Optical dating of Chinese loess using sand-sized quartz: Establishing a time frame for Late Pleistocene climate changes in the western part of the Chinese Loess Plateau

Buylaert, Jan‐Pieter; Murray, Andrew; Vandenberghe, Dimitri; Vriend, Mirjam; Corte, F. De; haute, Peter Van den

doi:10.1016/j.quageo.2007.05.003

Cited by 147 publications

(105 citation statements)

References 53 publications

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“…Both samples were taken from << 1 mm thick layer of dust. In this study we also make use of two old true loess samples to investigate the stability and preheat dependence of the (post-IR) IRSL signals (sections 3 and 6): sample A42 from the Luochuan section taken in loess layer L9 with an expected age of ~900 ka (Buylaert et al, 2007) and sample A7 from the Zhongjiacai section, dated with quartz OSL by Buylaert et al (2008) to 29.0±1.4 ka.…”

Section: Samples and Measurement Detailsmentioning

confidence: 99%

“…A Chinese loess sample (A7) with a quartz OSL age of 29.0±1.0 ka (Buylaert et al, 2008) is used to check whether low temperature preheats can be used for dating with the IRSL measured at 50°C. In this age range quartz OSL dating provides suitable age control (the quartz D e is 92±2 Gy).…”

Section: Can We Use a Low Temperature Pre-heat To Date Loess Using Irmentioning

confidence: 99%

“…However, more samples, with independent age control are needed before we can confidently state that this dating Buylaert et al (2008). The g-values were normalised to a measurement delay time of 2 days after irradiation (i.e.…”

Section: Can We Use a Low Temperature Pre-heat To Date Loess Using Irmentioning

confidence: 99%

“…Many studies of Chinese loess have employed quartz optically stimulated luminescence (OSL) to establish a chronology both using coarse (e.g. Stevens et al, 2006;Buylaert et al, 2008;Lai, 2010) and fine (e.g. Watanuki et al, 2003;Lu et al, 2007) grains.…”

Section: Introductionmentioning

confidence: 99%

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IRSL and post-IR IRSL residual doses recorded in modern dust samples from the Chinese Loess Plateau

et al. 2011

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Using a set of modern/young (0 to about 200 years old) dust samples collected from the Chinese Loess Plateau the bleachability of IRSL measured at 50°C (IR 50 ) and post-IR 50 elevated temperature IRSL (measured at 225°C and at 290°C) is investigated by measuring the apparent (residual) doses recorded by these signals. Doses recorded by quartz OSL are used as a reference. Allowing for differences in dose rates it seems that both IRSL and post-IR IRSL signals yield residual doses that are significantly larger than the doses measured in quartz. These residual doses can be largely explained by thermal transfer caused by preheating. Nevertheless, we advise against the use of a low temperature preheat (<200°C) with IR 50 to date loess samples because, as has been reported before, the signal appears to be thermally unstable. In general, we conclude that it may not be advisable to apply post-IR IRSL dating to Chinese loess samples where residuals of up to ~20 Gy are a significant fraction of the total dose. However, these residuals quickly become unimportant when dating older samples, and this is the age range in which post-IR IRSL dating is likely to be most useful.

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Section: Samples and Measurement Detailsmentioning

confidence: 99%

Section: Can We Use a Low Temperature Pre-heat To Date Loess Using Irmentioning

confidence: 99%

Section: Can We Use a Low Temperature Pre-heat To Date Loess Using Irmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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IRSL and post-IR IRSL residual doses recorded in modern dust samples from the Chinese Loess Plateau

et al. 2011

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“…Using quartz grains of 45e63 mm Lai (2010) reported underestimation for Luochuan loess in China for ages higher than about 70 ka. Using 63e90 mm quartz, Buylaert et al (2008) suggested that one should be careful when dating Chinese loess samples with SAR on sand-sized quartz for which the D e values exceed 120 Gy (~40 ka).…”

Section: Introductionmentioning

confidence: 99%

On the importance of grain size in luminescence dating using quartz

Timar-Gabor

Buylaert

Guralnik

et al. 2017

Radiation Measurements

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h i g h l i g h t sDiscrepancy between quartz SAR-OSL ages obtained on fine and coarse grains. Dose response curve adequately fitted by a sum of two saturating exponentials. Isothermal decay fitted by a single exponential. Clear dependency between the saturation characteristics (D 0 s) and the quartz grain size. No correlation between the 2 D 0 value and the maximum attainable accurate equivalent dose. a r t i c l e i n f o a b s t r a c tThere are two major problems commonly encountered when applying Optically Stimulated Luminescence (OSL) dating in the high dose range: (i) age discrepancy between different grain sizes, and (ii) age underestimation. A marked and systematic discrepancy between fine-grain (4e11 mm) and coarse-grain (63e90 mm) quartz single aliquot regeneration protocol (SAR) ages has been reported previously for Romanian and Serbian loess >40 ka (D e of~100 Gy), generally with fine-grain ages underestimating the depositional age. In this paper, we show a similar age pattern for two grain size fractions from Chinese loess, thus pointing to a potential worldwide phenomenon. While age underestimation is often attributed to signal saturation problems, this is not the case for fine grain material, which saturates at higher doses than coarse grains, yet begins to underestimate true ages earlier. Here we examine the dose response curves of quartz from different sedimentary contexts around the world, using a range of grain sizes (diameters of 4e11 mm, 11e30 mm, 35e50 mm, 63e90 mm, 90e125 mm, 125e180 mm, and 180 e250 mm). All dose response curves can be adequately described by a sum of two saturating exponential functions, whose saturation characteristics (D 0 values) are clearly anticorrelated with grain diameter (4) through an inverse square root relationship, D 0 ¼ A/√4, where A is a scaling factor. While the mechanism behind this grain-size dependency of saturation characteristics still needs to be understood, our results show that the observation of an extended SAR laboratory dose response curve does not necessarily enable high doses to be recorded accurately, or provide a corresponding extended age range.

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Aeolian process and climatic changes in loess records from the northeastern Tibetan Plateau: Response to global temperature forcing since 30 ka

Vandenberghe

et al. 2015

Paleoceanography

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The response of surface processes to global climatic changes since the last glacial is critical to understanding the mechanism of climatic changes on the Tibetan Plateau. In this study, loess from the northeastern Tibetan Plateau (NETP) was closely spaced dated to provide an independent high-resolution record of dust accumulation processes and millennial-scale climatic changes. Optically stimulated luminescence ages reveal episodes of rapid dust deposition at approximately 12.3 ka, 16 ka, 21-23 ka, 25-28 ka, and possibly also at 30-33 ka. These episodes are broadly correlated with high-latitude and marine records cold climatic events, such as the Younger Dryas, Heinrich event 1, and the Last Glacial Maximum. This correlation implies that dust storms in the NETP represent episodic aridification and wind strengthening, which is ascribed to the southward shift of the polar front and the intensification of the Siberian high-pressure cell that was forced by millennial-scale cooling in high northern latitudes.

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Optical dating of Chinese loess using sand-sized quartz: Establishing a time frame for Late Pleistocene climate changes in the western part of the Chinese Loess Plateau

Cited by 147 publications

References 53 publications

IRSL and post-IR IRSL residual doses recorded in modern dust samples from the Chinese Loess Plateau

IRSL and post-IR IRSL residual doses recorded in modern dust samples from the Chinese Loess Plateau

On the importance of grain size in luminescence dating using quartz

Aeolian process and climatic changes in loess records from the northeastern Tibetan Plateau: Response to global temperature forcing since 30 ka

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