Investigations into the potential effects of pedoturbation on luminescence dating

Bateman, Mark D.; Frederick, Charles D.; Jaiswal, Manoj K.; Singhvi, A. K.

doi:10.1016/s0277-3791(03)00019-2

Cited by 183 publications

(129 citation statements)

References 10 publications

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“…Akin microdosimetric influences on equivalent dose distributions have been given accounts in other works (Murray and Roberts, 1997;Vandenberghe et al, 2003;Kalchgruber et al, 2003;Lomax et al, 2007). Post depositional influences such as increase of Radon emission due to diagenetic iron oxide staining on quartz grains (Vandenberghe et al, 2003), as well as intrusions of grains from other layers with different D e s (Bateman et al, 2003) are likely to have happened and perturbed initially consistent equivalent doses. Those assumptions may stand adequate in explaining the remaining scatter but cannot be fully controlled by current means.…”

Section: Dependence Of D E On Growth Curve Shapementioning

confidence: 92%

Constraints on the precision of SAR in equivalent dose estimations close to saturation in quartz

Athanassas

2011

Geochronometria

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Difficulties in evaluating accurate equivalent doses for Late Quaternary sediments from the south coasts of Greece arose in the course of SAR measurements. Large scatter among apparent equivalent doses perplexed the evaluation of accurate mean estimates in circumstances where very large doses were involved. Besides, dose recovery experiments revealed that when intersection of the natural signal occurs onto the saturating segment of the growth curve, a distinct relationship between D e and growth curve shape occurs. At very low slope angles, SAR tends to overestimate the recovered dose. The mechanism which controls the spread in equivalent dose estimation is investigated.

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Section: Dependence Of D E On Growth Curve Shapementioning

confidence: 92%

Constraints on the precision of SAR in equivalent dose estimations close to saturation in quartz

Athanassas

2011

Geochronometria

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“…with a low-dose tail, while the MAM is usually applied to positively skewed dose distributions, suspected of incomplete bleaching, to pick out the lowest, best bleached dose population (Galbraith et al, 1999;Bailey and Arnold, 2006). Bateman et al (2003; have shown at the single-grain level that negatively skewed dose distributions may be due to bioturbation, where young material has been brought to lower stratigraphic levels. Since the MAM identifies the lowest dose population, and would thus incorporate any such too young aliquots in the age calculation, it may give a too young age.…”

Section: Aeolian Activitymentioning

confidence: 99%

Holocene Chronology of the Brattforsheden Delta and Inland Dune Field, Sw Sweden

Alexanderson

Fabel

2015

Geochronometria

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Abstract:Brattforsheden is a large glacifluvial deposit in southwestern Sweden and associated with it is one of Sweden's largest inland dune fields. Although the relative ages of the Brattforsheden deposits are well known, absolute ages from the area are few. In this study we have used optically stimulated luminescence (OSL), surface exposure ( 10 Be) and radiocarbon ( 14 C) dating to provide an absolute chronology for the deglaciation and for the Holocene development of the aeolian dunes. Our data show that the deglaciation took place just before 11 ka (11.5 ± 0.6 ka OSL, 11.3 ± 0.8 ka 10 Be), in line with the 14 C-based regional deglaciation age. Aeolian dunes started forming immediately after deglaciation and were active for at least 2000 years, well after vegetation had established. Renewed aeolian activity occurred 270-180 years ago, resulting in the deposition of sand sheets. Comparison between dating methods and studies of OSL dose distributions show that glacial, glacifluvial and littoral sediments suffer from incomplete bleaching and thus that mean OSL ages from such deposits overestimate the true depositional age. By using small aliquots and statistical age models, this effect can partly be countered. Also, some of the 10 Be ages appear too old, which may be due to previous exposure.

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“…Most OSL ages are based on measurements of at least 24 replicates to check reproducibility and take steps to avoid incorporation of any antecedent (pre burial) signal and the effects post-depositional disturbance (e.g. Bateman et al 2003;, all of which takes time to attain the required laboratory precision.…”

Section: Introductionmentioning

confidence: 99%

Instant luminescence chronologies? High resolution luminescence profiles using a portable luminescence reader

Bateman

Stein

Ashurst

et al. 2015

Quaternary Geochronology

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Establishing a robust chronology is fundamental to most palaeoenvironmental studies. However, the number and positioning of dated points is critical. Using a portable luminescence reader, it is possible to rapidly generate high resolution down core relative age profiles. Profiles of portable luminescence data from two coastal dunes were evaluated and compared with the results of particle size analysis, stratigraphy, and an independent historical chronology. Results show that, even in young samples, portable luminescence data is dominated by an age related signal which in homogeneous sediment need not be corrected for moisture, feldspar content changes or grain size. Profiles therefore provide relative chronologies from which accumulation phases can be established, and from which better targeted sampling and comparison to other sites could be undertaken. Even though they do not provide instant absolute chronologies, field-based portable luminescence profiling of Late Quaternary sites hold much potential to improve the resultant chronologies.

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Investigations into the potential effects of pedoturbation on luminescence dating

Abstract: This is a repository copy of Investigations into the potential effects of pedoturbation on luminescence dating .

Cited by 183 publications

References 10 publications

Constraints on the precision of SAR in equivalent dose estimations close to saturation in quartz

Constraints on the precision of SAR in equivalent dose estimations close to saturation in quartz

Holocene Chronology of the Brattforsheden Delta and Inland Dune Field, Sw Sweden

Instant luminescence chronologies? High resolution luminescence profiles using a portable luminescence reader

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