Uses of uranium dating
Other compounds that do not contain zirconium but are commonly used for this method are titanite, and monazite.
Since most radiometric daters prefer using zircon for this process, geologists often call uranium-lead dating zircon dating.
The four isotopes are uranium-235, uranium-238, lead-207, and lead-206.
The process of dating finds the two ratios between uranium-235 and lead-207; and uranium-238 and lead-206.
The radiometric dater then uses the half-life of all four isotopes to find an age range the rock should be in.
This diagram has been made by using the ratio of uranium to lead of all the rocks dated with this method and their assumed age.
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.
Scientists know that there are geological events that can disturb the zircon and release the lead created from the uranium. To try to account for this, a radiometric dater will use many different samples and use the ones that fit the Concordia curve.
If they do not fit, it is assumed that it signifies a large geological event The part of the rock a dater will use to date the rock is normally the zircon in the rock.