Single grain K-feldspar MET-IRSL sediment transport determination: Bleaching patterns and rates

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-09-19 DOI:10.1016/j.quageo.2024.101626

Edward J. Rhodes , Tessa M.C. Spano , Rebecca A. Hodge , André O. Sawakuchi , Dailson J. Bertassoli Jr.

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引用次数: 0

Abstract

This paper describes ways that Infra-Red Stimulated Luminescence (IRSL) signals from K-feldspar grains can be used to determine patterns and rates of sediment transport. In particular, it focusses on the potential provided by single grains to reveal their individual exposure and burial histories by the application of multiple elevated temperature (MET) IRSL measurements. We examine similarities and differences in bleaching behaviour with different light sources and introduce the concept of an equilibrium bleach. We present data on the variability of bleaching parameters for grains from single sediment samples, and discuss different analysis approaches to best determine individual grain histories. We describe a single grain “bleach recovery” experiment, and the application of a combined growth-bleach protocol designed to allow optimal data collection of both aspects of grain behaviour. We discuss the development of a burial-bleach model using numerical simulations based on direct observations of sample characteristics.

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单粒 K 长石 MET-IRSL 沉积物运移测定：漂白模式和漂白率

本文介绍了利用钾长石晶粒的红外激发发光（IRSL）信号来确定沉积物迁移模式和速率的方法。特别是，它侧重于通过应用多个高温（MET）IRSL 测量来揭示单个晶粒的暴露和埋藏历史。我们研究了不同光源下漂白行为的异同，并引入了平衡漂白的概念。我们提供了单个沉积物样本中漂白参数的变化数据，并讨论了不同的分析方法，以最好地确定单个谷物的历史。我们介绍了单个谷物的 "漂白恢复 "实验，以及生长-漂白组合方案的应用，该方案旨在对谷物行为的两个方面进行最佳数据收集。我们讨论了在直接观察样品特征的基础上，利用数值模拟开发埋藏-漂白模型的情况。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.