Thermoluminescence dating labs

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The Alligator Rivers Region Research Institute housed one of five thermoluminescence (TL) dating laboratories operating in Australia.

The laboratory was established in 1985 to assist geomorphological research into uranium mining activities in the Region.

For unheated sediments, the TL clock is reset by exposure to sunlight, but an unbleachable (residual) TL signal remains even after prolonged exposure.

The residual TL signal at the time of sediment deposition was estimated from ED determinations on modern (surface and near-surface) deposits, again following Readhead (1984, 1988).

The lab is based in Miami, Florida, and is the world leader in Carbon-14 analyses since 1979.

Read More Choosing a radiocarbon dating laboratory is not always easy; there are many factors to consider and often budgetary constraints to negotiate.The method utilises the tiny light signal (the luminescence) emitted from mineral grains when they are exposed to light (the optical stimulation).This signal is built up through the absorption of energy from ionising radiation, emitted from radioisotopes that are present in natural sediment.C dating, thermoluminescence is related to radioactive decay.Thermoluminescence is produced by radioactive decay particles (electrons), trapped in mineral grains.

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