Ar ar dating minerals
However, in a metamorphic rock that has not exceeded its closure temperature the age likely dates the crystallization of the mineral. This method is important as it allows crystals forming and cooling during different events to be identified. Some of the problems of K-Ar dating can be avoided by the use of the related Ar-Ar dating method.
Modern methods of analysis allow individual regions of crystals to be investigated. Thus, discretion and interpretation of age dating is essential. Thus, although a crystallization age is not recorded, the information is still useful in constructing the thermal history of the rock. In this article we shall explain how this method works and why it is superior to the K-Ar method.
So now we know J, and we have measured the R-value of the sample we're actually interested in dating, so we can use these data to solve the equation for t, giving us the age we're looking for. If we don't get the same date at each step, then we may be able to work out what's going on.
Jump to navigation Jump to search Ultrapure argon glowing in a plasma lamp. However, there are advantages to this more complex method. This isotope of argon is quite unstable, having a half-life of only years.
And if the dates we get are all over the place, then we are probably looking at excess argon. The Ar-Ar dating method relies crucially on the existence of two other isotopes. Now the bad news is that there is no way we can somehow manipulate this data to give us a correct date for the sample.
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