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中国沙漠 ›› 2026, Vol. 46 ›› Issue (2): 222-232.DOI: 10.7522/j.issn.1000-694X.2025.00188

• • 上一篇    

便携式释光仪测试的影响因素和使用条件研究——以风成沉积物为例

王庆铎1,2(), 刘剑刚1, 安萍2, 刘富栋1,2, 吕荫1,2, 于禄鹏2()   

  1. 1.辽宁师范大学 地理科学学院 光释光实验室,辽宁 大连 116029
    2.临沂大学 资源环境学院 释光年代学实验室,山东 临沂 276000
  • 收稿日期:2025-10-14 修回日期:2025-11-13 出版日期:2026-03-20 发布日期:2026-04-13
  • 通讯作者: 于禄鹏
  • 作者简介:王庆铎(1999—),男,山东济宁人,硕士研究生,主要从事释光年代学与环境变化研究。E-mail: wangqd315@163.com
  • 基金资助:
    国家自然科学基金项目(42371020);国家自然科学基金项目(41761144073);泰山学者项目(tsqn202408266);辽宁省教育厅高校基本科研项目(LJ212410165016)

Study on factors affecting measurement and usage conditions of portable optically stimulated luminescence reader: a case study of aeolian sediments

Qingduo Wang1,2(), Jiangang Liu1, Ping An2, Fudong Liu1,2, Yin Lv1,2, Lupeng Yu2()   

  1. 1.Luminescence Research Laboratory,School of Geography,Liaoning Normal University,Dalian 116029,Liaoning,China
    2.Luminescence Research Laboratory,College of Resources and Environment,Linyi University,Linyi 276000,Shandong,China
  • Received:2025-10-14 Revised:2025-11-13 Online:2026-03-20 Published:2026-04-13
  • Contact: Lupeng Yu

摘要:

释光测年是第四纪沉积物常用的测年手段,根据其原理发展起来的便携式释光仪可在野外获取样品的天然释光信号信息,用于地层和年代等方面的分析。在测试中哪些因素会对测试结果产生影响成为评估测试可靠性、提高测试效率的重要问题。本研究从多个区域选取了样品均一度高、信号晒退较好的风成沉积物进行一系列潜在影响因素的试验。结果表明:不同地区的便携释光信号由不同矿物主导,中国北方的风沙沉积物通常由长石主导;便携释光信号受粒径影响,可能与矿物组成差异有关;测试结果受样品有效面积影响,不受样品的质量、厚度、摆放位置影响;实验可重复性好,无需重复测试;干旱区样品含水量的影响可忽略;非日光直射下的短期曝光对便携释光信号的影响较小,在野外可实现简单避光条件下的直接采样和测试。因此,使用便携式释光仪进行测试时基本无需对样品进行特殊处理,尤其是粒径组成和矿物成分均匀的风成沉积物样品,其信号变化与年代的相关性更高。

关键词: 释光测年, 便携式释光仪, 中国北方风成沉积, 等效剂量

Abstract:

Luminescence dating is a widely used method for Quaternary sediments. The portable optically stimulated luminescence reader, developed based on this principle, enables in-situ measurements of natural luminescence signals from samples in the field, facilitating stratigraphy and chronological analyses. Understanding factors affecting measurements is key for evaluating the reliability of testing and enhancing operational efficiency. In this study, we conducted a series of experiments to evaluate potential influencing factors using well-bleached and homogeneous aeolian sediments. The results indicate that portable luminescence signals are dominated by different minerals across regions, with feldspar being the primary contributor in aeolian sediments from northern China. The portable luminescence signal is influenced by grain size, which could be associated with differences in mineral composition. The measurements are influenced by the effective area of the sample but remain unaffected by sample mass, thickness, or placement orientation. The experiments show high reproducibility, obviating the necessity for repeated measurements. The influence of sample water content in arid regions is neglected; Brief exposure to indirect sunlight has little effect on portable signals, allowing for field sampling and testing under similar lighting conditions. Hence, portable luminescence measurements generally require no special sample preparation, particularly for aeolian deposits with homogeneous grain size and mineralogical composition, for which luminescence signal variations show a closer correlation with sedimentary age.

Key words: luminescence dating, portable OSL reader, aeolian sediments in northern China, equivalent dose

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