Like Potassium, Argon cannot be significantly fractionated in nature. Likewise, potassium has not been gained or lost. Because the relative abundances of the potassium isotopes are known, the 39ArK produced from 39K by a fast neutron reaction can be used as a proxy for potassium. Other isotopes of argon are produced from potassium, calcium, argon and chlorine.
For example, to determine the amount of reactor produced 40Ar from 40K, potassium-rich glass is irradiated with the samples. Some of these include other isotopic dating techniques e. Recoil is likely in every potassium-bearing sample, but only becomes a significant problem with very fine grained minerals e.
In this case, 39Ar may recoil out of a low-temperature, high-potassium mineral e. K-feldspar into a high-temperature, low potassium mineral e.
Potassium–argon dating, abbreviated K–Ar dating, is a radiometric dating method used in geochronology and archaeology. It is based on measurement of the product of the radioactive decay of an isotope of potassium into argon. Potassium–argon dating, abbreviated K–Ar dating, is a radiometric dating method used in geochronology and archaeology. It is based on measurement of the. One of the most widely used dating methods is the potassium-argon method, which has been applied to 'dating' rocks for decades, especially. Potassium-argon dating definition, a method for estimating the age of a mineral or rock, based on measurement of the rate of decay of radioactive potassium into.