Radiometric dating simulation

Posted by / 28-Mar-2020 20:25

Measurement of the concentrations of different isotopes is carried out with a mass spectrometer.

The first step in this technique is the irradiation of the sample by neutron bombardment to form 39 Ar from 39 K occurring in the rock.The ratio of 39 K to 40 K is a known constant so if the amount of 39 Ar produced from 39 K can be measured, this provides an indirect method of calculating the 40 K present in the rock.Measurement of the 39 Ar produced by bombardment is made by mass spectrometer at the same time as measuring the amount of 40 Ar present.It is also possible to use it on authigenic minerals, such as glauconite, in some sedimentary rocks.Radiometric dating of minerals in metamorphic rocks usually indicates the age of the metamorphism.

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