Residual OSL signals in modern fluvial sediments from the Yellow River (HuangHe) and the implications for dating young sediments

Hu, Gang; Zhang, Jiafu; Qiu, Wei-Li; Zhou, Liping

doi:10.1016/j.quageo.2009.05.003

Cited by 74 publications

(58 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Based on these measurements 370 and the results of the preheat plateau test we chose to employ a preheat temperature 371 of 200°C and a cutheat temperature of 180°C; this combination is commonly used for 372 young samples (e.g. Madsen et al, 2007;Hu et al, 2010). 373…”

Section: Effect Of Preheat Temperature 353mentioning

confidence: 99%

Reliability of equivalent-dose determination and age-models in the OSL dating of historical and modern palaeoflood sediments

Medialdea

Thomsen

Murray

et al. 2014

Quaternary Geochronology

View full text Add to dashboard Cite

G. (2014). Reliability of equivalent-dose determination and age-models in the OSL dating of historical and modern palaeoflood sediments. Quaternary Geochronology, 22, 11-24. DOI: 10.1016/j.quageo.2014 Elsevier Editorial System(tm) for Quaternary Geochronology Manuscript DraftManuscript Number: QUAGEO-D-12-00096R1Title: Reliability of equivalent-dose determination and age-models in the OSL dating of historical and modern palaeoflood sediments Abstract: The challenge of accurately estimating the deposition age of incompletely-bleached samples in luminescence dating has motivated developments in the analysis of single grain dose distributions, and a number of statistical approaches have been proposed over the last few years. In this study, we compare the behaviour of the arithmetic average, the so-called 'robust statistics', the Central Age Model (CAM), the Minimum Age Model (MAM) and the Internal-External Consistency Criterion (IEU), when applied to single-grain and small multi-grain (~30 grains per aliquot) dose distributions from a sequence of eight recent (40-1000 years old) flash-flood deposits. These sediments are expected to be incompletely bleached, but all have age control from historical records. Modifications were made to allow the use of the standard CAM and MAM models with dose distributions containing near zero and negative dose values. An assessment of minimum uncertainty on individual dose estimates is based on the over-dispersion (OD) determined in dose recovery tests making use of gamma-irradiated samples. We then present a detailed analysis of the impact of appropriate uncertainty assignment on minimum (MAM and IEU) burial dose estimates. The results of the various models are discussed in terms of the accuracy of the resulting age, and we conclude that, overall, the IEU approach generates the most accurate ages. We also demonstrate that accurate IEU ages can be obtained from multi-grain measurements if an age off-set of ~40 years can be considered to be unimportant for the samples in question. From our study we conclude that these and similar young slack-water flood deposits can be accurately dated using quartz OSL, opening up the possibility of establishing time series of flood discharge in catchments for which no instrumental or historical record exists. 1Reliability of equivalent-dose determination and age-models in the OSL dating of 1 historical and modern palaeoflood sediments 2 3 Medialdea 1,3 , A., Thomsen 2 , K.J., Murray 3 , A.S., Benito 1 , G. 41. Museo Nacional de Ciencias Naturales, CSIC, Serrano 115bis, 28006 Madrid, 5Spain. amedialdea@mncn.csic.es 6 2. Center for Nuclear Technologies, Technical University of Denmark, DTU Risø 7Campus, Frederiksborgvej 399, 4000 Roskilde, Denmark. The challenge of accurately estimating the deposition age of incompletely-bleached 13 samples in luminescence dating has motivated developments in the analysis of 14 single grain dose distributions, and a number of statistical approaches have been 15proposed over the last few years. In this study, we comp...

show abstract

Section: Effect Of Preheat Temperature 353mentioning

confidence: 99%

Reliability of equivalent-dose determination and age-models in the OSL dating of historical and modern palaeoflood sediments

Medialdea

Thomsen

Murray

et al. 2014

Quaternary Geochronology

View full text Add to dashboard Cite

show abstract

“…Olley et al, 1998;Wallinga et al, 2001;Colls et al, 2001;Vandenberghe et al, 2007). In general, it is claimed that the sand sized fraction (coarse grains) is much more probable to get reset adequately then the silt sized fraction (fine grains) (Hu et al, 2010, Vandenberghe et al, 2007Alexanderson, 2007). This is explained mostly by the coagulation of fine grains during transport and deposition, whereas coarse bedload grains might be exposed to sunlight more probably on the surface of bars for example (Hu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Variation of OSL residual doses in terms of coarse and fine grain modern sediments along the Hungarian section of the Danube

et al. 2017

View full text Add to dashboard Cite

Reliable OSL dating of fluvial sediments requires an assessment of incomplete bleaching and consequent residual dose in samples. A well-established way of this is determining the equivalent dose of modern samples from similar sedimentary environments as in the case of palaeo-samples. Meanwhile, relatively low, or close to zero doses are also greatly affected by the thermal transfer phenomenon, which can also lead to a palaeodose overestimation. The present study attempts to quantify both factors in coarse and fine grain modern sediments along the Hungarian section of the Danube River, with the aim of determining their significance when dating both young and palaeosediments. Investigations were performed at 30 sites along a 417 km long river section with varying morphological and erosive character. The studied samples were deposited during the record flood of 2013, mobilising and relocating a vast amount of sediment in the system. Tests have shown that thermal transfer can be minimized successfully by choosing preheat temperatures below 200°C, however it remains a significant factor when dating young or modern sediments. Based on equivalent dose measurements, coarse grain samples proved to be relatively well bleached, and residual doses showed only a minor spatial variation. Although in terms of fine grain samples residual doses were obviously much higher, results can enhance the reliability of dates retrieved later from fine grain palaeosamples. In the meantime, the higher spatial variability of fine grain residual doses may also allow the assessment of the erosive character of different river reaches.

show abstract

“…Fluviális minták OSL kormeghatározásakor nem szabad figyelmen kívül hagyni, hogy a hordalék nullázódása nem feltétlenül teljes, tehát a mintában maradvány jelek maradhatnak (Hu et al 2010). Ennek oka, hogy a hordalékszállítás során a homokszemcsék fénynek való kitettsége nem teljes a zavaros vízben, tehát a szemcsék lerakódása előtt nem történik meg a minták teljes mértékű nullázódása (Rittenour 2008, Lauer et al 2010.…”

Section: Osl Korokunclassified

“…Ennek oka, hogy a hordalékszállítás során a homokszemcsék fénynek való kitettsége nem teljes a zavaros vízben, tehát a szemcsék lerakódása előtt nem történik meg a minták teljes mértékű nullázódása (Rittenour 2008, Lauer et al 2010. A maradvány jelek jelenléte a minták korának túlbecsléséhez vezethet (Hu et al 2010).…”

Section: Osl Korokunclassified

A Maros hordalékkúp fejlődéstörténeti rekonstrukciója

Sümeghy

View full text Add to dashboard Cite

Residual OSL signals in modern fluvial sediments from the Yellow River (HuangHe) and the implications for dating young sediments

Cited by 74 publications

References 37 publications

Reliability of equivalent-dose determination and age-models in the OSL dating of historical and modern palaeoflood sediments

Reliability of equivalent-dose determination and age-models in the OSL dating of historical and modern palaeoflood sediments

Variation of OSL residual doses in terms of coarse and fine grain modern sediments along the Hungarian section of the Danube

A Maros hordalékkúp fejlődéstörténeti rekonstrukciója

Contact Info

Product

Resources

About