Dating method based on rate of decay of radioactive isotopes Vs system flirt4

18-Nov-2017 09:24

The amount of 14C present and the known rate of decay of 14C and the equilibrium value gives the length of time elapsed since the death of the organism.This method faces problems because the cosmic ray flux has changed over time, but a calibration factor is applied to take this into account.For an element to be useful for geochronology (measuring geological time), the isotope must be reasonably abundant and produce daughter isotopes at a good rate.Either a whole rock or a single mineral grain can be dated.

The unstable or more commonly known radioactive isotopes break down by radioactive decay into other isotopes.

This technique is used on ferromagnesian (iron/magnesium-containing) minerals such as micas and amphiboles or on limestones which also contain abundant strontium.

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