For instance, imaging the cathodoluminescence emission from fast electrons can be used as a prescreening tool for high-resolution secondary-ion-mass dating SIMS to image the zonation pattern and identify regions of interest for isotope analysis.
That may or may not be the case, depending on the validity of the residual helium calculations in that study. That story is based on the assumption that only random natural processes have operated zircon eons of time with no hint that any Creator was necessary or involved. After all, determining the accuracy of this date was the objective of the study!
They never recognize the underlying unprovable datings on which the U-Th-Pb system is based. In that work, zircon specimens were obtained from the Gold Butte formation in southeastern Nevada near Lake Mead. Zircon is a robust mineral and so the crystals preserve the age at which they formed or underwent high grade metamorphism.
The diffusion rates are plotted on semilog axes against the reciprocal of the temperature in degrees Kelvin. Could it be different amounts of radiogenic Pb are produced? Finally, ages can also be determined from the U—Pb system by analysis of Pb isotope ratios alone.
This history all sounds reasonable, but none of it was observed.
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