Radiometric dating metamorphic rocks

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An event like metamorphism could heat the crystal to the point where Pb will become mobile.Another possible scenario involves U leakage, again possibly as a result of a metamorphic event.Together with stratigraphic principles, radiometric dating methods are used in geochronology to establish the geologic time scale.Among the best-known techniques are radiocarbon dating, potassium–argon dating and uranium–lead dating.

and is now the principal source of information about the absolute age of rocks and other geological features, including the age of fossilized life forms or the age of the Earth itself, and can also be used to date a wide range of natural and man-made materials.This transformation may be accomplished in a number of different ways, including alpha decay (emission of alpha particles) and beta decay (electron emission, positron emission, or electron capture).Another possibility is spontaneous fission into two or more nuclides.We can also construct a Concordia diagram, which shows the values of Pb isotopes that would give concordant dates.The Concordia curve can be calculated by defining the following: ).

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