Dating with uranium-lead

The dating with uranium-lead is a radiometric method of Datation like the method uranium-thorium, the Carbon-14 or the Thermoluminescence.

The natural Uranium is made mainly of two Isotopes, $\{\}\; \_\; \{92\}\; ^\; \{235\}\; \backslash \; rm\; \{U\}$ and $\{\}\; \_\; \{92\}\; ^\; \{238\}\; \backslash \; rm\; \{U\}$. The isotope $\{\}\; \_\; \{92\}\; ^\; \{234\}\; \backslash \; rm\; \{U\}$ is present in quantity smaller, but measurable, usually by mass spectrometry (TIMS), or by ICP-MS multicollection. The other isotopes of uranium are not known in the normal terrestrial samples (excluding the natural engine from Oklo), they are produced in nuclear reactors, but are used like " spike" or tracers in the method of proportioning of uranium by isotopic dilution.

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