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Uranium-lead dating

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The following radioactive decay processes have proven particularly useful in radioactive dating for geologic processes:. Note that uranium and uranium give rise to two of the natural radioactive series , but rubidium and potassium do not give rise to series. They each stop with a single daughter product which is stable. Some of the decays which are useful for dating, with their half-lives and decay constants are:. The half-life is for the parent isotope and so includes both decays. Some decays with shorter half-lives are also useful.
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Difference Between Carbon Dating and Uranium Dating

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Lead–lead dating - Wikipedia

Uranium—lead dating , abbreviated U—Pb dating , is one of the oldest [1] and most refined of the radiometric dating schemes. It can be used to date rocks that formed and crystallised from about 1 million years to over 4. The method is usually applied to zircon. This mineral incorporates uranium and thorium atoms into its crystal structure , but strongly rejects lead when forming. As a result, newly-formed zircon deposits will contain no lead, meaning that any lead found in the mineral is radiogenic. Since the exact rate at which uranium decays into lead is known, the current ratio of lead to uranium in a sample of the mineral can be used to reliably determine its age.
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Radiometric dating

Uranium—lead U—Pb dating is one of the oldest [1] 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. The uranium—lead dating method relies on two separate decay chains , the uranium series from U to Pb, with a half-life of 4.
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Uranium—lead U—Pb dating is one of the oldest [ 1 ] and most refined of the radiometric dating schemes, with a routine age range of about 1 million years to over 4. These decay routes occur via a series of alpha and beta decays, in which U with daughter nuclides undergo eight total alpha and six beta decays whereas U with daughters only experience seven alpha and four beta decays. The existence of two 'parallel' uranium-lead decay routes U to Pb and U to Pb leads to multiple dating techniques within the overall U—Pb system.
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