讲座题目：Luminescence of quartz and feldspar to shed light on changes in the Amazon fluvial system during the Quaternary
主讲人：André Oliveira Sawakuchi 教授
主持人：张卫国 研究员
开始时间：2025-11-1 10:00
讲座地址：闵行校区河口楼A204
主办单位：河口海岸全国重点实验室
报告人简介：
André Oliveira Sawakuchi博士现任圣保罗大学地球科学学院终身教授，释光与伽马能谱实验室负责人，国际大陆科学钻探计划（ICDP）亚马孙钻探项目巴西首席科学家，并获巴西国家科学与技术发展委员会（CNPq）授予的科学生产力津贴。他的主要研究方向包括：释光技术在沉积物源示踪与年代测定中的应用、亚马孙地区的地质演化、气候变化与生物多样性之间的关系，以及水电开发对亚马孙河流域的影响。近年来，他以通讯作者或第一作者身份在 Nature Communications、Nature Reviews Biodiversity、Reviews of Geophysics、Earth and Planetary Science Letters 等国际顶级学术期刊发表多篇论文。
报告内容：
The Amazon landscape is shaped by the activity of large transcontinental rivers with flowing waters supplied by the South American Monsoon System. The talk will focus on the application of luminescence of quartz and feldspar to determine deposition ages and sources of sediments transported and deposited by the Amazon River and its tributaries during the Quaternary. We will discuss limits and constraints of using quartz and feldspar luminescence for chronology of river terraces across lowland Amazon. We will also explore the use of quartz optically stimulated luminescence (OSL) sensitivity to trace sediment sources of the Amazon River sediments. We will discuss the discrimination between orogenic Andean sediments and cratonic sediments using quartz OSL sensitivity as well as the surface processes and climate changes that can be traced. An example of fluvial landscape changes reconstructed through luminescence methods and their relation with Amazon forest types will be presented.
