抄録
As a continuum of the preceding studies on the three-dimensional U-Pb method (Zheng, 1989), a further U-Pb discordia plane model is developed by taking the measured isotope ratios 235U/207Pb, 206Pb/207Pb and 204Pb/207Pb for X, Y and Z axis respectively. Its geometry and applicability are elucidated in order to show the advantage of the three-dimensional U-Pb isotopic data presentation.
