrine silt in overdeepened basin fills beyond the last interglacial

Buechi, Marius W.; Lowick, Sally E.; Anselmetti, Flavio S.

doi:10.1016/j.quageo.2016.09.009

Cited by 24 publications

(33 citation statements)

References 72 publications

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“…The reliability of the De values obtained in the high-dose region of dose-response curves has been debated [69][70][71][72][73][74]. For practical purposes, the 2D0 value (characteristic saturation dose) of a dose response curve fitted with a single saturating exponential function is usually used as a criterion to evaluate the upper limit for precise age determination [40,74]. However, the D0 value has been found to be varied with the size of the maximum regeneration dose [74].…”

Section: Reliability Of Osl Agesmentioning

confidence: 99%

“…For practical purposes, the 2D0 value (characteristic saturation dose) of a dose response curve fitted with a single saturating exponential function is usually used as a criterion to evaluate the upper limit for precise age determination [40,74]. However, the D0 value has been found to be varied with the size of the maximum regeneration dose [74]. This is also the case for D01 and D02, when a double-saturating exponential function is applied [75].…”

Section: Reliability Of Osl Agesmentioning

confidence: 99%

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Determining the Age of Terrace Formation Using Luminescence Dating—A Case of the Yellow River Terraces in the Baode Area, China

Zhang

Qiu

et al. 2020

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Dating fluvial terraces has long been a challenge for geologists and geomorphologists, because terrace straths and treads are not usually directly dated. In this study, the formation ages of the Yellow River terraces in the Baode area in China were determined by dating fluvial deposits overlying bedrock straths using optically stimulated luminescence (OSL) dating techniques. Seven terraces (from the lowest terrace T1 to the highest terrace T7) in the study area were recognized, and they are characterized by thick fluvial terrace deposits overlaid by loess sediments. Twenty-five samples from nine terrace sections were dated to about 2–200 ka. The OSL ages (120–190 ka) of the fluvial samples from higher terraces (T3–T6) seem to be reliable based on their luminescence properties and stratigraphic consistency, but the geomorphologic and stratigraphic evidence show that these ages should be underestimated, because they are generally similar to those of the samples from the lower terrace (T2). The formation ages of the terrace straths and treads for the T1 terrace were deduced to be about 44 ka and 36 ka, respectively, based on the deposition rates of the fluvial terrace deposits, and the T2 terrace has the same strath and tread formation age of about 135 ka. The incision rate was calculated to be about 0.35 mm/ka for the past 135 ka, and the uplift rate pattern suggests that the Ordos Plateau behaves as a rigid block. Based on our previous investigations on the Yellow River terraces and the results in this study, we consider that the formation ages of terrace straths and treads calculated using deposition rates of terrace fluvial sediments can overcome problems associated with age underestimation or overestimation of strath or fill terraces based on the single age of one fluvial terrace sample. The implication is that, for accurate dating of terrace formation, terrace sections should be systematically sampled and dated.

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Section: Reliability Of Osl Agesmentioning

confidence: 99%

Section: Reliability Of Osl Agesmentioning

confidence: 99%

Determining the Age of Terrace Formation Using Luminescence Dating—A Case of the Yellow River Terraces in the Baode Area, China

Zhang

Qiu

et al. 2020

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“…However, it was pointed out that the dose response curve needs to be constructed up to saturation of both components for meaningful values of the saturation parameters to be calculated (Timar-Gabor and Wintle, 2013;Timar-Gabor et al, 2017). In a recent study on samples from a drill core in Switzerland (Buechi et al, 2017) it was shown that when a single saturating function is used to describe the dose response of a fine quartz sample, the D 0 fitting parameters vary with the size of the maximum regeneration dose; it was also pointed out that the single saturating exponential fit was not the most appropriate in this case and that use of such a fit may account for the dependence observed between the D 0 value and the size of the maximum given dose. Thus, a dose response curve for 4-11 μm grains from sample M#6# was constructed using 18 doses up to 6 kGy ( Fig.…”

Section: Laboratory Dose-response Curves For High Dosesmentioning

confidence: 99%

Assessing the maximum limit of SAR-OSL dating using quartz of different grain sizes

et al. 2018

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SAR-OSL dating studies of Romanian, Serbian and Chinese loess using fine and coarse quartz have previously resulted in a series of controversial issues. We extend here the investigations using fine (4–11 μm) and different coarse quartz (>63 μm) grains extracted from aeolianites from a site on Eivissa Island (southwestern Mediterranean). Aeolianites were chosen since they contain quartz from a different geological context and have significantly lower environmental dose rates. The dose response curves of the OSL signals for fine and coarse quartz are similar to those for loess and are also represented by the sum of two saturating exponential functions. For doses up to ~200 Gy, the dose response curves of fine and coarse grains from aeolianites can be superimposed and the ages obtained for the different grain sizes are in agreement up to ~250 ka, increasing our confidence in the accuracy of the ages obtained for samples with such doses, irrespective of the magnitude of the environmental dose rate. Particularly for the fine quartz fraction, a mismatch between the SAR dose response curve and the dose response curve obtained when doses are added to the natural is reported, indicating that the application of the SAR protocol in the high dose range is problematic. This dose dependent deviation is much less pronounced for coarse grains. Thus, it seems reasonable to infer that the dose response curves for the coarse grains, although saturating earlier can be regarded as more reliable for equivalent dose calculation than those for the fine grains.

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“…A set of 8 small aliquots (2 mm) per sample was first used for D e determination and then given a dose of ~100 Gy, followed by a preheat of 250°C for 10 s (as for D e determination). Similar to the approach of Buechi et al (2017), the aliquot was then held for various times, between 0 and 5000 s, at elevated temperatures of between 220…”

Section: Signal Stability Of Small Aliquot Signalsmentioning

confidence: 99%

Testing the suitability of dim sedimentary quartz from northern Switzerland for OSL burial dose estimation

et al. 2017

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We investigate the suitability of sedimentary quartz associated with former glacial advances in northern Switzerland to provide reliable burial dose estimates using Optically Stimulated Luminescence (OSL). Previous studies on northern alpine quartz show that its signal characteristics can be poor and potentially problematic. We analyse quartz signals of small aliquots, which reveal the presence of a prominent medium or slow component in the initial part of some signals. Nonetheless, rejection of aliquots with unfavourable signal composition does not alter the burial dose estimates, but significantly reduces the data set for De determination. Signal lifetimes from isothermal decay measurements cover a wide range of values, yet the lowest lifetimes are high enough to guarantee a reliable burial dose estimate for samples of < 400 ka. Comparison of small aliquot and single grain burial dose distributions reveals that signal averaging masks partial bleaching in some of the samples. We therefore strongly recommend single grain measurements for samples from this setting and area, in order to exclude age overestimation due to partial bleaching.

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Luminescence dating of glaciolacustrine silt in overdeepened basin fills beyond the last interglacial

Cited by 24 publications

References 72 publications

Determining the Age of Terrace Formation Using Luminescence Dating—A Case of the Yellow River Terraces in the Baode Area, China

Determining the Age of Terrace Formation Using Luminescence Dating—A Case of the Yellow River Terraces in the Baode Area, China

Assessing the maximum limit of SAR-OSL dating using quartz of different grain sizes

Testing the suitability of dim sedimentary quartz from northern Switzerland for OSL burial dose estimation

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