Radiofluorescence dating (IR-RF): Towards a suitable dating method for quaternary sediments.

放射性荧光测年（IR-RF）：寻找适合第四纪沉积物的测年方法。

• 批准号: 437030548
• 负责人: Professor Dr. Markus Fuchs
• 金额: --
• 依托单位: Bereich Physische Geographie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/437030548?language=en
• 关键词: Radiofluorescence; dating; IR; RF; Towards

In Quaternary and paleoenvironmental sciences, sediments represent an important natural archive for reconstructing past climates and their environments. In this context, the establishment of numerical chronologies is of crucial importance, because they (1) allow to date the paleoenvironmental period and event of interest, (2) give insight into past dynamics of climate and paleoenvironmental change, and they (3) allow to correlate between different environmental archives. To successfully establish the needed numerical chronologies, luminescence dating techniques are of major importance.Luminescence dating techniques are dominantly applied to sediments of the Late Quaternary, whereas sediments of the Middle Quaternary are due to methodological challenges, so far difficult to date. An alternative and innovative dating approach is represented by infrared-radiofluorescence (IR-RF) of feldspars, which could successfully be applied in preliminary studies to sediments of various environmental settings. During preliminary studies by the applicant, various technical and methodological problems of the IR-RF dating method could be solved, but also new methodological challenges arose.In this proposal, the applicant will deal with the still open, as well as the newly arose methodological challenges, to establish a suitable IR-RF dating protocol for Quaternary sediments. The protocols are thought to be developed for the monomineralic coarse grain fraction (> 63 µm), as well as for the polymineralic fine grain fraction (4-11 µm). The suitability of the developed protocols will be tested and validated against sediment samples with independent age control.

在第四纪和古环境科学中，沉积物代表了重建过去气候及其环境的重要自然档案，在这种情况下，建立数值年代学至关重要，因为它们（1）可以确定古环境时期和感兴趣的事件的年代。 （2）深入了解气候和古环境变化的过去动态，并且（3）允许在不同的环境档案之间建立关联。为了成功建立所需的数值年表，发光测年技术至关重要。发光。测年技术主要应用于晚第四纪的沉积物，而中第四纪的沉积物则由于方法上的挑战，迄今为止很难确定日期。另一种创新的测年方法是长石的红外辐射荧光（IR-RF），在申请人的初步研究过程中，红外-射频测年方法的各种技术和方法问题得到了解决，但也出现了新的方法学挑战。在该提案中，申请人将应对仍然悬而未决的问题以及新出现的方法学挑战，以建立适合第四纪沉积物的红外-射频测年协议。该协议被认为是针对单矿物粗粒部分（> 63）开发的。 µm），以及多矿物细粒部分（4-11 µm）。将针对具有独立年龄控制的沉积物样品来测试和验证所开发方案的适用性。