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

IF 1.7 2区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary Geochronology 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

Quaternary Geochronology 地学-地球化学与地球物理

CiteScore

4.40

自引率

22.20%

发文量

130

审稿时长

20 weeks

期刊介绍： Quaternary Geochronology is an international journal devoted to the publication of the highest-quality, peer-reviewed articles on all aspects of dating methods applicable to the Quaternary Period - the last 2.6 million years of Earth history. Reliable ages are fundamental to place changes in climates, landscapes, flora and fauna - including the evolution and ecological impact of humans - in their correct temporal sequence, and to understand the tempo and mode of geological and biological processes.