EVALUATION OF PARAMETERS OF LINEAR ISOCHR ONES IN ISOTOPE GEOLOGY

An experience has been summarized on the using of polynomial least squ ares technique usually applicable in calculations of age and initial i sotope ratio from experimental data in isotope geochronometry. Origina l computational technique has been given to calculate errors in isochr ones calculation in different coordinate systems. This technique consi der deviations of experimental points from linear dependence due to an alytical errors and isochrone model violation caused by geochemical ef fects. It has been shown that probability density isolines form ellips es in coordinates (1 - e(lambdaT)) - Sr-87/Sr-86 whose location on thi s plot shows age and genetic relationships of the studied geological o bjects.