Radiometric dating rock samples

16-Sep-2017 07:18

So accurate determinations require very pure samples, very accurate and selective detectors, or both.

The true age of a sample is self-explanatory, but unless the material dates from historic times, the true age is rarely known.

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Argon, an inert gas, is not chemically bonded to neighboring atoms at all, and even minor thermal disturbance allows them to escape.Crystallization of a mineral is a good way to close a system. Any disturbance of the system effectively resets the clock to zero by allowing decay products to escape or reshuffling the abundances of elements.

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