On the importance of grain size in luminescence dating using quartz

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On the importance of grain size in luminescence dating using quartz. / Timar-Gabor, A.; Buylaert, J. P.; Guralnik, B.; Trandafir-Antohi, O.; Constantin, D.; Anechitei-Deacu, V.; Jain, M.; Murray, A. S.; Porat, N.; Hao, Q.; Wintle, A. G.

In: Radiation Measurements, Vol. 106, 01.11.2017, p. 464-471.

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Harvard

Timar-Gabor, A, Buylaert, JP, Guralnik, B, Trandafir-Antohi, O, Constantin, D, Anechitei-Deacu, V, Jain, M, Murray, AS, Porat, N, Hao, Q & Wintle, AG 2017, 'On the importance of grain size in luminescence dating using quartz', Radiation Measurements, vol. 106, pp. 464-471. https://doi.org/10.1016/j.radmeas.2017.01.009

APA

Timar-Gabor, A., Buylaert, J. P., Guralnik, B., Trandafir-Antohi, O., Constantin, D., Anechitei-Deacu, V., Jain, M., Murray, A. S., Porat, N., Hao, Q., & Wintle, A. G. (2017). On the importance of grain size in luminescence dating using quartz. Radiation Measurements, 106, 464-471. https://doi.org/10.1016/j.radmeas.2017.01.009

Vancouver

Timar-Gabor A, Buylaert JP, Guralnik B, Trandafir-Antohi O, Constantin D, Anechitei-Deacu V et al. On the importance of grain size in luminescence dating using quartz. Radiation Measurements. 2017 Nov 1;106:464-471. https://doi.org/10.1016/j.radmeas.2017.01.009

Author

Timar-Gabor, A. ; Buylaert, J. P. ; Guralnik, B. ; Trandafir-Antohi, O. ; Constantin, D. ; Anechitei-Deacu, V. ; Jain, M. ; Murray, A. S. ; Porat, N. ; Hao, Q. ; Wintle, A. G. / On the importance of grain size in luminescence dating using quartz. In: Radiation Measurements. 2017 ; Vol. 106. pp. 464-471.

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@article{54ea38e875cd43d794ec48b23121256f,
title = "On the importance of grain size in luminescence dating using quartz",
abstract = "There 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 (4–11 μm) and coarse-grain (63–90 μm) quartz single aliquot regeneration protocol (SAR) ages has been reported previously for Romanian and Serbian loess >40 ka (De 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 4–11 μm, 11–30 μm, 35–50 μm, 63–90 μm, 90–125 μm, 125–180 μm, and 180–250 μm). All dose response curves can be adequately described by a sum of two saturating exponential functions, whose saturation characteristics (D0 values) are clearly anticorrelated with grain diameter (φ) through an inverse square root relationship, D0 = A/√φ, 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 warrant the ability to record high doses accurately, or provide a corresponding extended age range",
keywords = "quartz, OSL, SAR, dsoe response, saturation characteristics, grain size",
author = "A. Timar-Gabor and Buylaert, {J. P.} and B. Guralnik and O. Trandafir-Antohi and D. Constantin and V. Anechitei-Deacu and M. Jain and Murray, {A. S.} and N. Porat and Q. Hao and Wintle, {A. G.}",
note = "This is the author accepted manuscript. The final version is available from Elsevier via http://dx.doi.org/10.1016/j.radmeas.2017.01.009",
year = "2017",
month = nov,
day = "1",
doi = "10.1016/j.radmeas.2017.01.009",
language = "English",
volume = "106",
pages = "464--471",
journal = "Radiation Measurements",
issn = "1350-4487",
publisher = "Elsevier",

}

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TY - JOUR

T1 - On the importance of grain size in luminescence dating using quartz

AU - Timar-Gabor, A.

AU - Buylaert, J. P.

AU - Guralnik, B.

AU - Trandafir-Antohi, O.

AU - Constantin, D.

AU - Anechitei-Deacu, V.

AU - Jain, M.

AU - Murray, A. S.

AU - Porat, N.

AU - Hao, Q.

AU - Wintle, A. G.

N1 - This is the author accepted manuscript. The final version is available from Elsevier via http://dx.doi.org/10.1016/j.radmeas.2017.01.009

PY - 2017/11/1

Y1 - 2017/11/1

N2 - There 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 (4–11 μm) and coarse-grain (63–90 μm) quartz single aliquot regeneration protocol (SAR) ages has been reported previously for Romanian and Serbian loess >40 ka (De 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 4–11 μm, 11–30 μm, 35–50 μm, 63–90 μm, 90–125 μm, 125–180 μm, and 180–250 μm). All dose response curves can be adequately described by a sum of two saturating exponential functions, whose saturation characteristics (D0 values) are clearly anticorrelated with grain diameter (φ) through an inverse square root relationship, D0 = A/√φ, 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 warrant the ability to record high doses accurately, or provide a corresponding extended age range

AB - There 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 (4–11 μm) and coarse-grain (63–90 μm) quartz single aliquot regeneration protocol (SAR) ages has been reported previously for Romanian and Serbian loess >40 ka (De 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 4–11 μm, 11–30 μm, 35–50 μm, 63–90 μm, 90–125 μm, 125–180 μm, and 180–250 μm). All dose response curves can be adequately described by a sum of two saturating exponential functions, whose saturation characteristics (D0 values) are clearly anticorrelated with grain diameter (φ) through an inverse square root relationship, D0 = A/√φ, 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 warrant the ability to record high doses accurately, or provide a corresponding extended age range

KW - quartz

KW - OSL

KW - SAR

KW - dsoe response

KW - saturation characteristics

KW - grain size

UR - http://hdl.handle.net/2160/44522

U2 - 10.1016/j.radmeas.2017.01.009

DO - 10.1016/j.radmeas.2017.01.009

M3 - Article

VL - 106

SP - 464

EP - 471

JO - Radiation Measurements

JF - Radiation Measurements

SN - 1350-4487

ER -

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