# What is uranium dating used for bald head dating

The benefits of using zircon is that the trapping temperature is 900 C.

This temperature makes the zircon hard to pull out substances out of it.

For Uranium-Lead dating to work, scientists have to make three assumptions.

These assumptions are that the system being dated is a closed system; at the beginning of the time period, there are no daughter isotopes present; and the rate of radioactive decay stays the same through the whole time period.

One assumption is to use a worldview that uniformitarianism is accepted Where is the time from starting point, the original amount of uranium, the amount of uranium at the measurement, the original amount of lead, the amount of lead at the measurement, the rate uranium changes to lead, the average rate of loss and gain in the amount of lead, the average rate of loss and gain in the amount of uranium..

Like all radiometric dating methods, uranium-lead dating has a range that it works best.

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.

This fact helps with extracting the zircon out of the rock it was in.

This data is compared to a curve called the Concordia diagram.

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.

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.