Natural and laboratory TT-OSL dose response curves: Testing the lifetime of the TT-OSL signal in nature

Chapot, Melissa S.; Roberts, Helen M.; Duller, G.A.T.; Lai, Zhongping

doi:10.1016/j.radmeas.2015.11.008

Cited by 29 publications

(20 citation statements)

References 26 publications

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“…Several modifications of the protocol have been tested on 20-41 µm quartz grains from a single sample by Hernandez et al (2012); they concluded that only samples that did not show significant changes between the first and subsequent cycles and/or did not need high temperature treatment at the end of each cycle were suitable for TT-OSL dating. Chapot et al (2016) applied a slightly different TT-OSL protocol to 4-11 µm quartz grains from a sedimentary sequence with an independent time scale reaching back 1 million years.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

“…A similar approach had been applied to the testing of OSL signals (Chapot et al, 2012). Chapot et al (2016) concluded that the source trap for the TT-OSL had insufficient thermal stability for dating beyond 50 ka, having a lifetime at 10°C of ~174 ka. However, in a study of single sand-sized grains of quartz from Atapuerca, Spain, Arnold et al (2015) used a similar protocol to that of Chapot et al (2016) and obtained ages between ~240 and ~930 ka that were in agreement with the independent chronology.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

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Optically stimulated luminescence signals from quartz: A review

Wintle

Adamiec

2017

Radiation Measurements

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Optically stimulated luminescence (OSL) was first observed from natural quartz 30 years ago. Since it increases with exposure to radiation, OSL has been developed as a dating tool for sediments. Most commonly, the OSL signal is observed using optical filters that pass wavelengths centred on 340 nm during optical stimulation at 470 nm. Experimental evidence behind the choice of measurement conditions for dating is presented, for example, information on the emission spectra. Different methods of optical stimulation are reviewed, including non-linear application of stimulation power; these are related to isolation of the fast OSL component that is most appropriate for dating sediments. Practical methods for fast OSL component separation are mentioned. Information on the stimulation process has been obtained by varying the wavelength during measurement and by varying the stimulation temperature. On the other hand, information on the recombination process is provided by observing the OSL emitted when the stimulation source is pulsed; this has practical applications when feldspar contamination is expected. Although laboratory experiments imply more than adequate thermal stability of the fast OSL signal for dating back to a million years, ages determined in the laboratory using the single aliquot regenerative dose procedure do not agree with independent ages. To address this problem, luminescence signals derived from the same electron trap, as well as those resulting from stimulation in the infrared (875 nm) and in the violet (405 nm), have been investigated as potential dating tools.

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Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Optically stimulated luminescence signals from quartz: A review

Wintle

Adamiec

2017

Radiation Measurements

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“…One explanation could be that they reach natural saturation at the same dose. To explore this option, we examined the natural saturations of these three signals at the Luochuan loess section in China, where natural DRCs were constructed (Chapot et al, 2016;Ankjaergaard et al, 2016;Li et al, 2018). There, natural DRCs suggest field saturation at about 2000 Gy for both TT-OSL and VSL.…”

Section: Natural Saturation Profilesmentioning

confidence: 99%

“…Nevertheless, a more comprehensive investigation revealed different limitations of using these signals. For example, the TT-OSL signal is thermally unstable, producing therefore only minimum ages after a few hundred thousand years (Adamiec et al, 2010;Shen et al, 2011;Chapot et al, 2016;Faershtein et al, 2018); it appears that the natural growth of the VSL signal cannot be properly described with the single aliquot regenerative (SAR; Murray and Wintle, 2000) constructed dose response curve (DRC) generally used for De determination (Ankjaergaard et al, 2016;Ankjaergaard, 2019). There is evidence of age overestimation for the pIRIR 290 and athermal signal loss (termed anomalous fading) issues for the pIRIR signals measured at lower temperatures (Lowick et al, 2012;Tsukamoto et al, 2017).…”

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confidence: 99%

Extended-range luminescence dating of quartz and alkali feldspar from aeolian sediments in the eastern Mediterranean

2020

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Abstract. Optically stimulated luminescence (OSL) of quartz is an established technique for dating late Pleistocene to late Holocene sediments. Unfortunately, this method is often limited to up to 100 ka (thousands of years). Recent developments in new extended-range luminescence techniques show great potential for dating older sediments of middle and even early Pleistocene age. These methods include thermally transferred OSL (TT-OSL) and violet stimulated luminescence (VSL) for quartz and post-infrared infrared stimulated luminescence (pIRIR) for feldspar. Here we investigate the luminescence behaviour of the TT-OSL, VSL, and pIRIR signals of quartz and feldspar minerals of aeolian sediments of Nilotic origin from the eastern Mediterranean. We sampled a 15 m thick sequence (Kerem Shalom) comprising sandy calcic palaeosols, which is part of a sand sheet that covers an extensive region in south-western Israel. Dose recovery and bleaching experiments under natural conditions indicated that the pIRIR250 signal is the most suitable for dating the Nilotic feldspar. Luminescence intensity profiles revealed natural saturation of the three signals at the same depth of ∼6 m, indicating that ages of samples below that depth are minimum ages. Using TT-OSL and pIRIR250, a minimum age of 715 ka for the base of the section was obtained, suggesting aeolian sand accumulation along the eastern Mediterranean coastal plain already since the early Pleistocene. Our results indicate that both TT-OSL and pIRIR250 can accurately date aeolian sediments of Nilotic origin up to 200 ka and that minimum ages can be provided for older samples up to the early Pleistocene.

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“…One explanation could be that they reach natural saturation at the same dose. To explore this option, we examine the natural saturations of these three signals at the Luochuan loess section in China, where natural DRCs were constructed (Chapot et al, 2016;Ankjaergaard et al, 2016, Li et al, 2018. There, natural DRCs suggest field saturation at about 2000 Gy for both TT-OSL and VSL.…”

Section: Natural Saturation Profilesmentioning

confidence: 99%

Extended range luminescence dating of quartz and alkali-feldspar from aeolian sediments in the eastern Mediterranean

Faershtein¹,

Porat²,

Matmon³

2020

Preprint

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<p><strong>Abstract.</strong> Optically stimulated luminescence (OSL) on quartz is an established technique for dating late Pleistocene to late Holocene sediments. Unfortunately, this method is often limited to up to 100&#8201;ka (thousands of years). Recent developments in new extended range luminescence techniques show great potential for dating older sediments of middle and even early Pleistocene age. These methods include thermally transferred OSL (TT-OSL) and violet stimulated luminescence (VSL) for quartz and post infrared-infrared stimulated luminescence (pIRIR) for feldspar. Here we investigate the luminescence behavior of the TT-OSL, VSL and pIRIR signals of quartz and feldspar minerals of aeolian sediments of Nilotic origin from the eastern Mediterranean. We sampled a 15&#8201;m thick sequence (Kerem Shalom) comprising sandy calcic paleosols, which is part of a sand sheet that covers an extensive region in south-western Israel. Dose recovery and bleaching experiments under natural conditions indicated that the pIRIR250 signal is the most suitable for dating the Nilotic feldspar. Luminescence intensity profiles revealed natural saturation of the three signals at the same depth of ~6&#8201;m, indicating that ages of samples below that depth are minimum ages. Using TT-OSL and pIRIR250, a minimum age of 715&#8201;ka, for the base of the section was obtained, suggesting aeolian sand accumulation along the eastern Mediterranean coastal plain already since the early Pleistocene. Our results indicate that both TT-OSL and pIRIR250 can accurately date middle Pleistocene aeolian sediments of Nilotic origin and that minimum ages can be provided for early Pleistocene samples.</p>

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Natural and laboratory TT-OSL dose response curves: Testing the lifetime of the TT-OSL signal in nature

Cited by 29 publications

References 26 publications

Optically stimulated luminescence signals from quartz: A review

Optically stimulated luminescence signals from quartz: A review

Extended-range luminescence dating of quartz and alkali feldspar from aeolian sediments in the eastern Mediterranean

Extended range luminescence dating of quartz and alkali-feldspar from aeolian sediments in the eastern Mediterranean

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