Quartz osl dating
It is exposed again to radiation and accumulates trapped electrons.
Much later the grain is sampled in the field and stimulated in the laboratory using either visible light for quartz (OSL As shown in fig.
The paper then explains how OSL dating is applied to obtain a depositional age, through the field and laboratory procedures employed.
These procedures are described as clearly as possible in order to provide useful information for geomorphologists interested in the method, and illustrated by a case study that has involved luminescence dating of fluvial sands (samples LUM 975 and LUM 978) from the lower alluvial terrace of the Moselle River (M1 terrace as defined by S. However, it is essential to keep in mind that the protocols (preparation of the sediments, measurements) may vary from one laboratory to the other: the presentation does not aim to be exhaustive, but to reference the main procedures at each step of the dating.
On the contrary, defects situated deeper inside the lattice have a higher thermal lifetime.
These “deep traps” (stable traps associated with high energy levels) can adequately be used for dating.
This results in the release of trapped electrons (“bleaching”) and the emission of the luminescence signal.
The recombination generates the emission of light (the luminescence signal) which can be measured in laboratory through heating (for TL) or through light stimulation for OSL (Huntley ., 1985).Improvements of this technique led to the development, for more than twenty years, of the optical dating method [commonly referred to as Optically Stimuled Luminescence (OSL)] which is now applied to sediments from various origins (Wintle, 2008).