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With all radiometric dating processes, the accuracy of uranium-lead dating is called into question.Some of the classic problems with this kind of dating process include what the process can really date, how far the radiometric process can date accurately, and the assumptions taken so the dating process works.The radiometric dater then uses the half-life of all four isotopes to find an age range the rock should be in.

The reason for stopping at lead is because lead is not radioactive and will not change into a different element.

It may sound straight-forward, but there are many variables that have to be considered.

Once all these assumptions are taken, the equation above simplifies to .

Without a closed system, uranium-lead dating, like all other radiometric dating methods, falls apart.

Most radiometric daters prefer using zircon for these reasons, but it is not the only compound used for uranium-lead dating.

Some other compounds used that have zirconium are zirconolite, and badeleyite.It also implies that none of the factors that might affect the rate of the radioactive decay could not. If the ages this dating process generates are true, it gets harder to assume that nothing on the outside of the sample has any effect on the system.After a few million or billion years of a near-closed system, it will have a large error.The three main parameters that have to be set are the original amount of uranium and lead in the sample, the rate at which uranium and lead enter and leave the sample, and how much the rate of decay changes.Uranium-lead dating uses four different isotopes to find the age of the rock.From what has been observed, even small amounts of rock metamorphosis should not disturb the elements in the zircon.

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