OSL dating of fine-grained quartz from Holocene Yangtze delta sediments

Sugisaki, Saiko; Buylaert, Jan‐Pieter; Murray, Andrew; Tada, Ryuji; Zheng, Hongbo; Wang, Ke; Saito, Keita; Luo, Chao; Li, Shiyi; Irino, Tomohisa

doi:10.1016/j.quageo.2015.02.021

Cited by 42 publications

(29 citation statements)

References 26 publications

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“…This argument is based on the widely-observed differential bleaching rates of quartz and feldspar signals (e.g. Godfrey-Smith et al, 1988;Thomsen et al, 2008;Buylaert et al, 2012;Murray et al, 2012;Sugisaki et al, 2015;Colarossi et al, 2015) when exposed to a daylight spectrum, and helps to quantitatively address one of the main uncertainties in the application of OSL to dating.…”

Section: K-rich Feldsparmentioning

confidence: 99%

Age of a prehistoric “Rodedian” cult site constrained by sediment and rock surface luminescence dating techniques

Sohbati

Murray

Porat

et al. 2015

Quaternary Geochronology

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Section: K-rich Feldsparmentioning

confidence: 99%

Age of a prehistoric “Rodedian” cult site constrained by sediment and rock surface luminescence dating techniques

Sohbati

Murray

Porat

et al. 2015

Quaternary Geochronology

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“…Group I may represent modern deposits, while Group II sediments may be significantly older and are now exposed due to erosion. Optically stimulated luminescence dating of two cores (YD13‐G3 and YD13‐H1) further offshore (Figure b) reveals that cored surface sediments have ages of ~2,000 years (Sugisaki et al, ). This supports the interpretation that exposure of older sediment at the surface can occur in the subaqueous delta.…”

Section: Discussionmentioning

confidence: 99%

“…Locations of (a) the study area in eastern China, with regional current system (modified after Yang, Jung, et al, ) including Yellow Sea coastal current (YSCC), Changjiang (Yangtze) diluted water (CDW), East China Sea coastal current (ECSCC), Taiwan warm current (TWC), and Kuroshio current (KC); and (b) sampling sites of surface and core sediments (A3‐4, A6‐2). Also included are cited cores, including YD0901 (Wang et al, ; Zheng et al, ), YD13‐G3, YD13‐H1 (Sugisaki et al, ), and SC07 (Pan et al, ). The surface samples are classified into three groups (I–III) according to variations of magnetic properties and particle size (Figure ).…”

Section: Study Area and Methodsmentioning

confidence: 99%

Tracing Sediment Erosion in the Yangtze River Subaqueous Delta Using Magnetic Methods

Zhang

Dong

et al. 2017

JGR Earth Surface

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We assessed the usefulness of magnetic properties for tracing sediment erosion in a deltaic environment. Surface and core sediments from the Yangtze River subaqueous delta were subjected to magnetic, granulometric, geochemical, and radionuclide analyses. Based on magnetic properties and particle size, the surface sediments can be divided into three groups. Groups I and II have a similar particle size distribution and geochemical composition, but the former has higher values of magnetic susceptibility (χ) and saturation isothermal remanent magnetization (SIRM). We interpret Group I as consisting of modern sediments, while Group II represents previously buried sediments that have undergone significant reductive diagenesis and that have been subsequently exposed by erosion. Group III has coarser particle size, which reflects the mixing of delta sediments with Pleistocene relict sands. Two cores from the areas occupied by Groups I and II have significantly different magnetic profiles. Core A3‐4 (Group II) records a partial loss of magnetic mineral concentration due to diagenesis and has much lower χ, SIRM, and S−300 values than core A6‐2 (Group I). Radionuclide dating reveals that core A3‐4 sediments are older. We conclude that core A3‐4 location has undergone erosion, which is consistent with recent bathymetric survey results. We propose that the ratio of SIRM/Fe can be potentially used to trace mobilized old sediment in this environment. Our study demonstrates that magnetic properties provide a robust approach for studying sediment dynamics in this type of environment. In addition, our findings provide insights into the nature of biogeochemical processes associated with deltaic erosion.

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“…Several studies have shown that the quartz OSL signal resets faster than the K‐feldspar IR 50 signal and that the IR 50 signal, in turn, bleaches more rapidly than the elevated temperature pIRIR signals (e.g. Godfrey‐Smith et al ., ; Thomsen et al ., ; Murray et al ., ; Kars et al ., ; Colarossi et al ., ; Möller and Murray, ; Sugisaki et al ., ). Based on this, Murray et al .…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have shown that the quartz OSL signal resets faster than the K-feldspar IR 50 signal and that the IR 50 signal, in turn, bleaches more rapidly than the elevated temperature pIRIR signals (e.g. Godfrey-Smith et al, 1988;Thomsen et al, 2008;Murray et al, 2012;Kars et al, 2014b;Colarossi et al, 2015;M€ oller and Murray, 2015;Sugisaki et al, 2015). Based on this, Murray et al (2012) suggested an approach to identify well-bleached quartz samples by comparing quartz and K-feldspar equivalent doses.…”

Section: Discussionmentioning

confidence: 99%

Optical dating of loessic hillslope sediments constrains timing of prehistoric rockfalls, Christchurch, New Zealand

Sohbati

Borella

Murray

et al. 2016

J Quaternary Science

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Developing a robust chronology for mass-movement events is of crucial importance to understanding triggering mechanisms and assessing hazards. We constrain the emplacement time of four palaeorockfall boulders near Christchurch, New Zealand, using optically stimulated luminescence (OSL) of quartz and infrared stimulated luminescence dating (IRSL) of K-feldspar from colluvial loess deposits underlying and upslope of individual boulders. The quartz OSL and K-feldspar pIRIR 290 ages are all consistent with the stratigraphy and in excellent agreement with each other, indicating that all the boulders that overlie the in-situ loess and oldest loess colluvium unit must have been emplaced < 13 ka ago. A comparison of luminescence ages with cosmogenic 3 He surface-exposure ages from the surfaces of each boulder shows that two out of four boulders contain pre-deposition 3 He inheritance.Overall, the optical ages are consistent with both a prehistoric rockfall event at ~8-6 ka and a possible preceding event at ~14-13 ka, although the temporal resolution of the time of emplacement of individual boulders is ca. 3-5 ka. This resolution is not limited by age uncertainties but rather by the stratigraphy. This study is the first to show a successful application of luminescence dating to New

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OSL dating of fine-grained quartz from Holocene Yangtze delta sediments

Cited by 42 publications

References 26 publications

Age of a prehistoric “Rodedian” cult site constrained by sediment and rock surface luminescence dating techniques

Age of a prehistoric “Rodedian” cult site constrained by sediment and rock surface luminescence dating techniques

Tracing Sediment Erosion in the Yangtze River Subaqueous Delta Using Magnetic Methods

Optical dating of loessic hillslope sediments constrains timing of prehistoric rockfalls, Christchurch, New Zealand

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