放射年代とその信頼性  [in Japanese] Radiometric ages and its reliability  [in Japanese]

In order to estimate the age of some geological event, radiometric dating method can be used as a most powerful tool. However, the degree of uncertainties in the obtained ages varys greatly among different dating methods, the order of the obtained age, the dated materials and soon. In the present study, factors to control the uncertainty of the radiometric age are discussed in some examples. It is stressed that in recent dating techniques uncertainties in the obtained age are mostly caused due to the lack of sufficient conditions of a used sample for radiometric dating. Hence, the choice of a good material is most important to obtain a reliable radiometric age.