Systematics of internal zircon morphology in major Variscan granitoid types

  title={Systematics of internal zircon morphology in major Variscan granitoid types},
  author={Gerhard Vavra},
  journal={Contributions to Mineralogy and Petrology},
  • G. Vavra
  • Published 1 September 1994
  • Geology
  • Contributions to Mineralogy and Petrology
The internal morphologies of zircon crystals from different types of granitoids (alkaline, calcalkaline and anatectic) are revealed by cathodoluminescence imaging and are described in terms of growth rates of the crystal faces relative to each other. Zircons in the alkaline granitoids are characterized by high and constant growth rates of {010} relative to the pyramidal forms and by symmetric grwoth of {011}. Zircons in the calcalkaline and anatectic granitoids are characterized by fluctuating… 
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