The U-Pb concordia-discordia method the most effective and dependable methods that are dating.

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The U-Pb concordia-discordia method the most effective and dependable methods that are dating.

It’s particularly resistant to heating and events that are metamorphic therefore is incredibly beneficial in rocks with complex records. Very often this process can be used with the K-Ar while the isochron that is rb-Sr to unravel a brief history of metamorphic stones, because each one of these techniques reacts differently to metamorphism and heating. As an example, the U-Pb discordia age might provide the chronilogical age of initial formation associated with stone, whereas the K-Ar technique, that will be specially sensitive to argon loss by heating, might provide the chronilogical age of the heating event that is latest.

An example of A u-pb discordia age is shown in Figure 5.