De plateau and its implications for post-IR IRSL dating of polymineral fine grains

Zhang, Jingran; Tsukamoto, Sumiko; Nottebaum, Veit; Lehmkuhl, Frank; Frechen, Manfred

doi:10.1016/j.quageo.2015.02.003

Cited by 25 publications

(20 citation statements)

References 36 publications

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“…In particular, postinfrared-IRSL methods (pIRIR) are interesting, as these only show negligible fading rates in contrast to conventional IRSL methods (Buylaert et al, 2012;Murray et al, 2009;Thiel et al, 2011;Thomsen et al, 2008;Vasiliniuc et al, 2012 andZhang et al, 2015). For protocols with elevated preheat and stimulation temperatures fading rates <1%/decade are observed (Zhang et al, 2015), which were suggested to be a laboratory artifact .…”

Section: Introductionmentioning

confidence: 99%

New luminescence-based geochronology framing the last two glacial cycles at the southern limit of European Pleistocene loess in Stalać (Serbia)

et al. 2017

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Abstract:A new geochronology was established for the Stalać loess-paleosol sequence (LPS) in Serbia. The section is located in the interior of the Central Balkan region, south of the typical loess distribution, in a zone of paleoclimatic shifts between continental and Mediterranean climate regimes. The sampled sequence contains four well-developed paleosol and loess layers, a crypto tephra and one visible tephra layer. Optically stimulated luminescence measurements showed a strong dependency of preheat temperature on equivalent dose for one fine-grained quartz sample, which makes it unsuitable for dating. A firm chronology framing the last two glacial cycles was established using finegrained polyminerals and the post-infrared infrared stimulated luminescence (pIR 50 IR 290 ) protocol instead. The characteristics of dated paleosols indicate similar climatic conditions during the last interstadial and interglacial phases, which were different from the penultimate interglacial period. The tephra within the L2 loess, probably related to tephra layers also found in other sections in Southeastern Europe, was sandwich-dated. The results indicate an age between 118 ka and 141 ka. Furthermore, a weak pedogenic layer dated to between 126 ka and 148 ka gives a first numerical age to this soil formation in Southeastern Europe.

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Section: Introductionmentioning

confidence: 99%

New luminescence-based geochronology framing the last two glacial cycles at the southern limit of European Pleistocene loess in Stalać (Serbia)

et al. 2017

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“…This is consistent with the trends observed by both Roberts (2012) and Zhang et al . (2015), who also saw a tendency for D e to increase as higher preheat temperatures were applied. Given the consistency in D e values measured using lower temperatures, a pIRIR 225 protocol with the 250 °C preheat was selected.…”

Section: Equivalent Dose Determinationmentioning

confidence: 93%

A 180 ka record of environmental change at Erdut (Croatia): a new chronology for the loess–palaeosol sequence and its implications for environmental interpretation

Fenn

Durcan

Thomas

et al. 2020

J Quaternary Science

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While there are numerous thick loess-palaeosol sequences preserved across the Carpathian Basin, well dated sites that provide terrestrial palaeoenvironmental records extending beyond last glacial-interglacial cycle are scarce. Robust chronologies are essential for correlations of loess with other long-term Quaternary records and to further understanding of the palaeoenvironment and climate of this important region beyond the last 125 ka. Here a new geochronology based on 13 post-infrared infrared stimulated luminescence ages focused on the lower part of the loess-palaeosol sequence at Erdut is presented. The results show that the lower part of the Erdut profile spans the penultimate glacial cycle (MIS 7 to MIS 5). The considerable sediments overlaying the investigated part of the profile suggest that this section spans two glacial cycles, rather than the previously suggested one. The most likely source of the discrepancy is the use of uncorrected infrared stimulated luminescence signal, which can cause age underestimation if not accounted for. This study demonstrates the need to revisit sites such as Erdut, re-date them using updated measurement protocols, and update existing palaeoenvironmental interpretations.

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“…While quite high pIRIR 50, 290 residual doses (20-55 Gy) were reported for modern glaciofluvial sediments from a glaciated bay [42]. In various solar bleaching experiments, the measured residual doses of the pIRIR signals varied within a wide range, from less than 2 Gy to >40 Gy [38,39,[43][44][45], and the residual doses increased systematically with higher preheat temperature and stimulation temperature [46][47][48]. A positive relationship between the residual doses and D e values has been documented in numerous studies [39,[49][50][51][52][53][54].…”

Section: Two-step Ir Stimulationmentioning

confidence: 93%

Review of the Post-IR IRSL Dating Protocols of K-Feldspar

Zhang

2020

MPs

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Compared to quartz, the infrared stimulated luminescence (IRSL) of K-feldspar saturates at higher dose, which has great potential for extending the dating limit. However, dating applications with K-feldspar has been hampered due to anomalous fading of the IRSL signal. The post-IR IRSL (pIRIR) signal of K-feldspar stimulated at a higher temperature after a prior low-temperature IR stimulation has significantly lower fading rate. Different dating protocols have been proposed with the pIRIR signals and successful dating applications have been made. In this study, we review the development of various pIRIR dating protocols, and compare their performance in estimating the equivalent dose (De). Standard growth curves (SGCs) of the pIRIR signals of K-feldspar are introduced. Single-grain K-feldspar pIRIR dating is presented and the existing problems are discussed.

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De plateau and its implications for post-IR IRSL dating of polymineral fine grains

Cited by 25 publications

References 36 publications

New luminescence-based geochronology framing the last two glacial cycles at the southern limit of European Pleistocene loess in Stalać (Serbia)

New luminescence-based geochronology framing the last two glacial cycles at the southern limit of European Pleistocene loess in Stalać (Serbia)

A 180 ka record of environmental change at Erdut (Croatia): a new chronology for the loess–palaeosol sequence and its implications for environmental interpretation

Review of the Post-IR IRSL Dating Protocols of K-Feldspar

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