Radiometric dating applied metamorphic rocks mormon dating culture
Isotopic systems that have been exploited for radiometric dating have half-lives ranging from only about 10 years (e.g., , whose decay rate may be affected by local electron density.For all other nuclides, the proportion of the original nuclide to its decay products changes in a predictable way as the original nuclide decays over time.The use of radiometric dating was first published in 1907 by Bertram Boltwood and is now the principal source of information about the absolute age of rocks and other geological features, including the age of fossilized life forms or the age of the Earth itself, and can also be used to date a wide range of natural and man-made materials.
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This predictability allows the relative abundances of related nuclides to be used as a The basic equation of radiometric dating requires that neither the parent nuclide nor the daughter product can enter or leave the material after its formation.
The possible confounding effects of contamination of parent and daughter isotopes have to be considered, as do the effects of any loss or gain of such isotopes since the sample was created.
On the other hand, the known radiometric dates do suggest ages for the major episodes of metamorphism and deformation of the metamorphic complex, although somewhat hypothetical.
A brief discussion is presented in the last section of this chapter, "Metamorphic events and tectonic evolution." Table 1 is a summary of the published isotopic ages of the metamorphic rocks in the basement complex.
A particular isotope of a particular element is called a nuclide. That is, at some point in time, an atom of such a nuclide will spontaneously transform into a different nuclide.