Research
Ion microprobe analysis of zircon is now a routine technique. Combined with optical and electron imaging techniques, especially cathodoluminescence, it allows the assessment of age heterogeneity or difference between age of core and overgross.
Examples of Ahrens-Wetherill concordia plots for various types of zircons:
Example of plot for local elemental rare-earth analysis in zircons:
Example of Tera-Wasserburg plot (observed, uncorrected for common lead) for young zircons:
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