A modified SAR protocol for optical dating of individual grains from young quartz samples

Ballarini, Mirko; Wallinga, Jakob; Wintle, A.G.; Bos, A.J.J.

doi:10.1016/j.radmeas.2006.12.016

Cited by 166 publications

(84 citation statements)

References 33 publications

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“…Moving the background interval closer to the initial signal is more effective in reducing the contribution from slower components (see e.g. Ballarini et al, 2007), but we observed no dependence of the results on the interval chosen for background evaluation. Unless indicated otherwise, natural and regenerated signals were measured after a preheat of 10 s at 220°C; the response to the test dose (17.3 Gy) was measured after a cutheat to 180°C.…”

Section: Sample Preparation and Analytical Facilitiesmentioning

confidence: 67%

A high resolution optical dating study of the Mostiştea loess-palaeosol sequence (SE Romania) using sand-sized quartz

Vasiliniuc¹,

Timar-Gabor

Vandenberghe

et al. 2011

Geochronometria

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Abstract:We report on SAR-OSL dating of closely-spaced samples from the loess-palaeosol sequence near Mostiştea lake (Danube Plain, SE Romania). We used sand-sized quartz and a SAR protocol that involved a preheat of 10s at 220°C and a test dose cutheat to 180°C. It is shown that these thermal pretreatments isolate a quartz OSL signal that is dominated by the fast component. The behaviour of this signal in the SAR protocol is then documented. The ratio of the measured to given dose tends to lie slightly but systematically above unity (~5% on average) and the recycling ratio below unity (~6% on average); for all samples, the recuperated signal is negligible. Within analytical uncertainty, the nineteen optical ages are internally consistent and agree with the predictions from a palaeomagnetic age-depth model. Although it may be possible to optimize the SAR measurement procedure, the optical ages already confirm the chronostratigraphic position of the uppermost welldeveloped palaeosol in that it formed during MIS 5.The established chronology allows correlating the sequence near Mostiştea lake with that near Mircea Vodă that we investigated earlier.

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Section: Sample Preparation and Analytical Facilitiesmentioning

confidence: 67%

A high resolution optical dating study of the Mostiştea loess-palaeosol sequence (SE Romania) using sand-sized quartz

Vasiliniuc¹,

Timar-Gabor

Vandenberghe

et al. 2011

Geochronometria

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“…First, the fine-grain signals do show a greater proportion of the medium component to the initial (natural) signal. To decrease the consequences of this different proportion, it can be advisable to use an early background (EBG) subtraction for the finegrain samples (Ballarini et al, 2007;Cunningham and Wallinga, 2010). To test the effect of an EBG subtraction, we calculated fine grain ages using an initial signal of the first second subtracted by a background of the signal between 2 and 5 seconds.…”

Section: Discussion Of Osl Resultsmentioning

confidence: 99%

Dating desert pavements – First results from a challenging environmental archive

Fuchs

Dietze

Al-Qudah

et al. 2015

Quaternary Geochronology

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Desert pavements are widespread landforms of arid environments. They consist of a monolayer of clasts at the surface, associated with an underlying unit of eolian fines. In some situations, buried desert pavements can be observed, which is interpreted as a change in the environmental conditions. Therefore, it is believed that desert pavements represent important paleoenvironmental sediment archives, especially for arid environments, where natural archives of past environments are rare. To better understand the formation process of desert pavements and to enable the paleoenvironmental interpretation of these valuable sediment archives, reliable chronologies are of crucial importance. Thus, OSL dating was applied to samples from well-developed desert pavements in two different study areas, the Cima Volcanic Field, eastern Mojave Desert, USA, and the desert of northeastern Badia, Jordan.To test the suitability of the sediments for OSL dating, the luminescence characteristics of the fine-and coarse-grain quartz fraction are described and compared. Finally, first OSL ages are presented.2

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“…The standard SAR protocol was applied on three samples, using blue stimulation for 50 s at 125 • C, a pre-heat of 240 • C and a cut heat of 220 • C. Equivalent dose (D e ) values were determined using the first 0.6 s of the OSL decay curve, and subtracting the background of the last 5 s. Another approach using the early background (EBG) subtraction method (Ballarini et al, 2007) with an integral of 0-0.4 s for OSL-signal determination and a background integral of 1.0-1.4 s, as described by Lowick and Preusser (2011), did not improve the dataset and was therefore rejected. The EBG subtraction did not change D e -values compared to those using a late background (LBG) subtraction but only reduced the signal intensity and increased uncertainties.…”

Section: Sar-osl On Fine Grain Quartzmentioning

confidence: 99%

Potential and limits of OSL, TT-OSL, IRSL and pIRIR<sub>290</sub> dating methods applied on a Middle Pleistocene sediment record of Lake El'gygytgyn, Russia

Zander

Hilgers

2013

Clim. Past

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Abstract. This study tests the paleomagnetic and proxy-data based Mid- to Upper Pleistocene sediment deposition history of Lake El'gygytgyn by applying different approaches of luminescence dating techniques on sediment cores taken from the centre of the 175 m deep lake. For dating polymineral and quartz fine grains (4–11 μm grain size range) were extracted from nine different levels from the upper 28 m of sediment cores 5011-1A and 5011-1B. According to the independent age model, the lowest sample from 27.8–27.9 m below lake bottom level correlates to the Brunhes-Matuyama (B/M) reversal. Polymineral sub-samples were analysed by infra-red stimulated luminescence (IRSL) and post-IR IRSL measured at 290 °C (pIRIR290) using single aliquot regenerative dose (SAR) sequences. SAR protocols were further applied to measure the blue light optically stimulated luminescence (OSL) and thermally-transferred OSL (TT-OSL) of fine-grained quartz supplemented by a multiple aliquot approach. Neither low temperature IRSL measurements at 50 °C nor any OSL dating approach on quartz yielded reliable results. Deconvolution of their dose response curves revealed a pseudo-increase of the dose response curves and explains the observed underestimation. The pIRIR protocol applied to polymineral fine grains was the only luminescence technique able to provide dating results of acceptable accuracy up to ca. 700 ka when correlated to the existing proxy-data and paleomagnetic based age record. We present the potential and limits of the different dating techniques and a correlation of pIRIR290 results with the proxy-data based age model.

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A modified SAR protocol for optical dating of individual grains from young quartz samples

Cited by 166 publications

References 33 publications

A high resolution optical dating study of the Mostiştea loess-palaeosol sequence (SE Romania) using sand-sized quartz

A high resolution optical dating study of the Mostiştea loess-palaeosol sequence (SE Romania) using sand-sized quartz

Dating desert pavements – First results from a challenging environmental archive

Potential and limits of OSL, TT-OSL, IRSL and pIRIR<sub>290</sub> dating methods applied on a Middle Pleistocene sediment record of Lake El'gygytgyn, Russia

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A modified SAR protocol for optical dating of individual grains from young quartz samples

Cited by 166 publications

References 33 publications

A high resolution optical dating study of the Mostiştea loess-palaeosol sequence (SE Romania) using sand-sized quartz

A high resolution optical dating study of the Mostiştea loess-palaeosol sequence (SE Romania) using sand-sized quartz

Dating desert pavements – First results from a challenging environmental archive

Potential and limits of OSL, TT-OSL, IRSL and pIRIR&lt;sub&gt;290&lt;/sub&gt; dating methods applied on a Middle Pleistocene sediment record of Lake El'gygytgyn, Russia

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Potential and limits of OSL, TT-OSL, IRSL and pIRIR<sub>290</sub> dating methods applied on a Middle Pleistocene sediment record of Lake El'gygytgyn, Russia