Zircon dating techniques

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The nitty gritty on radioisotopic dating Radioisotopic dating is a key tool for studying the timing of both Earth's and life's history. Radioactive decay Radioisotopic dating relies on the process of radioactive decay, in which the nuclei of radioactive atoms emit particles. This releases energy in the form of radiation and often transforms one element into another. For example, over time, uranium atoms lose alpha particles each made up of two protons and two neutrons and decay, via a chain of unstable daughters, into stable lead.

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Uranium — Lead dating is the geological age-determination method that uses the radioactive decay of uranium U isotopes U, U, and also in this entry Th into stable isotopes of lead Pb Pb, Pb, and Pb, respectively.

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September 16, A new study by geologists at the Berkeley Geochronology Center and the University of California, Berkeley, improves upon a widely used dating technique, opening the possibility of a vastly more accurate time scale for major geologic events in Earth's history. To date, zircons - known to many as a semiprecious stone and December's birthstone - have often produced confusing and inaccurate results.

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