An improved radio fluorescence single-aliquot regenerative dose protocol for K-feldspars

作者：Frouin Marine; Huot Sebastien; Kreutzer Sebastian; Lahaye Christelle; Lamothe Michel; Philippe Anne; Mercier Norbert

来源：Quaternary Geochronology, 2017, 38: 13-24.

DOI：10.1016/j.quageo.2016.11.004

• Luminescence dating
• K-feldspars
• Radiofluorescence
• Elevated temperature

Measuring the infrared radiofluorescence (IR-RF) signal of K-feldspars, which is thought to be not affected by any anomalous fading, potentially provides a promising alternative dating approach to the more studied IR and pIRIR signals. Here we report a series of experiments aimed at characterising the IRRF signal, which led us to propose an improved IR-SAR (Infrared Radiofluorescence Single-Aliquot Regeneration) protocol. In comparison with the original protocol from Erfurt and Krbetschek (2003a), the proposed one relies on IR-RF signal measurements and bleaching experiments conducted at elevated temperatures. Stabilising the temperature at 70 degrees C during the measurements helps keeping the very shallow traps empty during the process. Internal protocol tests and dating applications are presented using known age samples. We show that the improved protocol (named RF70) is capable to reproduce known age results within uncertainties. However, considering the slow bleaching rate of the RF70 signal, the multi-grain approach is likely not the most suitable for the D-e determination of complex samples.

• 出版日期2017-3