czec republic dating service - Uranium dating zircon
Zircon (Zr Si O4) is an interesting mineral for a number of reasons.For a start it is evenly distributed within the Earth's crust.
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The dating method is usually performed on the mineral zircon.
The mineral incorporates uranium and thorium atoms into its crystal structure, but strongly rejects lead.
At present, Chemostrat can determine U-Pb ages for zircon and apatite crystals.
Zircon is a robust mineral and so the crystals preserve the age at which they formed or underwent high grade metamorphism.
and most refined of the radiometric dating schemes.
It can be used to date rocks that formed from about 1 million years to over 4.5 billion years ago with routine precisions in the 0.1–1 percent range.
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.
The four isotopes are uranium-235, uranium-238, lead-207, and lead-206.Tags: Adult Dating, affair dating, sex dating