Introduction to Basic Principles and Applications of Isochron ~(26)Al/~(10)Be Burial Dating Method
Zhongping Lai · Journal of Salt Lake Research · 2012
This paper introduces the basic principles of isochron 26Al/10Be burial dating.The 26Al-10Be concentrations of a set of coeval quartz samples may be grouped into a straight line by using least squares fitting.Then the samples' burial age can be calculated from the slope of the obtained isochron.In the following two cases,the isochron burial dating can address the issues where unknown parameters outnumber constraint equations:1.the dating of paleosol formation in a sequence of intercalated tills and paleosols to circumvent the presence of unknown 26Al/10Be inherited from past exposure.2.the dating of samples with posteriorly produced cosmogenic nuclides due to insufficient shielding.Besides,according to the result of linear fit,whether or not the samples conform to the simple steady-state erosion model can be verified.The establishment of isochron method broadens the application range of burial dating.Moreover,this approach can provide an effective means to check the reliability of burial ages.