Attaining provenance proxies from OSL and TL sensitivities: Coupling with grain size and heavy minerals data from southern Brazilian coastal sediments

Zular, André; Sawakuchi, André Oliveira; Guedes, Carlos Conforti Ferreira; Giannini, Paulo César Fonseca

doi:10.1016/j.radmeas.2015.04.010

Cited by 19 publications

(22 citation statements)

References 31 publications

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“…Sample preparation and luminescence measurements were carried out in the Luminescence and Gamma Spectrometry Laboratory of the Institute of Geosciences, University of São Paulo, Brazil. The measurement protocol was adapted from protocols suggested by Zular et al () and Sawakuchi et al () to measure luminescence sensitivity (intensity of emitted light per unit mass per unit radiation dose) related to quartz and feldspar grains from polymineral aliquots. Table shows the protocol used in this study for luminescence measurements.…”

Section: Methodsmentioning

confidence: 99%

“…Grains of heavy minerals or mica have an insignificant contribution to OSL and TL signals of quartz or feldspar measured in polymineral aliquots. This is supported by the low sensitivity of these minerals compared to the OSL and TL (UV emission) of quartz and feldspar (del Río et al, 2019;Krbetschek et al, 1997;Zular et al, 2015). After every chemical treatment step, samples were washed 2 times with distilled water to remove the chemical reagents.…”

Section: Luminescence Measurementsmentioning

confidence: 99%

“…Pioneering studies about the luminescence of quartz (Huntley et al, ) and feldspar (Godfrey‐Smith et al, ) supported the development of a well‐established dating method to determine sediment burial ages for Quaternary sedimentary sequences (Buylaert et al, ; Murray & Wintle, ). In the recent years, the OSL and TL of quartz and feldspar provided the basis for new methods to study Earth surface processes, including surface exposure dating (Sohbati et al, ), estimation of Quaternary uplift rates in mountain building zones (King et al, ), and sediment provenance (Nian et al, ; Sawakuchi et al, ; Sawakuchi et al, ; Zular et al, ). Here we applied OSL and TL signals related to quartz and feldspar from marine sediment core GeoB16206‐1 collected off northeastern South America (Figure ) as proxies to track changes in precipitation.…”

Section: Introductionmentioning

confidence: 99%

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Thermoluminescence and Optically Stimulated Luminescence Measured in Marine Sediments Indicate Precipitation Changes Over Northeastern Brazil

Mendes

Sawakuchi

Chiessi

et al. 2019

Paleoceanog and Paleoclimatol

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Marine sediment cores offer a great number of proxies for reconstructions of past environmental conditions, such as ocean temperature, salinity, primary productivity, stratification of the upper water column, and continental precipitation. Up to date, continental precipitation archived in marine sediment cores is reconstructed based mainly on the hydrogen isotopic composition of plant‐wax compounds (i.e., n‐alkane δD) or on the ratio between terrigenous and marine sediments expressed as elemental ratios (e.g., ln (Fe/Ca)). Although these proxies provide reliable precipitation reconstructions, there are some inherent limitations, as plant‐wax δD application depends on the availability of n‐alkanes in marine sediments and elemental ratios can be influenced by other factors like the relative sea‐level, primary productivity, and postdepositional processes. Here we introduce new precipitation proxies based on optically stimulated luminescence and thermoluminescence signals of quartz and feldspar. The rationale is that when precipitation changes over the catchment through time, different sediment sources regarding weathering intensity and parent rock types are drained, supplying sediments with varying signals of luminescence to the ocean. We compared our new proxy records with records of well‐established proxies, for the same (ln (Fe/Ca)) and neighboring (n‐alkane δD) marine sediment cores. The comparison among all proxies as well as with a state‐of‐art transient climate model run (TraCE‐21ka) demonstrates that the new proxies accurately constrain precipitation changes over northeastern Brazil for the last 30,000 years. The main advantage of these new proxies relies on their fast response to precipitation changes over the continent. Furthermore, they are straightforward to measure and not expensive.

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Section: Methodsmentioning

confidence: 99%

Section: Luminescence Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermoluminescence and Optically Stimulated Luminescence Measured in Marine Sediments Indicate Precipitation Changes Over Northeastern Brazil

Mendes

Sawakuchi

Chiessi

et al. 2019

Paleoceanog and Paleoclimatol

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“…In contrast, deltaic systems host highly variable bleaching conditions that probably reflect varying levels of water turbidity, sediment transport distances, and driving mechanisms such as streamflow and wave action, leading to large variation in the extent of bleaching (Chamberlain et al, , Chamberlain, Törnqvist, et al, ). As with deltaic systems, coastal systems involve an ensemble of processes and factors, such as climate‐modulated storm frequency and magnitude, that control wave action, which in turn controls sediment sourcing, transport, reworking, and light exposure (Fruergaard et al, ; López et al, ; Reimann et al, ; Sawakuchi et al, ; Zular et al, ). As such, incompletely bleached sediment is not uncommon in coastal systems (Richardson, ; Jacobs, ; Alexanderson & Murray, ), although well‐bleached samples can be found (Murray et al, ; Madsen & Murray, ; Chamberlain, Wallinga, et al, ).…”

Section: Luminescence and Its Characteristics In Geomorphic Environmentsmentioning

confidence: 99%

“…Sawakuchi et al () noted in the Amazon River Basin of South America that low sensitivity quartz derives from areas under higher denudation rate, which promote a fast conversion of quartz crystals from parent rocks into sediment grains, whereas high sensitivity quartz occurs in sediments from tectonically stable areas with low denudation rates. This link with source geology at various geographic locations sets the basis for luminescence sensitivity as a provenance tool (Nascimento et al, ; Sawakuchi et al, ; Sawakuchi et al, ; Zular et al, ) as discussed in later sections.…”

Section: Luminescence and Its Characteristics In Geomorphic Environmentsmentioning

confidence: 99%

Luminescence as a Sediment Tracer and Provenance Tool

Gray

Jain

Sawakuchi

et al. 2019

Reviews of Geophysics

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Luminescence holds unique potential as a sediment tracer and provenance method. The tracer application of luminescence has key advantages including ease of measurement, relatively low cost, and applicability to geologically ubiquitous quartz and feldspar sand and silt. These advantages can help answer fundamental questions about geomorphology, sediment transport, sediment production, and the tectonic/climatic controls on source‐to‐sink sedimentary systems. There is a notable body of research on luminescence as a sediment tracer. These tracer methods range from identifying source locations based on unique luminescence characteristics, to observing changes in luminescence characteristics with transport, to using residual luminescence to infer rates of transport. Previous applications of luminescence include provenance and quantification of fluvial transport rate, tracing of coastal longshore drift, estimations of mixing rates in soil or sediment, and provenance of wind‐blown deposits. The few studies that compare luminescence methods with nonluminescence tracer methods show good agreement. However, more work is needed to test the application of luminescence tracers in sediments. Future research directions should focus on comparing luminescence‐based with nonluminescence tracer methods. Furthermore, research is needed on the effects of specific geomorphic processes on luminescence characteristics and residual doses. While there is significant potential for future research, luminescence is already a useful sediment tracer and provenance tool applicable to a wide range of geomorphic environments.

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Quartz luminescence sensitivity variation in the Chinese loess deposits: the potential role of wildfires

Zhang

Sun

et al. 2022

J Quaternary Science

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The sensitivity of optically stimulated luminescence (OSL) of quartz grains has been applied to trace the provenances of sediments in various environments. Here, we studied the OSL sensitivity of quartz grains in four sections (Jingyuan, Huanxian, Xifeng and Luochuan) along a west–east transect on the Chinese Loess Plateau (CLP). The quartz OSL sensitivity in the palaeosol units is higher overall than that in the loess units, and it shows an increasing trend from the west CLP to the east CLP. In palaeosol units, it increases by a factor of ~20 along the west–east transect; while in loess units it increases by a smaller degree of 3–5. The change of provenances and the change of distances between the provenances and the loess sections cannot fully account for the large degree of sensitivity variation between the loess and palaeosol units in the central and eastern CLP. We propose that wildfires may have played an important role in enhancing the quartz OSL sensitivity in the palaeosol units in the central and eastern CLP. Quartz OSL sensitivity has the potential to be used as a proxy for palaeowildfires.

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Attaining provenance proxies from OSL and TL sensitivities: Coupling with grain size and heavy minerals data from southern Brazilian coastal sediments

Cited by 19 publications

References 31 publications

Thermoluminescence and Optically Stimulated Luminescence Measured in Marine Sediments Indicate Precipitation Changes Over Northeastern Brazil

Thermoluminescence and Optically Stimulated Luminescence Measured in Marine Sediments Indicate Precipitation Changes Over Northeastern Brazil

Luminescence as a Sediment Tracer and Provenance Tool

Quartz luminescence sensitivity variation in the Chinese loess deposits: the potential role of wildfires

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