Optically stimulated luminescence osl dating
OSL works because all sediments have some natural radioactivity, caused by the presence of uranium, thorium and potassium isotopes in heavy minerals such as zircons. We analyse the quartz or feldspar minerals in sand deposits.
Mrozik, A., Bilski, P., Marczewska, B., Obryk, B., Hodyr, K., and Gieszczyk, W. Radio-photoluminescence of highly irradiated Lif: Mg, Ti and Lif: Mg, Cu, P detectors. Show more »OSL dating can be used to determine the time since naturally occurring minerals, such as quartz and feldspar, were last exposed to light within the last few hundreds of thousands of years.It is one of the main methods used to establish the timing of key events in archaeology and human evolution, landscape and climate change, and palaeobiology in the latter half of the Quaternary.This page was contributed by Dr Georgina King from the Aberystwyth Luminescence Research Laboratory in the Institute for Geography and Earth Sciences. OSL is used on glacial landforms that contain sand, such as sandur or sediments in glacial streams. | Calculating Age | Challenges for OSL | Case studies of OSL dating in glacial environments | References | Comments | Another way of dating glacial landforms is optically stimulated luminescence dating (OSL).
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This can be measured either at the sample location using a portable gamma spectrometer, through measurement of alpha, beta and gamma counts in the laboratory, or through direct measurement of uranium, thorium and potassium concentrations using inductively-coupled plasma mass spectrometry.