The application of radiofluorescence dating (IR-RF) on loess

放射性荧光测年（IR-RF）在黄土上的应用

基本信息

批准号：
264769390
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
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/264769390?language=en
关键词：
application radiofluorescence dating IR RF

项目摘要

Loess and its paleosols represent important sedimentary archives for investigating Quaternary paleoenvironments. However, to interpret these archives, a robust chronostratigraphy is of crucial importance and luminescence dating techniques play a major role in establishing these chronostratigraphies. So far, dominantly loess from the last glacial/interglacial cycle was successfully dated by luminescence dating, caused by specific mineral characteristics and due to methodological problems of the applied luminescence dating techniques. An alternative and innovative approach is represented by the infrared radiofluorescence dating technique (IR/RF), which enables the dating of sediments far beyond the last glacial-interglacial cycle. However, even though the IR/RF dating technique could already successfully be applied to various sediment types, its routine application is not given and the development of a reliable IR/RF dating protocol is challenging. Therefore, basic questions in respect to the behavior of the IR/RF signal to individual measurement parameters need to be answered, a prerequisite to develop a robust measurement protocol for IR/RF dating. Here we apply for a project, which focus on establishing the IR/RF dating technique for coarse grain K-feldspar of loess (> 63 µm). Therefore, different measurements parameters and their impact on the IR/RF dating results will be investigated, to develop a reliable IR-RF measurement protocol. The second objective of this application is the development of a new IR-RF dating protocol for polymineral fine grain loess samples (4 to 11 µm). Because both IR/RF dating techniques, the technique for coarse-grain K Feldspar and polymineral fine grain samples, have a great potential for the dating of loess deposits from the late to middle Pleistocene, the development of the new methods will use loess material from the late to middle Pleistocene, for which already independent age control exists.

Loess及其古物代表了研究第四纪古环境的重要沉积档案。但是，要解释这些档案，强大的年度地层学具有至关重要的重要性，而发光约会技术在建立这些年度地层学方面起着重要作用。到目前为止，从最后一个冰川/冰川间周期中占据主导地位，是由发光日期成功地通过了特定矿物特征引起的，并且由于所施加的发光测年技术的方法论问题。一种替代和创新的方法由红外射线荧光约会技术（IR/RF）表示，这使沉积物的日期远远超出了最后一个冰川间冰期循环。但是，即使IR/RF约会技术已经可以成功地应用于各种沉积物类型，但也没有提供常规应用，并且开发可靠的IR/RF约会协议是挑战。因此，需要回答有关IR/RF信号对单个测量参数的行为的基本问题，这是为IR/RF定期制定可靠的测量协议的先决条件。在这里，我们申请一个项目，该项目着重于建立黄土的粗粒k-feldspar（> 63 µm）的IR/RF约会技术。因此，将研究不同的测量参数及其对IR/RF年期结果的影响，以制定可靠的IR-RF测量协议。该应用的第二个目标是开发针对聚合谷物谷物面包样品的新的IR-RF约会方案（4至11 µm）。由于IR/RF约会技术，粗粒k feldspar和多官方细晶粒样品的技术都有很大的潜力，可以将巨大的沉积物从后期到中新世中期到中期，因此新方法的开发将使用来自后期至中期新世代的黄土材料，该材料已经独立的年龄控制存在。