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Heat can also reset the OSL signal, so in the case of archaeological material (pottery, bricks, ceramics, hearth stones), the event that is dated is the last time the material was heated above 300°C, e.g. OSL dating is usually performed on sand-sized grains of quartz (c.200 μm), although feldspar can also be used.The lower age limit is around 30 years, the upper limit around 100-300 thousand years, depending on the sediment.The OLD Laboratory also provides a commercial luminescence dating service and works closely with clients in industry, archaeological organizations, environmental institutes and other academic groups. The DRILL is a research laboratory dedicated to fundamental investigations in the luminescence properties of earth materials, and to the application of luminescence dating techniques to geomorphological, geological, and archeological problems.

Warming is achieved through a heating strip in an inert atmosphere obtained thanks to a continuous air extraction by a vacuum pump and following introduction of nitrogen.

This instrument is the basic and fundamental element for any thermoluminescence analysis laboratory.

Using this technique, it is possible to date many samples from archeological sites, such as ceramics, brick, hearths, fire pits, kiln and smelter walls, heat treated flint or other heat-processed materials, sand and glass.

Optical dating techniques employ ubiquitous quartz or feldspar grains to directly date the deposition of sedimentary units.

As such, the optical dating methods allow the systematic chronological evaluation of Quaternary-age sedimentary sequences.The DRILL research staff can collaborate on proposals, contribute to grant writing, and consult on study design.


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