The single-aliquot regenerative-dose (SAR) protocol applied to coarse-grain feldspar

Wallinga, Jakob; Murray, Andrew; Wintle, A.G.

doi:10.1016/s1350-4487(00)00091-3

Cited by 285 publications

(181 citation statements)

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“…However, a direct comparison between the natural and regenerative signals requires the sensitivity to be the same for the natural and regenerative signals, which is usually impossible as the sensitivity commonly varies after different laboratory treatments necessary for dating, such as laboratory dosing, preheating and stimulation (Stokes, 1994;Wintle and Murray, 1999;Blair et al, 2005). It is not until a single-aliquot regenerative-dose (SAR) protocol was proposed (Murray and Roberts, 1998;Galbraith et al, 1999;Murray and Wintle, 2000) that sensitivity changes caused by laboratory measurements for quartz OSL could be successfully allowed for. The SAR protocol was subsequently applied to the infrared stimulated luminescence (IRSL) dating of Kfeldspars (Wallinga et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…It is not until a single-aliquot regenerative-dose (SAR) protocol was proposed (Murray and Roberts, 1998;Galbraith et al, 1999;Murray and Wintle, 2000) that sensitivity changes caused by laboratory measurements for quartz OSL could be successfully allowed for. The SAR protocol was subsequently applied to the infrared stimulated luminescence (IRSL) dating of Kfeldspars (Wallinga et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Extending the age limit of luminescence dating using the dose-dependent sensitivity of MET-pIRIR signals from K-feldspar

Jacobs

Roberts

et al. 2013

Quaternary Geochronology

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S. (2013). Extending the age limit of luminescence dating using the dose-dependent sensitivity of MET-pIRIR signals from K-feldspar. Quaternary Geochronology, 17 55-67.Extending the age limit of luminescence dating using the dose-dependent sensitivity of MET-pIRIR signals from K-feldspar AbstractWe investigated the sensitivity change of multiple-elevated-temperature (MET) stimulated post-infrared infrared-stimulated luminescence (MET-pIRIR) signals as a response to irradiation, sunlight bleaching and heating using samples from the Mu Us Desert, central China. A strong dose dependence of MET-pIRIR signal sensitivity was observed. The intensity of the test-dose signals (Tx) increase with the pre-dose received. Furthermore, the signal sensitivity can be reset by sunlight bleaching or heating. This suggests that both the electron traps and hole centres in K-feldspar can be bleached by sunlight, and can, therefore, be used for dating. Using the test-dose signal as a monitor for sensitivity change, it was found that the sensitivity (or hole centres) saturate at a higher dose (D0 = ∼750 Gy) than the sensitivity-corrected signals (or electron traps) (D0 = ∼400 Gy). We propose a multi-aliquot regenerative-dose (MAR) MET-pIRIR dating protocol, which utilises the high saturation dose of hole centres. This protocol was tested using aeolian sediments from north China with ages ranging from 0 to 470 ka. It was found that, compared to the dose limit of ∼800-1000 Gy using the normal MET-pIRIR or pIRIR procedure, the new method can measure a natural dose of up to ∼1500 Gy and produce ages consistent with the expected ages for the samples investigated. increase with the pre-dose received. Furthermore, the signal sensitivity can be reset by sunlight bleaching or heating. This suggests that both the electron traps and hole centres in K-feldspar can be bleached by sunlight, and can, therefore, be used for dating. Using the test-dose signal as a monitor for sensitivity change, it was found that the sensitivity (or hole centres) saturate at a higher dose (D 0 = ~750 Gy) than the sensitivity-corrected signals (or electron traps) (D 0 = ~400 Gy). We propose a multi-aliquot regenerative-dose (MAR) MET-pIRIR dating protocol, which utilises the high saturation dose of hole centres. This protocol was tested using aeolian sediments from north China with ages ranging from 0 to 470 ka. It was found that, compared to the dose limit of ~800-1000 Gy using the normal MET-pIRIR or pIRIR procedure, the new method can measure a natural dose of up to ~1500 Gy and produce ages consistent with the expected ages for the samples investigated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extending the age limit of luminescence dating using the dose-dependent sensitivity of MET-pIRIR signals from K-feldspar

Jacobs

Roberts

et al. 2013

Quaternary Geochronology

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“…A recuperation level of ≤5% of the natural signal is acceptable (Wallinga et al, 2000). Recuperation values are presented in Table 4.…”

Section: Performance Testsmentioning

confidence: 99%

“…A recycling ratio value that is within 10% of unity (0.9-1.1; Wallinga et al, 2000) indicates that sensitivity changes which might occur during measurement were successfully corrected. Dose recovery and recycling ratios are presented in Table 4 and Fig.…”

Section: Performance Testsmentioning

confidence: 99%

Luminescence Dating of Fluvial Deposits from the Weser Valley, Germany

2015

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Abstract:Luminescence dating was applied on coarse-grained monomineralic potassium-rich feldspar and polymineralic fine-grained minerals of five samples derived from fluvial deposits of the River Weser in northwestern Germany. We used a pulsed infrared stimulated luminescence (IRSL) single aliquot regenerative (SAR) dose protocol with an IR stimulation at 50°C for 400 s (50 µs on-time and 200 µs off-time). In order to obtain a stable luminescence signal, only off-time IRSL signal was recorded. Performance tests gave solid results. Anomalous fading was intended to be reduced by using the pulsed IRSL signal measured at 50°C (IR 50 ), but fading correction was in most cases necessary due to moderate fading rates. Fading uncorrected and corrected pulsed IR 50 ages revealed two major fluvial aggradation phases during the Late Pleistocene, namely during marine isotope stage (MIS) 5d (100 ± 5 ka) and from late MIS 5b to MIS 4 (77 ± 6 ka to 68 ± 5 ka). The obtained luminescence ages are consistent with previous 230 Th/U dating results from underlying interglacial deposits of the same pit, which are correlated with MIS 7c to early MIS 6.

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“…The luminescence age of a sample is calculated by dividing the amount of ionizing radiation the sample absorbed during burial (measured as the equivalent dose, D e ) by the rate of energy absorption (the dose rate) from the environment. The single-aliquot regenerative dose (SAR) procedure is the standard approach to D e determination in quartz and feldspar Wallinga et al 2000;Auclair et al 2003;Buylaert et al 2012). Dose rate calculations are dependent on the spatial distribution of energy deposition rates by the various radiations (α, β, γ).…”

Section: Introductionmentioning

confidence: 99%

Luminescence, Rock Surfaces

Sohbati

2013

Encyclopedia of Scientific Dating Methods

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The single-aliquot regenerative-dose (SAR) protocol applied to coarse-grain feldspar

Cited by 285 publications

References 12 publications

Extending the age limit of luminescence dating using the dose-dependent sensitivity of MET-pIRIR signals from K-feldspar

Extending the age limit of luminescence dating using the dose-dependent sensitivity of MET-pIRIR signals from K-feldspar

Luminescence Dating of Fluvial Deposits from the Weser Valley, Germany

Luminescence, Rock Surfaces

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