Dating uranium

Posted by / 19-Jul-2016 04:09

Zircon is especially useful because it frequently contains uranium in substitution for zirconium, but does not incorporate lead (as shown by the absence of Lead-204).Thus all the lead in the zircon can be assumed to be radiogenic.Uranium minerals themselves are too uncommon to be very useful in dating.

The uranium and thorium decay systems offer a multitude of radiometric dating options.Uranium 238 decays through a series of steps to Lead 206.Uranium 235 decays to lead 207, and Thorium 232 decays to lead 208.In addition there is another stable isotope, lead 204, that is entirely primordial and does not form via radioactive decay at all.Thus any of the radioactive isotopes and its lead daughter product can be used for dating, or a combination may be used.

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In addition, some of the longer-lived intermediate daughter products have uses in dating.

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