Establishing a pIRIR procedure for De determination of composite mineral grains from volcanic terranes: A case study of sediments from Liang Bua, Indonesia

Sontag-González, Mariana; Li, Bo; O’Gorman, Kieran; Sutikna, Thomas; Jatmiko, Jatmiko; Jacobs, Zenobia

doi:10.1016/j.quageo.2021.101181

Cited by 11 publications

(7 citation statements)

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“…Methods involving isolation of the fast-decay signal in quartz used for dating (e.g., Bulur et al, 2000;Ballarini et al, 2007;Bailey, 2010;Cunningham and Wallinga, 2010;Durcan and Duller, 2011;Combès and Philippe, 2017) and infrared stimulated luminescence (IRSL) signals with lower (Thomsen et al, 2008;Buylaert et al, 2009) or negligible (Thiel et al, 2011;Li and Li, 2011;Lamothe et al, 2020) fading rates in feldspar have been developed, but tectonically active settings remain challenging to date. Feldspars may be dim and insensitive in volcanic regions when the sediments are dominated by Ca or Na feldspars, which are often not removed in density separation because the grains contain intergrown minerals (Sontag-González et al, 2021). Researchers working in volcanic-sourced terrane and active orogens would be well served to discuss research objectives and sample-selection goals with luminescence laboratory personnel prior to project design, application for funding, and sample collection.…”

Section: Geologic Source and Luminescence Sensitivitymentioning

confidence: 99%

“…Sources of error include imperfect correction of sensitivity changes across measurement cycles and different radiation conditions between the laboratory and nature, such as the rate of irradiation (laboratory dose rates are delivered at a rate ∼10 8 -10 9 greater than natural rates). Other uncertainties may also arise if the measured signals have unwanted physical properties, such as thermal instability (Sontag-González et al, 2021;Liu et al, 2019) and fading (Wintle, 1973).…”

Section: Precision Accuracy and Sources Of Uncertaintymentioning

confidence: 99%

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Guide for interpreting and reporting luminescence dating results

et al. 2022

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The development and application of luminescence dating and dosimetry techniques have grown exponentially in the last several decades. Luminescence methods provide age control for a broad range of geological and archaeological contexts and can characterize mineral and glass properties linked to geologic origin, Earth-surface processes, and past exposure to light, heat, and ionizing radiation. The applicable age range for luminescence methods spans the last 500,000 years or more, which covers the period of modern human evolution, and provides context for rates and magnitudes of geological processes, hazards, and climate change. Given the growth in applications and publications of luminescence data, there is a need for unified, community-driven guidance regarding the publication and interpretation of luminescence results. This paper presents a guide to the essential information necessary for publishing and archiving luminescence ages as well as supporting data that is transportable and expandable for different research objectives and publication outlets. We outline the information needed for the interpretation of luminescence data sets, including data associated with equivalent dose, dose rate, age models, and stratigraphic context. A brief review of the fundamentals of luminescence techniques and applications, including guidance on sample collection and insight into laboratory processing and analysis steps, is presented to provide context for publishing and data archiving.

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Section: Geologic Source and Luminescence Sensitivitymentioning

confidence: 99%

Section: Precision Accuracy and Sources Of Uncertaintymentioning

confidence: 99%

Guide for interpreting and reporting luminescence dating results

et al. 2022

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“…Since the rejection criteria for the SAR and SGC methods were the same, 88 grains from subset A were used for the SGC construction and subsequent De calculation using the constructed SGCs. The goodness-of-fit of the SGC can be evaluated using the In previous papers the agreement of SAR and SGC results was based on their De values ± their 2 σ standard error (e.g., Li et al, 2015a,b;Sontag-González et al, 2021). When reporting luminescence ages the 1 σ standard error is commonly used (Mahan et al, 2022).…”

Section: Resultsmentioning

confidence: 99%

“…Single-grain measurements of feldspars can be challenging and time-consuming, particularly when only a small percentage of grains emits suitable luminescence signals (e.g. Brill et al, 2018;O'Gorman et al, 2021;Sontag-González et al, 2021;Zinelabedin et al, 2022). In such cases many SG discs have to be measured before a sufficient number of grains has been obtained to calculate a robust palaeodose.…”

Section: Introductionmentioning

confidence: 99%

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Testing the applicability of standardised growth curves (SGC) for chemically heterogeneous single-grain feldspars from the Atacama Desert, Chile

Maßon,

Riedesel,

Zander

et al. 2023

Preprint

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The Atacama Desert is generally considered the driest non-polar desert on Earth and is therefore an ideal study area for exploring the water and biota free endmember of Earth’s Critical Zone (ECZ). Single grain (SG) luminescence dating has successfully identified processes in the ECZ. However, SG luminescence dating of Atacama Desert feldspars is challenging and time consuming since only a small fraction of grains emits sufficient luminescence and their potassium (K) contents, needed for internal dose rate calculations, are highly variable. Here we present an adaption of the standardised growth curve (SGC) method adjusted to the conditions of Atacama Desert sediments and a correlation of single-grain geochemistry and luminescence properties. To evaluate if SGCs are suitable for our study site and to determine the influence of the K-content on our luminescence age calculations, we used a set of five samples from the Atacama Desert and five chemically and structurally different feldspar sediment extracts from various geological origins worldwide. We performed a dose recovery test (DRT) using a post-infrared infrared stimulated luminescence (pIRIR) protocol and measured nine major element concentrations, including K, on a single grain level using a scanning electron microscope (SEM) with energy-dispersive X-ray spectroscopy (EDX). The DRT dataset was then used to test the application of SGCs. The accuracy of Atacama feldspar pIRIR measurements fitted onto SGCs frequently suffers from outliers in single measurement cycles. We investigate the influence of calculating a synthetic regenerative signal (sR) for SGC fitting, to reduce the effect of outliers on individual grain measurements. Furthermore, we reduced the regenerative cycles (rc) used for our sR approach, to test if shorter protocols would result in equivalent dose (De) estimates in agreement with longer protocols. We then calculated Spearman rank correlations between the results obtained with our modified SGC and the SAR protocol, luminescence signal intensities, and the geochemical dataset. Finally, we present a new method of fitting data onto a SGC which significantly decreases measurement time, without risking the inclusion of outliers. We furthermore show that the luminescence signal intensities, the De values and their dose recovery ratios obtained with our SGC method and a SAR protocol, are independent of the sample geochemistry.

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Thermal trap stability determined by the pulse annealing experiments with variable heating rates

Witkowski,

Chruścińska

2025

Measurement

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Establishing a pIRIR procedure for De determination of composite mineral grains from volcanic terranes: A case study of sediments from Liang Bua, Indonesia

Cited by 11 publications

References 58 publications

Guide for interpreting and reporting luminescence dating results

Guide for interpreting and reporting luminescence dating results

Testing the applicability of standardised growth curves (SGC) for chemically heterogeneous single-grain feldspars from the Atacama Desert, Chile

Thermal trap stability determined by the pulse annealing experiments with variable heating rates

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