Fluvial transport as a natural luminescence sensitiser of quartz

Pietsch, Tim; Olley, J. M.; Nanson, Gerald C.

doi:10.1016/j.quageo.2007.12.005

Cited by 185 publications

(133 citation statements)

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“…Prior research has shown that sensitivity of quartz grains changes in 73 response to fluvial transport (Pietsch et al, 2008), and that quartz luminescence intensity 74 changes in response to tributary inputs into large river systems (Stokes et al, 2001). We 75 observe a roughly exponential decrease in multiple elevated temperature post-IR IRSL (MET-76 pIRIR) signals as a function of distance downriver, and propose that this result is a consequence 77 of cycles of transport (signal bleaching) and deposition (signal growth) (Figure 2).…”

Section: Determining Fluvial Sediment Virtual Velocity On the Mojave mentioning

confidence: 99%

Determining fluvial sediment virtual velocity on the Mojave River using K-feldspar IRSL: Initial assessment

McGuire

Rhodes

2015

Quaternary International

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Section: Determining Fluvial Sediment Virtual Velocity On the Mojave mentioning

confidence: 99%

Determining fluvial sediment virtual velocity on the Mojave River using K-feldspar IRSL: Initial assessment

McGuire

Rhodes

2015

Quaternary International

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“…It is therefore of benefit to understand potential causes of sensitisation of quartz within the natural system, and to identify to what degree source geology and crystal formation (Westaway, 2009) and sedimentary processes (Pietsch et al, 2008) influence sensitivity and can be used to predict the suitability of sediments for dating. This paper attempts an empirical assessment of the natural OSL sensitivity characteristics of single grains of Australian quartz, from various source rocks and depositional contexts with respect to their suitability for dating.…”

Section: Introductionmentioning

confidence: 99%

“…Li and Wintle, 1992;Li and Wintle, 1991). Luminescence sensitisation of quartz must therefore be a product of the interplay between source lithology (Li et al, 2007;Westaway, 2009) and sediment history Pietsch et al, 2008;Preusser et al, 2006). Sensitisation of quartz within natural sedimentary systems has been understudied relative to laboratory experiments.…”

Section: Introductionmentioning

confidence: 99%

“…Sensitisation of quartz within natural sedimentary systems has been understudied relative to laboratory experiments. Until now, the generally high OSL sensitivity of Australian quartz has been assumed to be due to the typically long histories experienced by sediments on the continent, which cause sensitisation through repeated reworking and burial (Pietsch et al, 2008). However, there is also evidence that the nature of exposure immediately prior to the most recent burial event increases OSL sensitivity .…”

Section: Introductionmentioning

confidence: 99%

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An assessment of the luminescence sensitivity of Australian quartz with respect to sediment history

Fitzsimmons¹

2011

Geochronometria

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Abstract:This study provides a preliminary systematic characterisation of OSL sensitivity, with respect to sediment history, of single grains of Australian quartz from a variety of source rocks and depositional contexts. Samples from two distinct lithologies and with relatively short modern sedimentary histories were compared in an examination of the influence of rock type on OSL sensitivity. Sediments derived from weathered sandstone were found to be brighter than those from metamorphosed schists, suggesting that sensitivity may be inherited from the source rock and its earlier sedimentary history. Secondly, quartz from the same source, but different modes of deposition, was compared to assess the effect on sensitivity of nature of exposure to light during the most recent bleaching event. Quartz grain sensitivity appears not to vary depending on the mode of sediment deposition, suggesting that the nature of exposure to light during deposition is less important in the sensitisation process. This study highlights the complexity and variety of natural sedimentary quartz, demonstrating the limitations of an investigation based solely on OSL sensitivity. Further systematic investigation into the physical, geological and geomorphological characteristics of sediments is proposed to better understand the mechanisms of luminescence sensitisation in quartz.

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“…This is often due to quartz's highly variable OSL quantum efficiency (QE). The controls over quartz OSL QE remain unclear but have been linked to geological provenance (Götze et al, 2004;Rink et al, 1993;Westaway, 2009), irradiation (Rink, 1994, transport and thermal histories (Pietsch et al, 2008;Preusser et al, 2006). However quartz with the same irradiation, source and depositional histories often exhibit highly variable emission intensities McFee and Tite, 1998).…”

Section: Introductionmentioning

confidence: 99%

The problem of dating quartz 1: Spectroscopic ionoluminescence of dose dependence

King

Finch

Robinson

et al. 2011

Radiation Measurements

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A suite of quartz samples of different provenances, irradiation, thermal and depositional histories were analysed using spectroscopic ionoluminescence (IL) to investigate variations in emission spectra as a function of cumulative radiation dosing. Protons were selected for implantation to mimic the effect of natural radiation over geological timescales. All samples exhibited depletion in the UV-violet emission (3.2-3.4 eV) with increasing cumulative dose, whilst the red emission (1.8-1.9 eV) increased. A power-law relationship exists between the two emissions. It is inferred that the luminescence emission of quartz is indicative of its radiation history, and spectral analyses could be used to determine the utility of different quartz samples for optically stimulated luminescence dating (OSL) where the detection range is limited to 3.4-4.6 eV. KeywordsSpectroscopic ionoluminescence, implantation, protons, quartz, optically stimulated luminescence dating. AbbreviationsIonoluminescence (IL), Ultra-violet (UV), Optically Stimulated Luminescence (OSL) IntroductionOSL is used as a radiation dosimeter method within Quaternary geochronology, archaeology and retrospective accident dosimetry. Of the materials used for OSL studies, quartz is usually preferred (Aitken, 1998;Huntley et al., 1985). In addition, quartz has a range of industrial applications, which has rendered it the focus of intense research both into its physical and chemical properties, and its emission spectroscopy (see Götze, 2009; Krbetschek et al., 1997 for reviews). Numerous OSL dating applications to sediments of different ages (e.g. Ballarini et al., 2003;Pawley et al., 2008), provenances (e.g. Preusser et al., 2006) and depositional environments (e.g. Thrasher et al., 2009;Wallinga, 2002) have been made. However, despite the development of the single-aliquot regenerative dose protocol (Murray and Wintle, 2000), it is currently not possible to date all quartz using OSL. This is often due to quartz's highly variable OSL quantum efficiency (QE). The controls over quartz OSL QE remain unclear but have been linked to geological provenance (Götze et al., 2004;Rink et al., 1993;Westaway, 2009), irradiation (Rink, 1994, transport and thermal histories (Pietsch et al., 2008;Preusser et al., 2006). However quartz with the same irradiation, source and depositional histories often exhibit highly variable emission intensities McFee and Tite, 1998).The light emitted by quartz most commonly comprises bands in the UV-blue and red/IR (Krbetschek et al., 1997). Risø readers, the most widely used OSL instrumentation, stimulate the quartz with diodes at 470±20 nm (2.6 eV) and measure the response through Hoya U340 filters . The transparency of these filters lies between 3.4 and 4.6 eV and only a part of the UV-blue emission band is monitored. The remainder of the emission (below 3.4 eV and above 4.6 eV) is unmeasured in conventional OSL but may contain significant dosimetry or geological provenance information.Ionoluminescence (IL, also known as ion beam lumin...

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Fluvial transport as a natural luminescence sensitiser of quartz

Cited by 185 publications

References 35 publications

Determining fluvial sediment virtual velocity on the Mojave River using K-feldspar IRSL: Initial assessment

Determining fluvial sediment virtual velocity on the Mojave River using K-feldspar IRSL: Initial assessment

An assessment of the luminescence sensitivity of Australian quartz with respect to sediment history

The problem of dating quartz 1: Spectroscopic ionoluminescence of dose dependence

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